Empathy List Archives

TC

Trevor Clarke

Fri, Aug 7, 2020 3:18 PM

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a Nagoya
but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack on
the roof as well. I'm not particularly interested in cutting holes in the
roof and dealing with cable runs under the headwall. Should I stick with a
mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a Nagoya but open to suggestions on that. My main question is about mounting. My current antenna has a mag mount on the roof. I have a metal safari rack on the roof as well. I'm not particularly interested in cutting holes in the roof and dealing with cable runs under the headwall. Should I stick with a mag mount it mount it on the rack? It does it matter much Trevor R.H. Clarke, K8TRC

DW

Dana Whitlow

Fri, Aug 7, 2020 3:44 PM

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a Nagoya
but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack on
the roof as well. I'm not particularly interested in cutting holes in the
roof and dealing with cable runs under the headwall. Should I stick with a
mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

I believe it would depend a lot on the rack design. If you can use the magmount well away from the rack (or near the center of the rack if large enough), I suspect there would be little difference, unless the rack sticks up an appreciable fraction of lambda. I'd suggest trying it both ways, since it probably costs very little except for your time spent making some measurements. Dana On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a Nagoya > but open to suggestions on that. My main question is about mounting. My > current antenna has a mag mount on the roof. I have a metal safari rack on > the roof as well. I'm not particularly interested in cutting holes in the > roof and dealing with cable runs under the headwall. Should I stick with a > mag mount it mount it on the rack? It does it matter much > > Trevor R.H. Clarke, K8TRC > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com >

TH

Tom Holmes

Fri, Aug 7, 2020 7:32 PM

Trevor...

Dana is correct about staying clear of the rack, as it probably has a metal
core. Mounting to the rack will work fine, and there are several commercial
ones available, from Diamond and others. I am not familiar with the Nagoya
brand.

I have a spare rack mount you are welcome to try out to see how you like it.
It's a Diamond, I think. I used it on my Avalanche for several years and it
did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack on
the roof as well. I'm not particularly interested in cutting holes in the
roof and dealing with cable runs under the headwall. Should I stick with a
mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

Trevor... Dana is correct about staying clear of the rack, as it probably has a metal core. Mounting to the rack will work fine, and there are several commercial ones available, from Diamond and others. I am not familiar with the Nagoya brand. I have a spare rack mount you are welcome to try out to see how you like it. It's a Diamond, I think. I used it on my Avalanche for several years and it did fine, mainly to help my HT get out better. If you don't mind swinging up this way sometime, we can see if it fits, install it, and check out the tuning, all quite quickly, and properly SD'd. Tom Holmes, N8ZM -----Original Message----- From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana Whitlow via mvus-list Sent: Friday, August 07, 2020 11:45 AM To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> Cc: Dana Whitlow <k8yumdoober@gmail.com> Subject: Re: [mvus-list] Antenna advice I believe it would depend a lot on the rack design. If you can use the magmount well away from the rack (or near the center of the rack if large enough), I suspect there would be little difference, unless the rack sticks up an appreciable fraction of lambda. I'd suggest trying it both ways, since it probably costs very little except for your time spent making some measurements. Dana On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a Nagoya > but open to suggestions on that. My main question is about mounting. My > current antenna has a mag mount on the roof. I have a metal safari rack on > the roof as well. I'm not particularly interested in cutting holes in the > roof and dealing with cable runs under the headwall. Should I stick with a > mag mount it mount it on the rack? It does it matter much > > Trevor R.H. Clarke, K8TRC > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > _______________________________________________ mvus-list mailing list mvus-list@lists.febo.com http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

TC

Trevor Clarke

Fri, Aug 7, 2020 7:34 PM

Tom,
Does it take an nmo antenna?

On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor...

Dana is correct about staying clear of the rack, as it probably has a metal
core. Mounting to the rack will work fine, and there are several commercial
ones available, from Diamond and others. I am not familiar with the Nagoya
brand.

I have a spare rack mount you are welcome to try out to see how you like
it.
It's a Diamond, I think. I used it on my Avalanche for several years and it
did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana
Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack

on

the roof as well. I'm not particularly interested in cutting holes in the
roof and dealing with cable runs under the headwall. Should I stick with

a

mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/

Tom, Does it take an nmo antenna? On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list < mvus-list@lists.febo.com> wrote: > Trevor... > > Dana is correct about staying clear of the rack, as it probably has a metal > core. Mounting to the rack will work fine, and there are several commercial > ones available, from Diamond and others. I am not familiar with the Nagoya > brand. > > I have a spare rack mount you are welcome to try out to see how you like > it. > It's a Diamond, I think. I used it on my Avalanche for several years and it > did fine, mainly to help my HT get out better. > > If you don't mind swinging up this way sometime, we can see if it fits, > install it, and check out the tuning, all quite quickly, and properly SD'd. > > Tom Holmes, N8ZM > > -----Original Message----- > From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana > Whitlow > via mvus-list > Sent: Friday, August 07, 2020 11:45 AM > To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> > Cc: Dana Whitlow <k8yumdoober@gmail.com> > Subject: Re: [mvus-list] Antenna advice > > I believe it would depend a lot on the rack design. > > If you can use the magmount well away from the > rack (or near the center of the rack if large enough), > I suspect there would be little difference, unless the > rack sticks up an appreciable fraction of lambda. > > I'd suggest trying it both ways, since it probably costs > very little except for your time spent making some > measurements. > > Dana > > > On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < > mvus-list@lists.febo.com> wrote: > > > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a > Nagoya > > but open to suggestions on that. My main question is about mounting. My > > current antenna has a mag mount on the roof. I have a metal safari rack > on > > the roof as well. I'm not particularly interested in cutting holes in the > > roof and dealing with cable runs under the headwall. Should I stick with > a > > mag mount it mount it on the rack? It does it matter much > > > > Trevor R.H. Clarke, K8TRC > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > -- Trevor R.H. Clarke Computer Science House Rochester Institute of Technology retrev@csh.rit.edu http://www.csh.rit.edu/~retrev/

TH

Tom Holmes

Fri, Aug 7, 2020 7:55 PM

Yes. That's my preferred mount.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Trevor
Clarke via mvus-list
Sent: Friday, August 07, 2020 3:35 PM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu
Subject: Re: [mvus-list] Antenna advice

Tom,
Does it take an nmo antenna?

On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor...

Dana is correct about staying clear of the rack, as it probably has a

metal

core. Mounting to the rack will work fine, and there are several

commercial

ones available, from Diamond and others. I am not familiar with the Nagoya
brand.

I have a spare rack mount you are welcome to try out to see how you like
it.
It's a Diamond, I think. I used it on my Avalanche for several years and

it

did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly

SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana
Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack

on

the roof as well. I'm not particularly interested in cutting holes in

the

roof and dealing with cable runs under the headwall. Should I stick with

a

mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

Yes. That's my preferred mount. Tom Holmes, N8ZM -----Original Message----- From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Trevor Clarke via mvus-list Sent: Friday, August 07, 2020 3:35 PM To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> Cc: Trevor Clarke <retrev@csh.rit.edu> Subject: Re: [mvus-list] Antenna advice Tom, Does it take an nmo antenna? On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list < mvus-list@lists.febo.com> wrote: > Trevor... > > Dana is correct about staying clear of the rack, as it probably has a metal > core. Mounting to the rack will work fine, and there are several commercial > ones available, from Diamond and others. I am not familiar with the Nagoya > brand. > > I have a spare rack mount you are welcome to try out to see how you like > it. > It's a Diamond, I think. I used it on my Avalanche for several years and it > did fine, mainly to help my HT get out better. > > If you don't mind swinging up this way sometime, we can see if it fits, > install it, and check out the tuning, all quite quickly, and properly SD'd. > > Tom Holmes, N8ZM > > -----Original Message----- > From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana > Whitlow > via mvus-list > Sent: Friday, August 07, 2020 11:45 AM > To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> > Cc: Dana Whitlow <k8yumdoober@gmail.com> > Subject: Re: [mvus-list] Antenna advice > > I believe it would depend a lot on the rack design. > > If you can use the magmount well away from the > rack (or near the center of the rack if large enough), > I suspect there would be little difference, unless the > rack sticks up an appreciable fraction of lambda. > > I'd suggest trying it both ways, since it probably costs > very little except for your time spent making some > measurements. > > Dana > > > On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < > mvus-list@lists.febo.com> wrote: > > > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a > Nagoya > > but open to suggestions on that. My main question is about mounting. My > > current antenna has a mag mount on the roof. I have a metal safari rack > on > > the roof as well. I'm not particularly interested in cutting holes in the > > roof and dealing with cable runs under the headwall. Should I stick with > a > > mag mount it mount it on the rack? It does it matter much > > > > Trevor R.H. Clarke, K8TRC > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > -- Trevor R.H. Clarke Computer Science House Rochester Institute of Technology retrev@csh.rit.edu http://www.csh.rit.edu/~retrev/ _______________________________________________ mvus-list mailing list mvus-list@lists.febo.com http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

TH

Tom Holmes

Fri, Aug 7, 2020 7:57 PM

I should mention that there are already antennas on them, so nothing needed
right away except if you have one to try.

Connectors are either SMA or UHF.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Trevor
Clarke via mvus-list
Sent: Friday, August 07, 2020 3:35 PM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Trevor Clarke retrev@csh.rit.edu
Subject: Re: [mvus-list] Antenna advice

Tom,
Does it take an nmo antenna?

On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor...

Dana is correct about staying clear of the rack, as it probably has a

metal

core. Mounting to the rack will work fine, and there are several

commercial

ones available, from Diamond and others. I am not familiar with the Nagoya
brand.

I have a spare rack mount you are welcome to try out to see how you like
it.
It's a Diamond, I think. I used it on my Avalanche for several years and

it

did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly

SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana
Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack

on

the roof as well. I'm not particularly interested in cutting holes in

the

roof and dealing with cable runs under the headwall. Should I stick with

a

mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

I should mention that there are already antennas on them, so nothing needed right away except if you have one to try. Connectors are either SMA or UHF. Tom Holmes, N8ZM -----Original Message----- From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Trevor Clarke via mvus-list Sent: Friday, August 07, 2020 3:35 PM To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> Cc: Trevor Clarke <retrev@csh.rit.edu> Subject: Re: [mvus-list] Antenna advice Tom, Does it take an nmo antenna? On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list < mvus-list@lists.febo.com> wrote: > Trevor... > > Dana is correct about staying clear of the rack, as it probably has a metal > core. Mounting to the rack will work fine, and there are several commercial > ones available, from Diamond and others. I am not familiar with the Nagoya > brand. > > I have a spare rack mount you are welcome to try out to see how you like > it. > It's a Diamond, I think. I used it on my Avalanche for several years and it > did fine, mainly to help my HT get out better. > > If you don't mind swinging up this way sometime, we can see if it fits, > install it, and check out the tuning, all quite quickly, and properly SD'd. > > Tom Holmes, N8ZM > > -----Original Message----- > From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana > Whitlow > via mvus-list > Sent: Friday, August 07, 2020 11:45 AM > To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> > Cc: Dana Whitlow <k8yumdoober@gmail.com> > Subject: Re: [mvus-list] Antenna advice > > I believe it would depend a lot on the rack design. > > If you can use the magmount well away from the > rack (or near the center of the rack if large enough), > I suspect there would be little difference, unless the > rack sticks up an appreciable fraction of lambda. > > I'd suggest trying it both ways, since it probably costs > very little except for your time spent making some > measurements. > > Dana > > > On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < > mvus-list@lists.febo.com> wrote: > > > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a > Nagoya > > but open to suggestions on that. My main question is about mounting. My > > current antenna has a mag mount on the roof. I have a metal safari rack > on > > the roof as well. I'm not particularly interested in cutting holes in the > > roof and dealing with cable runs under the headwall. Should I stick with > a > > mag mount it mount it on the rack? It does it matter much > > > > Trevor R.H. Clarke, K8TRC > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > -- Trevor R.H. Clarke Computer Science House Rochester Institute of Technology retrev@csh.rit.edu http://www.csh.rit.edu/~retrev/ _______________________________________________ mvus-list mailing list mvus-list@lists.febo.com http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

DW

Dana Whitlow

Fri, Aug 7, 2020 9:59 PM

Trevor & Tom,

If you do choose to mount the antenna on the rack itself,
it is important that the shield of the feedline be RF bonded to
the rack at the antenna location.

Similarly, if a magmount is used, the shield needs to be RF
bonded to the metal of the roof of the car. But don't panic-
this is normally accomplished by capacitive coupling through
the capacitor formed by the base of the magmount and the
roof metal, with the thin paint layer serving as the dielectric.

Dana

On Fri, Aug 7, 2020 at 2:35 PM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

Tom,
Does it take an nmo antenna?

On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor...

Dana is correct about staying clear of the rack, as it probably has a

metal

core. Mounting to the rack will work fine, and there are several

commercial

ones available, from Diamond and others. I am not familiar with the

Nagoya

brand.

I have a spare rack mount you are welcome to try out to see how you like
it.
It's a Diamond, I think. I used it on my Avalanche for several years and

it

did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly

SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana
Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting. My
current antenna has a mag mount on the roof. I have a metal safari rack

on

the roof as well. I'm not particularly interested in cutting holes in

the

roof and dealing with cable runs under the headwall. Should I stick

with

a

mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

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--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/

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Trevor & Tom, If you *do* choose to mount the antenna on the rack itself, it is important that the shield of the feedline be RF bonded to the rack at the antenna location. Similarly, if a magmount is used, the shield needs to be RF bonded to the metal of the roof of the car. But don't panic- this is normally accomplished by capacitive coupling through the capacitor formed by the base of the magmount and the roof metal, with the thin paint layer serving as the dielectric. Dana On Fri, Aug 7, 2020 at 2:35 PM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > Tom, > Does it take an nmo antenna? > > On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list < > mvus-list@lists.febo.com> wrote: > > > Trevor... > > > > Dana is correct about staying clear of the rack, as it probably has a > metal > > core. Mounting to the rack will work fine, and there are several > commercial > > ones available, from Diamond and others. I am not familiar with the > Nagoya > > brand. > > > > I have a spare rack mount you are welcome to try out to see how you like > > it. > > It's a Diamond, I think. I used it on my Avalanche for several years and > it > > did fine, mainly to help my HT get out better. > > > > If you don't mind swinging up this way sometime, we can see if it fits, > > install it, and check out the tuning, all quite quickly, and properly > SD'd. > > > > Tom Holmes, N8ZM > > > > -----Original Message----- > > From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana > > Whitlow > > via mvus-list > > Sent: Friday, August 07, 2020 11:45 AM > > To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> > > Cc: Dana Whitlow <k8yumdoober@gmail.com> > > Subject: Re: [mvus-list] Antenna advice > > > > I believe it would depend a lot on the rack design. > > > > If you can use the magmount well away from the > > rack (or near the center of the rack if large enough), > > I suspect there would be little difference, unless the > > rack sticks up an appreciable fraction of lambda. > > > > I'd suggest trying it both ways, since it probably costs > > very little except for your time spent making some > > measurements. > > > > Dana > > > > > > On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < > > mvus-list@lists.febo.com> wrote: > > > > > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a > > Nagoya > > > but open to suggestions on that. My main question is about mounting. My > > > current antenna has a mag mount on the roof. I have a metal safari rack > > on > > > the roof as well. I'm not particularly interested in cutting holes in > the > > > roof and dealing with cable runs under the headwall. Should I stick > with > > a > > > mag mount it mount it on the rack? It does it matter much > > > > > > Trevor R.H. Clarke, K8TRC > > > _______________________________________________ > > > mvus-list mailing list > > > mvus-list@lists.febo.com > > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > > > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > -- > Trevor R.H. Clarke > Computer Science House > Rochester Institute of Technology > retrev@csh.rit.edu > http://www.csh.rit.edu/~retrev/ > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com >

TH

Tom Holmes

Fri, Aug 7, 2020 10:36 PM

The problem with the word bonding is that it implies something like welding
or soldering, which is not the way it is used in the National Electrical
Code. I simply means that there is an electrical connection, which could be
as simple as a screw terminal or clamp. The confusion probably comes from
the use of the term in the area of adhesives, mostly by advertisers and
dentists.

Nevertheless, Dana is correct that the capacitive coupling of the coax
shield is typically an adequate 'connection' to the vehicle body so that it
may function as a ground plane.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana Whitlow
via mvus-list
Sent: Friday, August 07, 2020 6:00 PM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

Trevor & Tom,

If you do choose to mount the antenna on the rack itself,
it is important that the shield of the feedline be RF bonded to
the rack at the antenna location.

Similarly, if a magmount is used, the shield needs to be RF
bonded to the metal of the roof of the car. But don't panic-
this is normally accomplished by capacitive coupling through
the capacitor formed by the base of the magmount and the
roof metal, with the thin paint layer serving as the dielectric.

Dana

On Fri, Aug 7, 2020 at 2:35 PM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

Tom,
Does it take an nmo antenna?

On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor...

Dana is correct about staying clear of the rack, as it probably has a

metal

core. Mounting to the rack will work fine, and there are several

commercial

ones available, from Diamond and others. I am not familiar with the

Nagoya

brand.

I have a spare rack mount you are welcome to try out to see how you like
it.
It's a Diamond, I think. I used it on my Avalanche for several years and

it

did fine, mainly to help my HT get out better.

If you don't mind swinging up this way sometime, we can see if it fits,
install it, and check out the tuning, all quite quickly, and properly

SD'd.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com On Behalf Of Dana
Whitlow
via mvus-list
Sent: Friday, August 07, 2020 11:45 AM
To: Midwest VHF/UHF Society Mailing List mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Antenna advice

I believe it would depend a lot on the rack design.

If you can use the magmount well away from the
rack (or near the center of the rack if large enough),
I suspect there would be little difference, unless the
rack sticks up an appreciable fraction of lambda.

I'd suggest trying it both ways, since it probably costs
very little except for your time spent making some
measurements.

Dana

On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a

Nagoya

but open to suggestions on that. My main question is about mounting.

My

current antenna has a mag mount on the roof. I have a metal safari

rack

on

the roof as well. I'm not particularly interested in cutting holes in

the

roof and dealing with cable runs under the headwall. Should I stick

with

a

mag mount it mount it on the rack? It does it matter much

Trevor R.H. Clarke, K8TRC

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

--
Trevor R.H. Clarke
Computer Science House
Rochester Institute of Technology
retrev@csh.rit.edu
http://www.csh.rit.edu/~retrev/

mvus-list mailing list
mvus-list@lists.febo.com
http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com

The problem with the word bonding is that it implies something like welding or soldering, which is not the way it is used in the National Electrical Code. I simply means that there is an electrical connection, which could be as simple as a screw terminal or clamp. The confusion probably comes from the use of the term in the area of adhesives, mostly by advertisers and dentists. Nevertheless, Dana is correct that the capacitive coupling of the coax shield is typically an adequate 'connection' to the vehicle body so that it may function as a ground plane. Tom Holmes, N8ZM -----Original Message----- From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana Whitlow via mvus-list Sent: Friday, August 07, 2020 6:00 PM To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> Cc: Dana Whitlow <k8yumdoober@gmail.com> Subject: Re: [mvus-list] Antenna advice Trevor & Tom, If you *do* choose to mount the antenna on the rack itself, it is important that the shield of the feedline be RF bonded to the rack at the antenna location. Similarly, if a magmount is used, the shield needs to be RF bonded to the metal of the roof of the car. But don't panic- this is normally accomplished by capacitive coupling through the capacitor formed by the base of the magmount and the roof metal, with the thin paint layer serving as the dielectric. Dana On Fri, Aug 7, 2020 at 2:35 PM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > Tom, > Does it take an nmo antenna? > > On Fri, Aug 7, 2020 at 3:33 PM Tom Holmes via mvus-list < > mvus-list@lists.febo.com> wrote: > > > Trevor... > > > > Dana is correct about staying clear of the rack, as it probably has a > metal > > core. Mounting to the rack will work fine, and there are several > commercial > > ones available, from Diamond and others. I am not familiar with the > Nagoya > > brand. > > > > I have a spare rack mount you are welcome to try out to see how you like > > it. > > It's a Diamond, I think. I used it on my Avalanche for several years and > it > > did fine, mainly to help my HT get out better. > > > > If you don't mind swinging up this way sometime, we can see if it fits, > > install it, and check out the tuning, all quite quickly, and properly > SD'd. > > > > Tom Holmes, N8ZM > > > > -----Original Message----- > > From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana > > Whitlow > > via mvus-list > > Sent: Friday, August 07, 2020 11:45 AM > > To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> > > Cc: Dana Whitlow <k8yumdoober@gmail.com> > > Subject: Re: [mvus-list] Antenna advice > > > > I believe it would depend a lot on the rack design. > > > > If you can use the magmount well away from the > > rack (or near the center of the rack if large enough), > > I suspect there would be little difference, unless the > > rack sticks up an appreciable fraction of lambda. > > > > I'd suggest trying it both ways, since it probably costs > > very little except for your time spent making some > > measurements. > > > > Dana > > > > > > On Fri, Aug 7, 2020 at 10:19 AM Trevor Clarke via mvus-list < > > mvus-list@lists.febo.com> wrote: > > > > > I'm getting a new 2m/70cm antenna for my vehicle. Probably getting a > > Nagoya > > > but open to suggestions on that. My main question is about mounting. My > > > current antenna has a mag mount on the roof. I have a metal safari rack > > on > > > the roof as well. I'm not particularly interested in cutting holes in > the > > > roof and dealing with cable runs under the headwall. Should I stick > with > > a > > > mag mount it mount it on the rack? It does it matter much > > > > > > Trevor R.H. Clarke, K8TRC > > > _______________________________________________ > > > mvus-list mailing list > > > mvus-list@lists.febo.com > > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > > > > _______________________________________________ > > mvus-list mailing list > > mvus-list@lists.febo.com > > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > > > > > -- > Trevor R.H. Clarke > Computer Science House > Rochester Institute of Technology > retrev@csh.rit.edu > http://www.csh.rit.edu/~retrev/ > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com > _______________________________________________ mvus-list mailing list mvus-list@lists.febo.com http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com