Empathy List Archives

TC

Trevor Clarke

Sun, Nov 22, 2020 4:56 PM

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

Trevor R.H. Clarke, K8TRC

I've had an on again of again interest in lightbulb antennas and know of some people using them in the hf with different levels of success. I haven't seen anyone working with them in UHF and higher. Anybody tried this? A lot of the inefficiency comes from the relatively short filament lengths but that might not be an issue in say, the 33cm band. Could be an interested field day or June VHF contest experiment. Trevor R.H. Clarke, K8TRC

DW

Dana Whitlow

Sun, Nov 22, 2020 5:06 PM

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

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, As near as I can tell, the lightbulb antennas are just an exercise in being "cute". Unless you are desperate for a visual indication that your transmitter and feedline are working, there is no redeeming value (social or otherwise) to including a lightbulb in your antenna system. Dana On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > I've had an on again of again interest in lightbulb antennas and know of > some people using them in the hf with different levels of success. I > haven't seen anyone working with them in UHF and higher. Anybody tried > this? A lot of the inefficiency comes from the relatively short filament > lengths but that might not be an issue in say, the 33cm band. Could be an > interested field day or June VHF contest experiment. > > 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 >

TC

Trevor Clarke

Sun, Nov 22, 2020 6:38 PM

Sort of..it is a silly exercise but I see it as pushing the envelope with
odd-ball makeshift antennas and seeing what you can do with poor materials.

On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

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/

Sort of..it is a silly exercise but I see it as pushing the envelope with odd-ball makeshift antennas and seeing what you can do with poor materials. On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list < mvus-list@lists.febo.com> wrote: > Trevor, > > As near as I can tell, the lightbulb antennas are just an exercise in > being "cute". Unless you are desperate for a visual indication that > your transmitter and feedline are working, there is no redeeming > value (social or otherwise) to including a lightbulb in your antenna > system. > > Dana > > > On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < > mvus-list@lists.febo.com> wrote: > > > I've had an on again of again interest in lightbulb antennas and know of > > some people using them in the hf with different levels of success. I > > haven't seen anyone working with them in UHF and higher. Anybody tried > > this? A lot of the inefficiency comes from the relatively short filament > > lengths but that might not be an issue in say, the 33cm band. Could be an > > interested field day or June VHF contest experiment. > > > > 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 > -- Trevor R.H. Clarke Computer Science House Rochester Institute of Technology retrev@csh.rit.edu http://www.csh.rit.edu/~retrev/

KB

KENT BRITAIN

Sun, Nov 22, 2020 6:40 PM

I look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB

On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:

Sort of..it is a silly exercise but I see it as pushing the envelope with
odd-ball makeshift antennas and seeing what you can do with poor materials.

On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

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 look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote: Sort of..it is a silly exercise but I see it as pushing the envelope with odd-ball makeshift antennas and seeing what you can do with poor materials. On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list < mvus-list@lists.febo.com> wrote: > Trevor, > > As near as I can tell, the lightbulb antennas are just an exercise in > being "cute". Unless you are desperate for a visual indication that > your transmitter and feedline are working, there is no redeeming > value (social or otherwise) to including a lightbulb in your antenna > system. > > Dana > > > On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < > mvus-list@lists.febo.com> wrote: > > > I've had an on again of again interest in lightbulb antennas and know of > > some people using them in the hf with different levels of success. I > > haven't seen anyone working with them in UHF and higher. Anybody tried > > this? A lot of the inefficiency comes from the relatively short filament > > lengths but that might not be an issue in say, the 33cm band. Could be an > > interested field day or June VHF contest experiment. > > > > 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 > -- 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

BR

Bruce Raymond

Sun, Nov 22, 2020 7:44 PM

Just thinking ... you could get with the times and use an LED instead of
an incandescent bulb :-)

73 Bruce

KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM:

I look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB

  On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote:

Sort of..it is a silly exercise but I see it as pushing the envelope with
odd-ball makeshift antennas and seeing what you can do with poor materials.

On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

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

Just thinking ... you could get with the times and use an LED instead of an incandescent bulb :-) 73 Bruce KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM: > I look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB > > On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote: > > Sort of..it is a silly exercise but I see it as pushing the envelope with > odd-ball makeshift antennas and seeing what you can do with poor materials. > > On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list < > mvus-list@lists.febo.com> wrote: > >> Trevor, >> >> As near as I can tell, the lightbulb antennas are just an exercise in >> being "cute". Unless you are desperate for a visual indication that >> your transmitter and feedline are working, there is no redeeming >> value (social or otherwise) to including a lightbulb in your antenna >> system. >> >> Dana >> >> >> On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < >> mvus-list@lists.febo.com> wrote: >> >>> I've had an on again of again interest in lightbulb antennas and know of >>> some people using them in the hf with different levels of success. I >>> haven't seen anyone working with them in UHF and higher. Anybody tried >>> this? A lot of the inefficiency comes from the relatively short filament >>> lengths but that might not be an issue in say, the 33cm band. Could be an >>> interested field day or June VHF contest experiment. >>> >>> 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 >> >

GT

Gary Turner

Sun, Nov 22, 2020 7:50 PM

and reduce your power by 90%.....

On Sun, Nov 22, 2020 at 2:45 PM Bruce Raymond via mvus-list <
mvus-list@lists.febo.com> wrote:

Just thinking ... you could get with the times and use an LED instead of
an incandescent bulb :-)

73 Bruce

KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM:

I look forward to testing one on the Central States VHF Society

Antenna Range!50 MHz - 47 GHz. Kent WA5VJB

  On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via

mvus-list mvus-list@lists.febo.com wrote:

Sort of..it is a silly exercise but I see it as pushing the envelope

with

odd-ball makeshift antennas and seeing what you can do with poor

materials.

On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know

of

some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short

filament

lengths but that might not be an issue in say, the 33cm band. Could be

an

interested field day or June VHF contest experiment.

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

--
Gary Turner 1-937-387-8876 N8SPY (Amateur Extra)
CNSS 4011 Network+ A+
Trustee, Dayton Microcomputer Association, Inc.

and reduce your power by 90%..... On Sun, Nov 22, 2020 at 2:45 PM Bruce Raymond via mvus-list < mvus-list@lists.febo.com> wrote: > Just thinking ... you could get with the times and use an LED instead of > an incandescent bulb :-) > > 73 Bruce > > > KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM: > > I look forward to testing one on the Central States VHF Society > Antenna Range!50 MHz - 47 GHz. Kent WA5VJB > > > > On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via > mvus-list <mvus-list@lists.febo.com> wrote: > > > > Sort of..it is a silly exercise but I see it as pushing the envelope > with > > odd-ball makeshift antennas and seeing what you can do with poor > materials. > > > > On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list < > > mvus-list@lists.febo.com> wrote: > > > >> Trevor, > >> > >> As near as I can tell, the lightbulb antennas are just an exercise in > >> being "cute". Unless you are desperate for a visual indication that > >> your transmitter and feedline are working, there is no redeeming > >> value (social or otherwise) to including a lightbulb in your antenna > >> system. > >> > >> Dana > >> > >> > >> On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < > >> mvus-list@lists.febo.com> wrote: > >> > >>> I've had an on again of again interest in lightbulb antennas and know > of > >>> some people using them in the hf with different levels of success. I > >>> haven't seen anyone working with them in UHF and higher. Anybody tried > >>> this? A lot of the inefficiency comes from the relatively short > filament > >>> lengths but that might not be an issue in say, the 33cm band. Could be > an > >>> interested field day or June VHF contest experiment. > >>> > >>> 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 > -- Gary Turner 1-937-387-8876 N8SPY (Amateur Extra) CNSS 4011 Network+ A+ Trustee, Dayton Microcomputer Association, Inc.

KB

KENT BRITAIN

Sun, Nov 22, 2020 7:53 PM

The LED is a non-linear device. Would produce lot's of harmonics!
Uhhhh. they do work at a pretty high frequency, maybe they could be
used in a microwave/millimeter wave beacon!! hihi

On Sunday, November 22, 2020, 1:45:05 PM CST, Bruce Raymond via mvus-list <mvus-list@lists.febo.com> wrote:

Just thinking ... you could get with the times and use an LED instead of
an incandescent bulb :-)

73 Bruce

KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM:

I look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB

On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list mvus-list@lists.febo.com wrote:

Sort of..it is a silly exercise but I see it as pushing the envelope with
odd-ball makeshift antennas and seeing what you can do with poor materials.

On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list <
mvus-list@lists.febo.com> wrote:

Trevor,

As near as I can tell, the lightbulb antennas are just an exercise in
being "cute". Unless you are desperate for a visual indication that
your transmitter and feedline are working, there is no redeeming
value (social or otherwise) to including a lightbulb in your antenna
system.

Dana

On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

I've had an on again of again interest in lightbulb antennas and know of
some people using them in the hf with different levels of success. I
haven't seen anyone working with them in UHF and higher. Anybody tried
this? A lot of the inefficiency comes from the relatively short filament
lengths but that might not be an issue in say, the 33cm band. Could be an
interested field day or June VHF contest experiment.

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

The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh. they do work at a pretty high frequency, maybe they could be used in a microwave/millimeter wave beacon!! hihi On Sunday, November 22, 2020, 1:45:05 PM CST, Bruce Raymond via mvus-list <mvus-list@lists.febo.com> wrote: Just thinking ... you could get with the times and use an LED instead of an incandescent bulb :-) 73 Bruce KENT BRITAIN via mvus-list wrote on 11/22/2020 12:40 PM: > I look forward to testing one on the Central States VHF Society Antenna Range!50 MHz - 47 GHz. Kent WA5VJB > > On Sunday, November 22, 2020, 12:39:15 PM CST, Trevor Clarke via mvus-list <mvus-list@lists.febo.com> wrote: > > Sort of..it is a silly exercise but I see it as pushing the envelope with > odd-ball makeshift antennas and seeing what you can do with poor materials. > > On Sun, Nov 22, 2020 at 12:07 PM Dana Whitlow via mvus-list < > mvus-list@lists.febo.com> wrote: > >> Trevor, >> >> As near as I can tell, the lightbulb antennas are just an exercise in >> being "cute". Unless you are desperate for a visual indication that >> your transmitter and feedline are working, there is no redeeming >> value (social or otherwise) to including a lightbulb in your antenna >> system. >> >> Dana >> >> >> On Sun, Nov 22, 2020 at 10:57 AM Trevor Clarke via mvus-list < >> mvus-list@lists.febo.com> wrote: >> >>> I've had an on again of again interest in lightbulb antennas and know of >>> some people using them in the hf with different levels of success. I >>> haven't seen anyone working with them in UHF and higher. Anybody tried >>> this? A lot of the inefficiency comes from the relatively short filament >>> lengths but that might not be an issue in say, the 33cm band. Could be an >>> interested field day or June VHF contest experiment. >>> >>> 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

TC

Trevor Clarke

Sun, Nov 22, 2020 8:02 PM

Most lightbulbs with LEDs use a grid of LEDs...so you could use it as
a phased array

The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh. they do work at a pretty high frequency, maybe they could be used in a microwave/millimeter wave beacon!! hihi

Most lightbulbs with LEDs use a grid of LEDs...so you could use it as a phased array > The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh. they do work at a pretty high frequency, maybe they could be used in a microwave/millimeter wave beacon!! hihi

DW

Dana Whitlow

Sun, Nov 22, 2020 9:07 PM

While we're at it: use a tight grid of diode lasers and see if they'll
injection
lock together- if they do, it will be an optical phased array- in short, a
(nearly) monochromatic (and rather expensive) flashlight!

Dana

On Sun, Nov 22, 2020 at 2:03 PM Trevor Clarke via mvus-list <
mvus-list@lists.febo.com> wrote:

Most lightbulbs with LEDs use a grid of LEDs...so you could use it as
a phased array

The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh.

they do work at a pretty high frequency, maybe they could be used in a
microwave/millimeter wave beacon!! hihi

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

While we're at it: use a tight grid of diode lasers and see if they'll injection lock together- if they do, it will be an optical phased array- in short, a (nearly) monochromatic (and rather expensive) flashlight! Dana On Sun, Nov 22, 2020 at 2:03 PM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > Most lightbulbs with LEDs use a grid of LEDs...so you could use it as > a phased array > > > > The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh. > they do work at a pretty high frequency, maybe they could be used in a > microwave/millimeter wave beacon!! hihi > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_lists.febo.com >

TH

Tom Holmes

Mon, Nov 23, 2020 12:32 AM

I think it all comes down to choosing the right
reflector.

Tom Holmes, N8ZM

-----Original Message-----
From: mvus-list mvus-list-bounces@lists.febo.com
On Behalf Of Dana Whitlow via mvus-list
Sent: Sunday, November 22, 2020 4:08 PM
To: Midwest VHF/UHF Society Mailing List
mvus-list@lists.febo.com
Cc: Dana Whitlow k8yumdoober@gmail.com
Subject: Re: [mvus-list] Lightbulb antennas

While we're at it: use a tight grid of diode
lasers and see if they'll
injection
lock together- if they do, it will be an optical
phased array- in short, a
(nearly) monochromatic (and rather expensive)
flashlight!

Dana

On Sun, Nov 22, 2020 at 2:03 PM Trevor Clarke via
mvus-list <
mvus-list@lists.febo.com> wrote:

Most lightbulbs with LEDs use a grid of

LEDs...so you could use it as

a phased array

The LED is a non-linear device. Would produce

lot's of harmonics! Uhhhh.

they do work at a pretty high frequency, maybe

they could be used in a

microwave/millimeter wave beacon!! hihi

mvus-list mailing list
mvus-list@lists.febo.com

http://lists.febo.com/mailman/listinfo/mvus-list_l
ists.febo.com

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

I think it all comes down to choosing the right reflector. Tom Holmes, N8ZM -----Original Message----- From: mvus-list <mvus-list-bounces@lists.febo.com> On Behalf Of Dana Whitlow via mvus-list Sent: Sunday, November 22, 2020 4:08 PM To: Midwest VHF/UHF Society Mailing List <mvus-list@lists.febo.com> Cc: Dana Whitlow <k8yumdoober@gmail.com> Subject: Re: [mvus-list] Lightbulb antennas While we're at it: use a tight grid of diode lasers and see if they'll injection lock together- if they do, it will be an optical phased array- in short, a (nearly) monochromatic (and rather expensive) flashlight! Dana On Sun, Nov 22, 2020 at 2:03 PM Trevor Clarke via mvus-list < mvus-list@lists.febo.com> wrote: > Most lightbulbs with LEDs use a grid of LEDs...so you could use it as > a phased array > > > > The LED is a non-linear device. Would produce lot's of harmonics! Uhhhh. > they do work at a pretty high frequency, maybe they could be used in a > microwave/millimeter wave beacon!! hihi > > _______________________________________________ > mvus-list mailing list > mvus-list@lists.febo.com > http://lists.febo.com/mailman/listinfo/mvus-list_l ists.febo.com > _______________________________________________ mvus-list mailing list mvus-list@lists.febo.com http://lists.febo.com/mailman/listinfo/mvus-list_l ists.febo.com