Empathy List Archives

PS

Perry Sandeen

Fri, Jan 7, 2011 11:31 PM

List,

Several members have mentioned that they have HP 10811 style oscillators. A very neat packaging solution with dividers and circuits is posted at: KH6GRT. Do a Google search.

Regards,

Perrier

List, Several members have mentioned that they have HP 10811 style oscillators. A very neat packaging solution with dividers and circuits is posted at: KH6GRT. Do a Google search. Regards, Perrier

RD

Robert Darlington

Sat, Jan 8, 2011 12:31 AM

And for those of us that really hate being teased into doing a google search
when it's just as easy to paste the link, here's the link:
http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm

Here's the main page where the above frequency standard is listed:
http://www.qsl.net/kh6grt/page4/technical.htm

-Bob

On Fri, Jan 7, 2011 at 4:31 PM, Perry Sandeen sandeenpa@yahoo.com wrote:

List,

Several members have mentioned that they have HP 10811 style oscillators.
A very neat packaging solution with dividers and circuits is posted at:
KH6GRT. Do a Google search.

Regards,

Perrier

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And for those of us that really hate being teased into doing a google search when it's just as easy to paste the link, here's the link: http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm Here's the main page where the above frequency standard is listed: http://www.qsl.net/kh6grt/page4/technical.htm -Bob On Fri, Jan 7, 2011 at 4:31 PM, Perry Sandeen <sandeenpa@yahoo.com> wrote: > > List, > > Several members have mentioned that they have HP 10811 style oscillators. > A very neat packaging solution with dividers and circuits is posted at: > KH6GRT. Do a Google search. > > Regards, > > Perrier > > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

TV

Tom Van Baak

Sat, Jan 8, 2011 1:22 AM

Has anyone experimented with the amount of insulation on a
10544 or 10811 oscillator? They are meant to run hot by
design and I worry that adding any insulation, or too much
insulation, will either cause over-heating or limit the ability
of the oven control to maintain the set point.

None of the hp/Agilent bench test equipment that uses these
oscillators uses insulation. Perhaps that's a clue.

/tvb

----- Original Message -----
From: "Robert Darlington" rdarlington@gmail.com
To: "Discussion of precise time and frequency measurement" time-nuts@febo.com
Sent: Friday, January 07, 2011 4:31 PM
Subject: Re: [time-nuts] Oscillator Packaging

And for those of us that really hate being teased into doing a google search
when it's just as easy to paste the link, here's the link:
http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm

Here's the main page where the above frequency standard is listed:
http://www.qsl.net/kh6grt/page4/technical.htm

-Bob

Has anyone experimented with the amount of insulation on a 10544 or 10811 oscillator? They are meant to run hot by design and I worry that adding any insulation, or too much insulation, will either cause over-heating or limit the ability of the oven control to maintain the set point. None of the hp/Agilent bench test equipment that uses these oscillators uses insulation. Perhaps that's a clue. /tvb ----- Original Message ----- From: "Robert Darlington" <rdarlington@gmail.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Friday, January 07, 2011 4:31 PM Subject: Re: [time-nuts] Oscillator Packaging > And for those of us that really hate being teased into doing a google search > when it's just as easy to paste the link, here's the link: > http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm > > Here's the main page where the above frequency standard is listed: > http://www.qsl.net/kh6grt/page4/technical.htm > > -Bob

MD

Magnus Danielson

Sat, Jan 8, 2011 1:43 AM

On 08/01/11 02:22, Tom Van Baak wrote:

Has anyone experimented with the amount of insulation on a
10544 or 10811 oscillator? They are meant to run hot by
design and I worry that adding any insulation, or too much
insulation, will either cause over-heating or limit the ability
of the oven control to maintain the set point.

Too much is indeed something to worry about. An oven relies on the
radiation to the surroundings to get off excessive heat.

Looking at the photos, it is not THAT much. Not very thick at all. See
the naked 10811 next to it.

None of the hp/Agilent bench test equipment that uses these
oscillators uses insulation. Perhaps that's a clue.

But the manual do recommend to put them in a turbolent free
environment, essentially on in the normal air-flow of fans.

You can do a lot just by blocking direct flow of air.

Cheers,
Magnus

On 08/01/11 02:22, Tom Van Baak wrote: > Has anyone experimented with the amount of insulation on a > 10544 or 10811 oscillator? They are meant to run hot by > design and I worry that adding any insulation, or too much > insulation, will either cause over-heating or limit the ability > of the oven control to maintain the set point. Too much is indeed something to worry about. An oven relies on the radiation to the surroundings to get off excessive heat. Looking at the photos, it is not THAT much. Not very thick at all. See the naked 10811 next to it. > None of the hp/Agilent bench test equipment that uses these > oscillators uses insulation. Perhaps that's a clue. But the manual *do* recommend to put them in a turbolent free environment, essentially on in the normal air-flow of fans. You can do a lot just by blocking direct flow of air. Cheers, Magnus

R(

Richard (Rick) Karlquist

Sat, Jan 8, 2011 3:09 AM

On 1/7/2011 5:22 PM, Tom Van Baak wrote:

Has anyone experimented with the amount of insulation on a
10544 or 10811 oscillator? They are meant to run hot by
design and I worry that adding any insulation, or too much
insulation, will either cause over-heating or limit the ability
of the oven control to maintain the set point.

None of the hp/Agilent bench test equipment that uses these
oscillators uses insulation. Perhaps that's a clue.

/tvb

The amount of insulation that can be used is limited by the
thermal overhead inside the oven, and is a function of the
oven set point and maximum ambient temperature. High thermal
gain is achieved by controlling gradients, as explained in
my 1997 IEEE FCS paper on ovens. Also read the HP Journal
article on the 10811.

Rick Karlquist N6RK

On 1/7/2011 5:22 PM, Tom Van Baak wrote: > Has anyone experimented with the amount of insulation on a > 10544 or 10811 oscillator? They are meant to run hot by > design and I worry that adding any insulation, or too much > insulation, will either cause over-heating or limit the ability > of the oven control to maintain the set point. > > None of the hp/Agilent bench test equipment that uses these > oscillators uses insulation. Perhaps that's a clue. > > /tvb The amount of insulation that can be used is limited by the thermal overhead inside the oven, and is a function of the oven set point and maximum ambient temperature. High thermal gain is achieved by controlling gradients, as explained in my 1997 IEEE FCS paper on ovens. Also read the HP Journal article on the 10811. Rick Karlquist N6RK

CH

Chuck Harris

Sat, Jan 8, 2011 3:52 AM

There is an old saying:

If you give a man a fish, he won't be hungry for one day.
If you teach a man to fish, he won't be hungry for life.

Yes, it is just as easy to post the link, but then what
does he learn? He learns to rely on others to do his
work for him.

Everyone needs to learn how to search.

-Chuck Harris

Robert Darlington wrote:

And for those of us that really hate being teased into doing a google search
when it's just as easy to paste the link, here's the link:
http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm

Here's the main page where the above frequency standard is listed:
http://www.qsl.net/kh6grt/page4/technical.htm

-Bob

There is an old saying: If you give a man a fish, he won't be hungry for one day. If you teach a man to fish, he won't be hungry for life. Yes, it is just as easy to post the link, but then what does he learn? He learns to rely on others to do his work for him. Everyone needs to learn how to search. -Chuck Harris Robert Darlington wrote: > And for those of us that really hate being teased into doing a google search > when it's just as easy to paste the link, here's the link: > http://www.qsl.net/kh6grt/page4/freqstd/freqstd.htm > > Here's the main page where the above frequency standard is listed: > http://www.qsl.net/kh6grt/page4/technical.htm > > -Bob

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Oscillator Packaging