See: http://www.leapsecond.com/pages/tbolt-temp/
Hi Mark,
This is very interesting work that you're doing with Thunderbolt
DS1620 temperature sensors. I hope you stick with it. I agree
with Said about the double bind idea.
I worry too that your TBolts are remembering something of the
past in spi
10544A buffers
5370A: 1K + 10pF in series connected from 10544A output to input of an
ECL line receiver cascade.
5345A: 1K + 910pF in series connected from 10544A output to input of CC
CB long tailed pair isolation amplifier.
1K from CC base to ground.
Since the 10544A phase noise floor is relat
I've always found that the BAMA mirror site at
[1]http://bama.edebris.com/manuals/ is much faster than the main site.
Ed
Bruce Griffiths wrote:
Scott Newell wrote:
At 07:41 PM 3/7/2009, Tom Van Baak wrote:
I know *late* model 5245L counters used the 10544A oscillator.
Perhaps ot
Scott Newell wrote:
> At 07:41 PM 3/7/2009, Tom Van Baak wrote:
>
>
>> I know *late* model 5245L counters used the 10544A oscillator.
>> Perhaps others in the group can provide other examples and
>> then you can head off to the online manual sites and grab the
>> info you need from the PDF files
Scott Newell wrote:
> At 07:41 PM 3/7/2009, Tom Van Baak wrote:
>
>
>> I know *late* model 5245L counters used the 10544A oscillator.
>> Perhaps others in the group can provide other examples and
>> then you can head off to the online manual sites and grab the
>> info you need from the PDF files
At 07:41 PM 3/7/2009, Tom Van Baak wrote:
>I know *late* model 5245L counters used the 10544A oscillator.
>Perhaps others in the group can provide other examples and
>then you can head off to the online manual sites and grab the
>info you need from the PDF files.
My 5345A has a 10544A.
--
newel
Tom Van Baak wrote:
>> I have been able to find schematics of the 10544A but not a service manual.
>> Is there a service manual available?
>>
>
> http://www.leapsecond.com/museum/10544/
>
> I'll look for something like a service manual. I know I have some
> interesting info in the 10544. When
Tom Van Baak wrote:
>> I have been able to find schematics of the 10544A but not a service manual.
>> Is there a service manual available?
>>
>
> http://www.leapsecond.com/museum/10544/
>
> I'll look for something like a service manual. I know I have some
> interesting info in the 10544. When
>I have been able to find schematics of the 10544A but not a service manual.
> Is there a service manual available?
http://www.leapsecond.com/museum/10544/
I'll look for something like a service manual. I know I have some
interesting info in the 10544. When I find it I'll update the page.
One th
Esa Heikkinen wrote:
> > Its probably better to increase the emitter current to 40mA or
> > so and place 47 ohms between the emitter and the output coupling
> > capacitor a and accept the resultant +7dBm output.
> > The transistor dissipation will increase and it may be better to
> > substitut
Esa Heikkinen wrote:
> > Its probably better to increase the emitter current to 40mA or
> > so and place 47 ohms between the emitter and the output coupling
> > capacitor a and accept the resultant +7dBm output.
> > The transistor dissipation will increase and it may be better to
> > substitut
Reading and comprehension skills skills aside, Helmut is an ubber cool name!
++ Helmut!
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
--- On Sat, 3/7/09, gandal...@aol.com wrote:
> From: gandal...@aol.com
> Subject:
> Its probably better to increase the emitter current to 40mA or
> so and place 47 ohms between the emitter and the output coupling
> capacitor a and accept the resultant +7dBm output.
> The transistor dissipation will increase and it may be better to
> substitute something like a 2N5943, 2N38
Esa Heikkinen wrote:
> I also doubt that there could be something wrong with emitter follower
> so I also did some tests with "capacitive coupler" build on bottom PCB
> of the HP10544:
> http://www.amigazone.fi/files/gpsdo/544coupler.jpg
> (1 kohm. terminaton is not visible on the picture)
>
> Ge
Helmut maybe you are not seeing it but it is the 2nd line attached below.
Alan G3NYK
- Original Message -
From:
To:
Sent: Saturday, March 07, 2009 4:31 PM
Subject: [time-nuts] delete
> Please delete me from the email distribution list.
> Thanks!
> Helmut
> __
Esa Heikkinen wrote:
> I also doubt that there could be something wrong with emitter follower
> so I also did some tests with "capacitive coupler" build on bottom PCB
> of the HP10544:
> http://www.amigazone.fi/files/gpsdo/544coupler.jpg
> (1 kohm. terminaton is not visible on the picture)
>
> Ge
Esa Heikkinen wrote:
>> The capacitance of the 1x probe is too high.
>>
>
> So I have to check that also: it shows 46 pF on 1x mode and 10.6 pF in
> 10x mode.
>
> Ok so the main question is that what kind of amplifier I should use with
> 10544A to get a clean signal, if it can't stand even a
Esa Heikkinen wrote:
>> Please provide a circuit schematic for your emitter follower buffer.
>> Include transistor types and component values as well as power supply
>> voltages.
>>
>
> 10nF DC-blocks at input and output, 4k7 pullup and 10k pulldown at the
> base, 180 ohms pulldown from the e
I also doubt that there could be something wrong with emitter follower
so I also did some tests with "capacitive coupler" build on bottom PCB
of the HP10544:
http://www.amigazone.fi/files/gpsdo/544coupler.jpg
(1 kohm. terminaton is not visible on the picture)
Generally it's just a wire going ove
It was always intended for factory repair only so a service manual may
not be readily available.
The schematic is comprehensive enough that one hardly needs one.
The tricky part is setting the oven temperature.
There's probably a description in the relevant HP Journal (probably
early 70's).
Bruce
> Please provide a circuit schematic for your emitter follower buffer.
> Include transistor types and component values as well as power supply
> voltages.
10nF DC-blocks at input and output, 4k7 pullup and 10k pulldown at the
base, 180 ohms pulldown from the emitter, 12V input voltage having some
Esa Heikkinen wrote:
>> New 10544A's have a somewhat cleaner output than that.
>> Perhaps something is wrong with the emitter follower.
>>
>
> Sorry I forgot to say that the oscilloscope picture was taken directly
> from HP10544A output, without emitter follower but with 1:1 probe,
> output
I have been able to find schematics of the 10544A but not a service manual.
Is there a service manual available?
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of Bruce Griffiths
Sent: Saturday, March 07, 2009 3:24 PM
To: Discussion of
> The capacitance of the 1x probe is too high.
So I have to check that also: it shows 46 pF on 1x mode and 10.6 pF in
10x mode.
Ok so the main question is that what kind of amplifier I should use with
10544A to get a clean signal, if it can't stand even an oscilloscope
without distortion on it
Esa Heikkinen wrote:
>> New 10544A's have a somewhat cleaner output than that.
>> Perhaps something is wrong with the emitter follower.
>>
>
> Sorry I forgot to say that the oscilloscope picture was taken directly
> from HP10544A output, without emitter follower but with 1:1 probe,
> output
> New 10544A's have a somewhat cleaner output than that.
> Perhaps something is wrong with the emitter follower.
Sorry I forgot to say that the oscilloscope picture was taken directly
from HP10544A output, without emitter follower but with 1:1 probe,
output terminated with 1 kohm. resistor. With
DO NOT use a 50 ohm termination as this may damage the output emitter
follower.
At the very least the waveform distortion will increase considerably.
The output stage isn't designed to drive 50 ohm loads.
Nor is it intended to drive large capacitances so use a 10x scope probe
to keep the load capac
I looked at your oscilloscope signal and it looks cleaner than mine but I
looked at mine at a slower sweep and both 50-ohm termination and 1-Megohm
termination.
Can you look at it on the oscilloscope with 50-ohm and 1-Megohm termination
and display several cycles?
I suspect we are seeing the same
Brooke Clarke skrev:
> Hi:
>
> I would like to have a way of measuring the multipath effecting my house GPS
> antenna both in terms of it's effect on position and on timing. Can this be
> done using the M12+T?
>
To some degree you can do this. It is a bit tricky since you need to
recall a fe
Hello..
> I tried to view the files on amigazone but was 'denied'.
Yes there's many network bans and all thanks for this belongs to couple
of spambots trying to scan the webserver at multiple IP's at same time.
I just changed the IP bans based on IP address where you send your mail.
You should
I tried to view the files on amigazone but was 'denied'.
Any way to get a look? Am I doing something wrong?
I tried with IE 7 and FireFox with no luck.
I have several 10544A's and they all put out a 10 MHz signal but it is sort
of a 'ramp like' wave as viewed on the oscilloscope that looks rich
Hi:
I would like to have a way of measuring the multipath effecting my house GPS
antenna both in terms of it's effect on position and on timing. Can this be
done using the M12+T?
--
Have Fun,
Brooke Clarke
http://www.prc68.com
___
time-nuts maili
Hello!
I got one of the 544's and plan to use it for rubidium cleaning loop
(Efratom LPRO). But I cannot get a clean 10 MHz signal out from it!
There are harmonics and spurious. I know that spurious come from oven
swicther so those should be easily handled with separate oven supply.
But the bi
In a message dated 07/03/2009 16:32:31 GMT Standard Time,
helmut.im...@t-online.de writes:
Please delete me from the email distribution list.
Thanks!
Helmut
___
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To unsubscribe, go to https://www.febo.c
Please delete me from the email distribution list.
Thanks!
Helmut
___
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi Eric,
> I'm looking for data on what appears to be a magellan oem GPS reciever
> which I removed from an older magellan aviation gps with moving map
> display (unit was circa 1998). The gps module I removed has "Magellan
> systems corp, Copyright 1994 10 channel OEM" silkscreened on the top
>
I'm looking for data on what appears to be a magellan oem GPS reciever
which I removed from an older magellan aviation gps with moving map
display (unit was circa 1998). The gps module I removed has "Magellan
systems corp, Copyright 1994 10 channel OEM" silkscreened on the top
side and a sticker o
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