I have a bad 10544 (received from AST) that I am planning to look into.
No 10 MHz out and very low 12 VDC current.
Has anyone the translation from HP PN to Commercial equiv for the
semiconductors ?
Thanks
Les
Lester B Veenstra
M0YCM K1YCM K1YCM/6Y5
Mail Address:
Lester Veenstra
CORRECTION
Judging from the oscillator and oven controller voltage ranges Tom's
scanned circuit is actually for the later production models of the
10544A with the improved phase noise specification. The input signal to
the oscillator buffer cascode was probably somewhat smaller than 76mV
rms
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time-nuts
Lester Veenstra M0YCM wrote:
I have a bad 10544 (received from AST) that I am planning to look into.
No 10 MHz out and very low 12 VDC current.
Has anyone the translation from HP PN to Commercial equiv for the
semiconductors ?
Thanks
Les
Lester B Veenstra
M0YCM K1YCM
Lester Veenstra M0YCM wrote:
I have a bad 10544 (received from AST) that I am planning to look into.
No 10 MHz out and very low 12 VDC current.
Has anyone the translation from HP PN to Commercial equiv for the
semiconductors ?
Thanks
Les
Lester B Veenstra
M0YCM K1YCM
QSL
Lester B Veenstra
M0YCM K1YCM K1YCM/6Y5
Mail Address:
Lester Veenstra
PSC 45 Box 781
APO AE 09468
Telephones:
Office 940-6456
Office +44-(0)1423-846-385
Home: +44-(0)1943-880-963
UK Cell +44-(0)7716-298-224
-Original
True, the 10811 does not have a switching regulator for the oven circuitry.
John WA4WDL
- Original Message -
From: Jason Rabel [EMAIL PROTECTED]
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Saturday, February 03, 2007 11:08 AM
Subject: Re:
Since several of you have mentioned the 10811, or how
the 10544 differs from the 10811, you will find the original
HP Journal article about the 10811 very informative. See
pages 20 to 29.
http://www.hparchive.com/Journals/Low-Resolution/HPJ-1981-03-Low-Resolution.pdf
(4.5 MB)
Dr Bruce Griffiths said the following on 02/02/2007 06:29 PM:
Since the MAX477 has an input noise of around 5nV/rtHz at 10MHz compared
to around 1nV/rtHz for a low noise bipolar transistor, the MAX477 may be
expected to be have a phase noise floor of up to 14dB higher than that
of an
This question had come up a few weeks ago. The
service manual says not to power up the oven when
the 10811 is disassembled for service. I talked
to Dave Montgomery, former head technician on the 10811
line from its begining around 1980 until its end
a few years ago. He said that it is OK to
Hi,
This would be my mail on the list after a looong break. Hope everyone is fine.
Can anyone tell me, how important is timing for network synchronization ( i am
looking forward to some quantitative values), how much accuracy is expected
from timing references, especially GPS and what are the
There are two versions on
http://www.megapathdsl.net/~hmurray/tmp/
They will be there until I need the space which will be at least a week or
two. If somebody has a good home, please grab them.
The big one is 16+ MB. That's what somebody sent me a year ago. Thanks
again.
The small one
They will be at http://www.ko4bb.com/ham_radio/Manuals/1_GPS_Stuff
Thanks
Didier KO4BB
Hal Murray wrote:
There are two versions on
http://www.megapathdsl.net/~hmurray/tmp/
They will be there until I need the space which will be at least a week or
two. If somebody has a good home,
John Ackermann N8UR wrote:
I had a chance to measure a TADD-1 using an HP-3048 phase noise system
last year. I've attached a screen shot of the results; in short it was
below -140dBc/Hz from 100 Hz on out (by the way, I'm not sure I would
trust the noise floor shown in this test; I am not
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