Four nights ago, I hooked up one of my Z3801A's for the first time in
over three years. When I last had things up and running, I was just
getting into trying to understand how these devices work. Since then,
I have forgotten much of what little I learned back then. Knowing the
level of expertise
Hi all,
I've just found eBay item nr. 37029876, which lists a Option 03 clone for
the popular 53131A 53132A counters. I remember someone was also working on
this, from a thread a few months ago.
My current counter is a 1Ghz 5385A (any comments on it?) so I don't needed, but
I
Well, we know I can't count, now :-) In my previous message I said
that the GPSDO had been running four days. I meant two days. It's late
and I should be in bed. That's my excuse and I'm sticking to it.
Joe Gray
KA5ZEC
___
time-nuts mailing list --
Hi,
There's a subtle difference between 3rd phase detectors in the 74HC4046A
(Philips/NXP, ON, TI) and the 74HC4046 (Fairchild, NS)
The 3rd Phase detector in the 74HC4046A works as the designer intended
in the GPSDO circuit, the 3rd phase detector in the 74HC4046 does not.
The 74HC4046 uses
The old King Radio (then Bendix-King now part of Honeywell) Silver crown
aircraft radios used 4046's in some of the synthesisers. The one in the VHF com
had a different King part number to that in the ADF (MF direction finder).
While trouble shooting we tried an ADF chip in a VHF (didn't have
Margina design? ;) Better said, very poor design.
Does not sound very good that same part, same lot code, sometimes work
here but not there, sometimes does not work at all... Extending it a
bit... sometimes will work at a given temperature, sometimes will not at
a given other.
Regards,
On 9/27/09 7:22 AM, Javier Herrero jherr...@hvsistemas.es wrote:
Margina design? ;) Better said, very poor design.
Does not sound very good that same part, same lot code, sometimes work
here but not there, sometimes does not work at all... Extending it a
bit... sometimes will work at a
I just acquired an SR620 that looks to be in excellent condition. I've
noticed something in its operation and I'm not sure if it represents a
problem, a calibration issue, or if it's just a feature.
Yesterday, after letting the counter warm up for an hour, I calibrated the
10 MHz timebase and
There's a bit of info on the 05061-6174 in the manual updates at the
back of Part 3 of the 5065a manual that Brian Kirby uploaded to
http://www.kennethkuhn.com/hpmuseum/scans/ .
Ed
Christopher Hoover wrote:
Anyone have schematics for the 05061-6174 00105-6044 boards? These
are used to
I, very much, have to agree with Rob. There is no place on this group
for nation/political bashing.
Had
K7MLR
At 10:56 AM 9/26/2009, you wrote:
Dave,
Your comments are both unwise, unnecessary, and downright rude to the many
members of this group.
As someone who was born in England,
I'd be interested in getting that info. I have a 105B that uses a
00105-6100 assembly which consists of 00105-6044 and 05061-6165 boards.
Ed
ewkeh...@aol.com wrote:
I have info on Part# 055061-6170 with boards 0561-6166 and 6165. Was
replacement for the 105. Bert
In a message dated
Yes, of course, some applications needs the parts that are in the better
side of the distribution curve for a particular parameter and for a
particularly stringent application, as you mention :), but I think that
a 4046 seems a part that should not have to be so critical that even in
the same
The only portion of the device with possibly significant variability is the
VCO. If the design does not take care of the VCO variability, for the
capture range of the PLL; things may not work.
If the device had a Phase-Frequency detector, instead of a phase detector,
the capture range would not
On 9/27/09 9:54 AM, Javier Herrero jherr...@hvsistemas.es wrote:
Yes, of course, some applications needs the parts that are in the better
side of the distribution curve for a particular parameter and for a
particularly stringent application, as you mention :), but I think that
a 4046 seems
Yes, I'm also familiarized with space qualified EEE components, and
lately I hear the word heritage more frequently that I would like ;)
The only design I've made for aircraft electronics was for a commercial
aircraft application, and the components selection was a lot less
restringent than
I've started an interesting discussion! I don't know the details of King's
selection process, it may have been that that batch would work in either
application. Light aircraft avionics designs can be quite interesting. Older
designs (I've not looked at any recent ones) would oftrn use chips
Javier Herrero wrote:
Yes, I'm also familiarized with space qualified EEE components, and
lately I hear the word heritage more frequently that I would like ;)
The only design I've made for aircraft electronics was for a commercial
aircraft application, and the components selection was a lot
Stan.
Calibrating the units timebase per page 76 of the manual you can
manually
adjust the calbyte 4 word until the counter averages zero offset plus
minus around the 5Mhz.
You will still have the .0060 bias but it will plus and minus 30.
Corby Dawson
Corby,
Corby Dawson wrote:
Stan.
Calibrating the units timebase per page 76 of the manual you can
manually
adjust the calbyte 4 word until the counter averages zero offset plus
minus around the 5Mhz.
You will still have the .0060 bias but it will plus and minus 30.
This
The part might look wrong without this information. One case was a 3.15A
fuse in series with a 27R resistor at the 28V supply input. The fuse can
never blow (no the aircraft didn't have 115V 400Hz supplies).
The reason was a pater exercise to obtain intrinsic safety approval without
formal
Stan,
Stan wrote:
I just acquired an SR620 that looks to be in excellent condition. I've
noticed something in its operation and I'm not sure if it represents a
problem, a calibration issue, or if it's just a feature.
Yesterday, after letting the counter warm up for an hour, I calibrated the
10
On 9/27/09 1:54 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote:
Javier Herrero wrote:
Yes, I'm also familiarized with space qualified EEE components, and
lately I hear the word heritage more frequently that I would like ;)
The only design I've made for aircraft electronics was for a
Joseph Gray wrote:
From looking at the EFC graph, I assume that even after almost 48
hours, the GPSDO hasn't yet reached it's best performance (correct?).
The PU at this time 3.4uS. I understand that this is a prediction for
the next 24hrs if GPS lock is lost. The question is, what does the
I have the schematic of the 05061-6198 and 05061-6199 which are the power
supply board for the 10811 and the frequency divider and amplifier used in
the 5061B that essentially serves the same purpose, I think. The original
105B and 5061A used the same 5 MHz oscillator and the later 5061A's and
Jim,
Lux, Jim (337C) wrote:
Design AND component...
Easy to claim heritage if all you do is change a resistor or a capacitor.
Tougher to claim if you change the active components, particularly if it's
functionally different (e.g. Substituting a 2n3904 for a 2n isn't a huge
deal.. Changing
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