I'm looking to buy either an HP 5370B or SR620 counter. I can probably get the
HP unit for less money but don't mind paying more if the SR counter is
definitely better for Time Nuts type measurements (e.g. Allen Deviation).
Thanks!
Jim Hall W4TVI
___
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
Don't underestimate the 5
the
5335A seem to be similar.
Roy
- Original Message -
From: "Jim Palfreyman"
To: "Discussion of precise time and frequency measurement"
Sent: Tuesday, May 19, 2009 10:35 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
I have a 5370B and love it.
It's big,
gt; time-nuts@febo.com>
> Sent: Tuesday, May 19, 2009 10:35 AM
> Subject: Re: [time-nuts] HP 5370B vs SR620
>
>
>
> I have a 5370B and love it.
>>
>> It's big, and postage to Australia was as much as the unit itself, but
>> what
>> it can do - espec
Jim Palfreyman wrote:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
D
19, 2009 7:20 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370B vs SR620
>
> Jim Palfreyman wrote:
> > I have a 5370B and love it.
> >
> > It's big, and postage to Australia was as much as the unit
> itself, but
&g
Roy,
The 5370s have a few quirks that you should know about to avoid
possible surprises. These aren't newly discovered & have been the
subject of various postings a few years ago.
1) Both instruments have some front end coupling with the data path
& the timebase. This was mostly corrected in
In message <54d2d91a9dd3422b80f4f02de65e9...@d400>, Didier Juges writes:
>I have two 5370A but no 5370B, so I cannot comment on practical differences,
>beyond the catalog specs.
I belive there is a difference in the input circuitry also, I recall
that the B has a more capable input section than t
Pete
Thanks for the information.
Regards
Roy
- Original Message -
From: "Pete"
To: "Discussion of precise time and frequency measurement"
Sent: Tuesday, May 19, 2009 3:27 PM
Subject: Re: [time-nuts] HP 5370B vs SR620
Roy,
The 5370s have a few quirks that you
According to the 1986 catalog, the 5370B is capable of 6000 readings per sec
in the fast binary mode.
According to the 1983 catalog, the 5370A is capable of 6000 readings per sec
in the fast binary mode.
In 1992, they upped the spec to say: "up to 8000 readings per second" in the
fast binary mod
Poul-Henning Kamp wrote:
In message <54d2d91a9dd3422b80f4f02de65e9...@d400>, Didier Juges writes:
I have two 5370A but no 5370B, so I cannot comment on practical differences,
beyond the catalog specs.
I belive there is a difference in the input circuitry also, I recall
that the B has a more c
There is an interesting application note on the differential linearity
issue. Apparently the problem was found by a Tektronix engineer, and HP
provided a correction to fix the problem in the 5370A. That correction,
I believe, is available on Bama.
-Chuck Harris
Pete wrote:
Roy,
The 5370s have
> As to the socket issue, my 5370A has been dead reliable. No problems at
> anytime.
>
> I think your socket issue is unique to your unit, or perhaps the
> series your
> unit came from.
I've heard of socket failures happening on at least one 5370A besides
Didier's, but I don't think it's reached
Jim Palfreyman skrev:
I have a 5370B and love it.
It's big, and postage to Australia was as much as the unit itself, but what
it can do - especially given its vintage - makes it a perfect unit for my
rack!
And the manual (plus people here) make it really great if there are ever any
problems.
D
Roy Phillips skrev:
Jim
I was interested to hear that you are very fond of your vintage Counter
(HP5370B), and I have downloaded the manual from the Agilent website.
I recently purchased an HP 5335A, again a vintage model, and I have yet
to assess it completely - is the 5370B much superior ?
Hej Magnus
One issue is that the SR620 is still in production.
Thus obtaining spare parts may be a little easier than for the HP5370A.
Bruce
Magnus Danielson wrote:
> Roy Phillips skrev:
>> Jim
>> I was interested to hear that you are very fond of your vintage
>> Counter (HP5370B), and I have do
No I haven't. What does this mod do?
2009/5/20 Magnus Danielson
> Jim Palfreyman skrev:
>
>> I have a 5370B and love it.
>>
>> It's big, and postage to Australia was as much as the unit itself, but
>> what
>> it can do - especially given its vintage - makes it a perfect unit for my
>> rack!
>>
>
Hi John,
I know that socket problems in the 1970's could be a real
bear, but most of them started very early in the life of
the product. For instance, I had heard about smacking
Apple I memory on the table to fix problems by the time
they had been out for only a couple of years.
Maybe my 5370A
Bruce Griffiths skrev:
Hej Magnus
One issue is that the SR620 is still in production.
Thus obtaining spare parts may be a little easier than for the HP5370A.
Also, most of the parts for a SR620 is stock parts and not very hard to
come by. The oscillator-circuits in the 5370A/B is much harder
Jim Palfreyman skrev:
No I haven't. What does this mod do?
Disabling the 10 MHz presence detector that spews out wideband 5 MHz and
lots of overtone noise on among other things the 10 MHz output.
I did a very simple short which brings one of the transistors out of
bias and thus disabling th
Bruce/Magnus
Thank you for your comments.
Roy
- Original Message -
From: "Bruce Griffiths"
To: "Discussion of precise time and frequency measurement"
Sent: Wednesday, May 20, 2009 12:42 AM
Subject: Re: [time-nuts] HP 5370B vs SR620
Hej Magnus
One issue is tha
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