[time-nuts] 5370A vs 5370B

[Bob Camp]

Hi

Ok, the rest of the story:

I picked up a 5370B for less than the price of the 10811 inside it. The unit
powers up and appears to function at some level. All of the front panel
knobs are either busted or sheared off. Switches and buttons all seem to be
there and function (2 minute quick check).

I have it on a 3 day right of refusal. Popping the top to look inside voids
that (at least I believe it does). Shipping there and back is roughly half
of what I paid for the unit.

5370A's are pretty common out there. 5370B's not so much so. If I keep this
unit I'm trying to calibrate just what sort of adventure I'm getting started
on. I already have a number of them going on.

The goal is still to get this one up and running by "repairing" the front
panel pots. With 4 of them to fiddle that may or may not work out. Ideally
I'd like to have a 5370B when I'm done. Since A's are all over the place,
swapping parts with an A to get the B going is what I was considering. 

Of course if somebody has a little bag of magic dust that instantly repairs
things....

Bob



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of paul swed
Sent: Tuesday, March 09, 2010 8:49 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 5370A vs 5370B

I don't think thats true.
There would be a lot of common parts so the question is what are you looking
for?

On Tue, Mar 9, 2010 at 7:47 AM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> So a parts donor 5370B is a donor for 5370B's and not so much for a 5370A.
>
> Bob
>
>
> On Mar 8, 2010, at 11:37 PM, Bruce Griffiths wrote:
>
> > The input amplifiers also differ.
> > The linear input voltage range of the 5370B input amplifiers is greater
> than that of the 5370A.
> >
> > Bruce
> >
> > Chuck Harris wrote:
> >> Front panel, chassis, motherboard, and power supply appear to be the
> same.
> >>
> >> The CPU, ROM, and RAM boards were made into a single board.  There were
> >> some changes to the counting circuitry to make it more production
> friendly.
> >>
> >> The whole counter was sped up so that it could read at a somewhat
higher
> rate
> >> than the 5370A.
> >>
> >> -Chuck Harris
> >>
> >> Bob Camp wrote:
> >>> Hi
> >>>
> >>> How much of the 5370A was directly carried over into the 5370B?
> >>>
> >>> Bob
> >>>
> >>> _______________________________________________
> >
> >
> >
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