[time-nuts] Re: Sulzer 5B Quartz Frequency Standard Questions

[paul swed]

Yes you can take the outer  oven off.
As far as the other outputs go. I will only say that its all point to point
sort of.
I find it somewhat difficult to follow the physical from the schematic.
Good luck
Paul.
WB8TSL

On Sun, Mar 17, 2024 at 10:20 PM Stan via time-nuts <
time-nuts at lists.febo.com> wrote:

> I just purchased a 5 MHz Sulzer Model 5B quartz standard with a couple of
> known deficiencies. I'm new to the Sulzer world, and the design seems very
> different than the other standards I've encountered, so I have a couple of
> newbie questions:
>
>
>
> 1.      When I first got the standard, I heard a rattling sound from within
> the oven assembly. I removed a couple of covers and found a loose control
> nut that is a part of the fine frequency adjustment mechanism. It holds a
> metal tube in place on the rear bulkhead of the standard. I reattached the
> nut (there's only one place it could go) but have not closely examined the
> mechanism to determine how it is supposed to work. It seems that the front
> panel mounted fine frequency control turns a shaft with a threaded end that
> somehow interacts with this metal tube to move a copper rod with a
> cylindrical slip contact on the end forward and backwards. I assume that
> the
> metal tube is also threaded, but without taking it fully apart I can't
> tell.
> I also have no idea how this mechanism would adjust the fine tuning of the
> oscillator, so any advice on how it's supposed to work and what to look for
> in its operation is appreciated!
> 2.      The 5 MHz output works fine, although a few ppm high in frequency,
> but I cannot get the 1 MHz and 100 kHz outputs to work after pressing the
> divider start pushbutton. The only way to access the divider circuitry for
> troubleshooting is to remove the outer heater can (easily done). I assume
> that the oscillator and divider circuitry will run without the outer heater
> present, and that I won't damage anything by having the outer oven
> disconnected, but before I try anything I want to make sure.
>
>
>
> I located the schematics and service manual for the Sulzer 2.5 standard,
> and
> I think most of the info and the schematics are more or less directly
> applicable to the 5B, but if anyone knows where I might find an actual 5B
> service manual, I'd appreciate it.
>
>
>
> Thanks in advance,
>
> Stan
>
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