[time-nuts] Help needed with Tracor 308A Rubidium Frequency Standard

[Bob kb8tq]

Hi

With any Rb, the first question is if the ovens are running and cutting back properly. There 
*should* be some sort of oven monitor settings on the switch. It’s a reasonable bet that < 1 hr
is needed to get them to cut back. The gotcha is that if they don’t cut back you start to fry 
components. 

Past that, the OCXO likely is a bit off frequency after many decades. Getting it tuned close 
to 5 MHz is a good next step. Past that, this is a big old 5065 sized beast, there’s a lot in it 
that could go wrong. 

Bottom line - you very much need a manual.

Bob

> On Feb 19, 2019, at 3:12 PM, Heinz Breuer via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hello to the group,
> out of an estate I got a Tracor 308A and plugged it in. As I already expected UNLOCK is lit. 
> 
> Well without any documentation I am lost. I hear a relay click every couple seconds and the uA meter starts at zero but current slowly increases and pegs the left stop (>50uA) after about 30 minutes. Neither the 10-turn control Magnetic Field nor the Frequency Fine control seems to have any effect. I have not yet touched coarse.
> 
> The Tracor 308A came out of an estate and the family claims to have no knowledge about it.
> 
> I hope the lamp is still good. Any idea how long it might take for the LOCK to come on?
> 
> Thanks for your help.
> vy 73 Heinz DH2FA, KM5VT
> 
> Von meinem iPhone gesendet
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