[time-nuts] Efratom Rubidium SPTB-100/LN-001 info wanted

[Jerome Peters]

Thanks Rex, this is terrific information!
It is awfully kind of you to take the time effort to write up and post the note.  
I'm all set now.

The generosity of the Time-nuts community if very inspiring.

Jerome
AF6UX

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Rex
Sent: Thursday, December 05, 2013 4:35 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Efratom Rubidium SPTB-100/LN-001 info wanted

I have an SPTB-100. It seems to be a custom version of a standard
FRK(LN) rubidium for Tektronics.

I got mine around 2000. (Mine is an 88 date-code vs. your ancient 86
version.) It didn't work initially because the internal Xtal oscillator wouldn't sweep through lock frequency. Changed a cap in the oscillator and it worked again. I've only powered it up a few times; I assume mine is still working. I was told it is low-noise for a rubidium.

Somewhere locally, I got a copy of a manual for it. Other than the cover page, it seems to be a standard FRK manual, which the KO4BB pages already have. Today, I made a short PDF with a scan of the cover page and a few notes I wrote up.

You can get it here:
http://www.xertech.net/pub/SPTB-100%20notes.pdf

I also uploaded it to KO4BB for future references.

If anyone knows more or sees any problems with what I wrote up, please let me know and I'll correct or update.

-Rex KK6MK


On 12/4/2013 7:08 PM, Jerome Peters wrote:
> Hello,
>
> Can anybody shed some light on this particular model:
> Model - SPTB-100/LN-001
> Efratom part No. 703-200-11
> Date Code 8609
>
> (I have looked at K04BB's website, it has lots of other models, but not this one).
>
> Thank You,
> Jerome
> AF6UX
>
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