[time-nuts] Ovenaire OCXO pinout needed

dave powis g4hup at btinternet.com
Sat Oct 6 18:56:12 EDT 2007

Hi John,

I don't have this particular OAM Unit - I have a model 42-23 - but I do have the pin-out for it, and it sounds very similar to what you describe, so maybe this will be helpful.

Viewed from above - ie as you would look down on it when on a board, with the pins to the left of the unit, they read from top to bottom as:

1    EFC IN - feedback from 10k trimpot for manual adjustment of Freq out
2    EFC REF - source voltage for 10k pot, hot end - cold end left open.
3    VCC +12v  -heater supply?
4    GND
5    RF Out
6    VCC +10v - Osc supply?

I expect your unit uses the same arrangement, but at least this should give you something to experiment with.

Dave, G4HUP / ND8P

----- Original Message ----
From: John Miles <jmiles at pop.net>
To: time-nuts at febo.com
Sent: Saturday, 6 October, 2007 9:42:27 PM
Subject: [time-nuts] Ovenaire OCXO pinout needed

Does anyone have access to the schematics for a Gigatronics 1026 signal
generator (50 MHz - 26.5 GHz)?  If so, any chance you could look up the 10
MHz OCXO's pinout for me?  I just picked up the OCXO from someone parting
out a 1026, but have no other information on it, and I'm guessing the only
hope for a pinout is to look in the original equipment's service manual.

This is a nice-looking Ovenaire unit, similar but not identical to the one
used in later-model Tek 49x spectrum analyzers.  The model # is OSC 49-68.
There are six terminals coming out of it, but that's about all I can tell.
Thanks in advance for any info!

-- john, KE5FX

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