OK John - yes that does sound different, and the clues look quite strong! I offered the info on the basis that many manufacturers tend to use a fairly standard pin-out - but maybe not this time!
73, Dave ----- Original Message ---- From: John Miles <[EMAIL PROTECTED]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Sunday, 7 October, 2007 12:27:00 AM Subject: Re: [time-nuts] Ovenaire OCXO pinout needed Hi, Dave -- That doesn't sound entirely comparable to this one, unfortunately. I do have a partial clue: the seller left about a centimeter of wire on each of the 6 terminals. They are: 1 Gray 2 Pink/black 3 Bright red 4 Clear (RG174 center conductor; likely the output) 5 Ground (bonded directly to metal can) 6 Either an EFC reference or oven ground (insulated but jumpered to pin 5) The OCXO from the Tek analyzers uses several different supply voltages (+17, +15, and +5). I'd guess this one wants to see similar voltages, but I'd rather not put +17 and +15 volts on randomly-chosen pins and optimize for minimum smoke. I could always compare impedance/resistance readings with the one in my Tek SA, but that wouldn't tell me anything about the required supply voltages even if it did help determine the pinout. -- john, KE5FX > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Behalf Of dave powis > Sent: Saturday, October 06, 2007 3:56 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Ovenaire OCXO pinout needed > > > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > 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. > > 73, > Dave, G4HUP / ND8P _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
