In a message dated 24/08/2011 00:03:19 GMT Daylight Time, [email protected] writes:
I don't think Racal released circuit diagrams of any of their ovens. I have traced out the circuit of the rapid warm up oven found in a lot of receivers, the 9442-12 and have fixed those, there is a ceramic cap that frequently goes wonky. The two 9420s I have fixed were just broken wires; they seem to have used PVC insulated wire which degrades... I haven't done the homework on those yet. The 9420s I have do have an EFC input as well as a stabilised Voltage out to feed it, and in the receivers I have that use it [RA1795] the fine setting is done from that, coarse setting from the top adjustment. ------------------------- Hi Dan I've taken a further look at the RA1794 manual and see now that it does confirm a fine tune pot being available when using the 9420. Having opened up this oscillator I find there are connections to every pin on the B7G connector so will assume until proven otherwise that it does meet the interface spec shown in the 1794 manual. I suspect the comments I've seen claiming most do not have the EFC option is more a case that in many installations it isn't used, which isn't quite the same thing. Thanks again for your comments. regards Nigel _______________________________________________ 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.
