Was unable to adjust to 5Mhz, 4.9999752 was the best I could get with external pot. Internal pot has no effect, assume it is disconnected when external is present ? Was not hard to dissemble, the oven is not warm but has 29 volts maybe problem in the control circuit. Does anyone have any info I could use ?
I have downloaded a 4040B operation manual but it is not that similar to the 4040. This unit uses a 1802 RCA microprocessor so is much older than the B model, think it uses a 68xx type processor. I have no manuals for the FTS-4040 and been unable to connect a PC to the 9 pin monitor/sync connector on the back, I need the pin out and perhaps a older monitor program as I only have monitor 2 and monitor 3 programs. What I can see of the ocxo outside: Has 2 SMA RF out connectors and a 9 pin D connector inside: Oven was inside a glass vacuum bottle with layers of foam insulation to close one end. 2 MTH15N20 transistors to heat the oven temp sensor on a small separate pc board part #56219-03909 REV A attached to oven main board not insulated is part # 56219-06802-00 REV D _______________________________________________ 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.
