Bill Grounded pin, works and stays on frequency. Bert In a message dated 8/9/2012 8:29:08 P.M. Eastern Daylight Time, wb6...@cox.net writes:
Hi Bert, My guess would be a bad (shorted maybe?) Varicap. Does it go out of oscillation if you just ground the efc pin ? Bill....WB6BNQ ewkeh...@aol.com wrote: > Bjoern > No EFC. The moment I even put a small Voltage like 0.9 V through a 33 K > resistor on pin 2 it quits oscillating. > Bert > > > In a message dated 8/9/2012 8:07:24 P.M. Eastern Daylight Time, > b...@lysator.liu.se writes: > > Hi Bert, > > So the EFC does not work at all? (or did I miss something obvious?) > > /Björn > > > The unit starts high and over 20 minutes comes down to 4.9999975 with 0 V > > on the EFC. Any voltage on pin 2 and it quits oscillating. > > Bert > > > > > > In a message dated 8/9/2012 7:06:48 P.M. Eastern Daylight Time, > > li...@rtty.us writes: > > > > Hi > > > > As the unit warms up, you should be able to tell weaner it starts off > > above 5 or below 5 MHz. There are enough different crystal cuts that > > *might* be > > in there that checking it at turn on is the easy approach. If it starts > > low and is off low, the heater may be the issue. > > > > Bob > > > > On Aug 9, 2012, at 6:53 PM, ewkeh...@aol.com wrote: > > > >> Bjoern > >> No not able to tune it to 5 MHz. > >> Bert > >> > >> > >> In a message dated 8/9/2012 6:48:59 P.M. Eastern Daylight Time, > >> b...@lysator.liu.se writes: > >> > >> Hi Bert, > >> > >>> I have a FTS 1200 that is off by about 2 Hz. Have decided to take > a > >>> closer look. Does any one have technical Information I should study > >>> before I > >>> open it up. > >>> Thanks > >>> Bert Kehren > >> > >> The efc range on my FTS 1200 goes from about -1.5Hz to +2Hz (0V to > > +10V). > >> Is your FTS1200 of even with max (or min) efc voltage? > >> > >> -- > >> > >> Björn > >> > >> > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to > >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > >> _______________________________________________ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >> and follow the instructions there. > > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.