[time-nuts] FTS 1200

WB6BNQ wb6bnq at cox.net
Fri Aug 10 00:28:33 UTC 2012


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


EWKehren at 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,
> bg at 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,
> > lists at 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,  EWKehren at 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,
> >> bg at 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 at 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 at 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 at 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 at 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 at 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 at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.





More information about the Time-nuts_lists.febo.com mailing list