[Central-Electronics] updates, musings and questions...

[Jim Candela]

Eugene,

   Thank you for sharing your experiences. I don't have a 100/200V, but
in general I'd consider swapping the VFO tube, and select from several
of them. The filament voltage may be part of the problem if the oxide
cathode is mostly used up, and reserve emission is gone. I have done
this with the BC-458 for the 20A, and some 1626 oscillator tubes are
fine when varying the filament from 10-14 volts (12.6 v nominal), and
others shift frequency dramatically with a small change in voltage. The
latter type goes in the dumpster.

   You might need to replace all the passive components as well in the
VFO. I'd start with the resistors first. There are others on this group
that are more into your VFO, and they can offer more insight than me.

Good Luck,
Jim
WD5JKO