Don, As a Central Electronics 20a user I have two BC-458's converted to be used as a vfo for the 20a. I have a strange problem with one of these, and I am hoping the group has some experience with this. On one of these BC-458's the tuning knob apparently has backlash. When zero beating a carrier, the VFO is erratic while tuning. Once you find a zero beat the thing is stable. I also noticed that this problem gets progressively better with the VFO tune "lock" tightened down until the VFO knob is pretty hard to turn. The mechanisms are fairly simple, but I fear the solution may not be. Anybody with Command transmitter experience have any input with this problem?
Regards, Jim WD5JKO --- Merz Donald S <[EMAIL PROTECTED]> wrote: > For Sale > > R-11A receiver. This is form the post-war command > set series that is painted gray and has no local > tuning controls. The R-11A is the one that covers > 190kc-550kc. This one has had 2 of the front panel > connectors removed. But it is otherwise complete, > and aside from a few paint chips, looks good. Uses > 85kc IFs just like the original. $21 > > BC-459A Transmitter parts set. This covers 7-9.1mc. > Black wrinkle. It has a goodly number of ham mods > including several unoriginal front panel holes. It > has no tubes and the snap-on tube cover is missing. > The roller inductor is present--but the little arm > with the roller is missing--go figure. The nicest > thing about it is that that black wrinkle cover that > encloses the chassis is all original and in > excellent condition. This radio has restoration > potential or use as a parts set. $15 > > BC-454-B 3-6mc receiver. Aluminum. This has beaucoup > ham mods but no unoriginal front panel holes. It is > missing the snap-on tube cover. The dynamotor and > rear connectors are original but the dyno connector > pins have been soldered-to. With all tubes and > coils. $18 > > 3-pin modulator power connector for the MD-7/ARC-5. > Probably also works with the Army version. Has a > short 2 foot cable. $10 > > 8-pin connector for the ARC-5 remote control boxes > with 3 foot laced cable attached. $8 > > A stack of junked-out 3-6mc ARC-5 and ARA receivers > for parts. Some are missing coils, some missing > tubes. All are drilled and cut quite a bit. $5 each > > Command set crystals--for calibrating the > transmitters. these are the ones that look like > metal tubes with a little "hat" used as a pull. Let > me know what frequency you need. $3 each. > > Thanks for looking. > 73, Don Merz, N3RHT > > The information contained in this e-mail may be > confidential and is intended solely for the use of > the named addressee. > Access, copying or re-use of the e-mail or any > information contained therein by any other person is > not authorized. > If you are not the intended recipient please notify > us immediately by returning the e-mail to the > originator.(A) > ______________________________________________________________ > AMRadio mailing list > Home: > http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net >
