Since my B-line has been operational, I started on refurbing the C-line,
starting with the T4XC & AC-4. I installed another of Paul's upgrade kits in
the AC-4. Cleaned up the T4XC and looked everything over.
When I fired up the T4XC on the bench (separate, no rcvr), thru my Bird 43 and
my 200W, 30db attenuator with an additional 20db pad on the end of it that I
use as a load. The xmtr show output on 7, 14, & 21 bands but the RF tune peaked
in the wrong places (not in the band). I hooked up the freq. counter and found
the frequencies to be way off. EX: the 7 mhz peak was at 5.6 mhz. There is an
accessory xtal installed for 28.0 mhz in position 1 and when switching to that
position with the XTALS switch, everything worked normally. The RF Tune peaked
at the correct spot and the counter read correctly. I found that the wafer of
the Band Switch that switches the band xtals showed an open, the common
terminal (wiper). It all looked good but showed open. I applied Deoxit with a
Q-tip and everything started to work normally. I've found intermittent
connections before but never a "full open", especially when the switch looks
all OK. It was reading in the megohms!
Anyway, apparently the T4XC is OK and I'll start on the two R4Cs.
73, Stew K3ND___
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
