[Johnson] Valiant chirp
Al Parker
anchor at ec.rr.com
Tue Dec 4 21:20:12 EST 2007
Hi folks,
I know Valiants & Rangers chirp at least sometimes. Mine only chirps on
40m. I know the dropping resistor in the VFO VR tube line, 18K I think?, is
common trouble, I've done that on a cupl, and in this one, tho' I used a 5w
22k, mounted outside the box. I've adjusted the keying pot, even tried it
at both ends, but it's sitll close to where a prev. owner had marked it to
be when adj. properly. I've got some ferrite beads on the leads into the
VFO.
This thing only chirps on 40m. I've tried all other bands, tried
changing the exciter tuning. I fussed with this rig for about 2 months b4 I
decided it was OK to put it back in the cabinet last week. Worked the 160
contest this weekend, of course you're not going to get anything other than
599 in a test, but it sure sounds pretty on the rcvr everywhere except on
40m It does flatten out when I cut the final plate current down below 50ma
by dropping the drive & letting the clamper do it's job. So, it's either RF
somehow doing it, or voltage drop, or ??? If that 22k has too much drop,
why only on 40M?
Looking for suggestions b4 I haul it out of the cabinet, not a fun job.
thanks, 73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammarlund.info
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