[Boatanchors] De-chirping a Globe Chief Deluxe?

[Glen Zook]

My original Globe Chief 90A and my present Globe Chief 90A, which are the same basic circuit as the Globe Chief Deluxe except for the 160-meter band coverage, had/have absolutely no chirp problem.

I would check the choke in the 6AG7 cathode circuit to ground.  It may have been removed which was done for proper VFO operation.  Also, some people have added like a 470 pf capacitor in parallel with this choke.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 12/27/10, Charlie Cheney <ccheney3686 at charter.net> wrote:

I'm trying to set up a couple of operating stations for SKN including a  Globe Chief Deluxe / 75A3. Problem is, the Chief has a noticeable chirp.  I'm using good FT-243 xtals. Checked the PS and the filter cap seems to  still have its original value, and I'm using grid block keying as the  manual recommends.
 
I realize it's a low-end xmtr but there is a certain charm in communicating with a flea market ugly duckling. Said charm does not  however extend to getting a notice from the FCC due to a bad signal.
 
Before I give up on it, I thought I would seek advice from this group. Did these things chirp right out of the box? Any ideas (general or specific) for cleaning it up? I thought about tossing together an external oscillator with its own PS and running the Chief in VFO mode but that's kind of like cheating. Guess alternatively I could provide external power to the 6AG7 (and at the same time back down the plate and screen voltages quite a bit). Or replace the 5U4 with diodes and use the socket for an OD3?