[Boatanchors] Re: [Johnson] Carrier "warble" on Ranger Xmitter.

[SBJohnston@aol.com]

I once ran into troubles with instability in a Ranger something like what you 
describe.  I think it was quite bad when spotting but not as bad when 
transmitting at full power.  I believe it came down to a bad ground on the keyer 
subchassis that is mounted above the main chassis to the left of the VFO.  It 
didn't matter how tight I got the hardware - you could see the keying output 
voltage jump around on its own and it seemed to jerk the VFO as well.   At times I 
also had ac modulation on the VFO signal - it was due to the keyer filament 
return having the same poor ground path and it was getting on the keying voltage 
and thus into the other stages.

I finally had to run an additional ground wire down thru the existing harness 
to ensure the common ground point of the subchassis down to the nearest 
ground under the main chassis.

Steve WD8DAS

sbjohnston@aol.com



--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment.  Attachments are not allowed.  To learn how
to post in Plain-Text go to: http://www.expita.com/nomime.html  ---