[Heathkit] No Grid Drive AT-1

[Ron Youvan]

   Buck W0LC  bfetters at aol.com wrote:

> Trying to revive an old AT-1.  Tubes checked okay, B+ is there.

> Get very very little grid drive.  About .2 ma.  Hardly moves meter.  Adjusting variable oscillator capacitor does little or nothing.  Get a watt or two output, so final seems to be okay, and when I dip final it seems to respond with slightly varying output.

> Checked voltages on oscillator, 6AG7.   All voltages okay except pin 4 the grid.  It's way off.  Chart says I should have -95 volts and I get less than a couple volts.

> Thoughts on where to check next?

   Try a set of tubes that work in another rig.  (or whatever)
-- 
    73 Ron KA4INM - All E-mail sent to this address shall linger in the Google cloud forever!