[Heathkit] Sick AT-1

[Glen Zook]

That is about right for the output from an AT-1.  Heath's original specifications said "up to 35 watts input".  However, Heath was also pretty optimistic about the input power to a lot of their equipment.  Maybe 35 watts on 80 meters with a VERY "hot" tube.

The efficiency of the 6L6 at r.f. wasn't that great, especially on the higher frequencies.  You have to remember that when the AT-1 was manufactured the FCC regulations stated INPUT power, not output power.  Therefore, it didn't matter what the efficiency was where FCC regulations were concerned.

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 1/20/10, bfetters at aol.com <bfetters at aol.com> wrote:

Brought an AT-1 back to life a few days ago.  Cleaned switches, changed out tubes, etc.
 
Unit gets output on all bands. . .but only about 10-15 watts.  Tried changing out 6L6 and also oscillator.  No results.
 
Changed crystals, no luck.  Any thoughts/ideas of where I should look next?