[Heathkit] Sick AT-1

[Donald Spoon]

I built one of those around 1955 or so!  From my memory (poor), I am 
thinking that was about all you could get from a "stock" AT-1.  On 10 
Meters the 6L6 was wired as a Frequency Doubler, so the power out was 
even less... on the order of 5-7 watts.  You might want to check the HV 
to the plates of the 6L6... it should be around 425 V.  IIRC you loaded 
it up to 80 milliamps.

Shortly after I built mine and put it on the air as a Novice, there was 
a QST article on a "modification" that was supposed to increase the 
power output.  As I recall, it replaced the 6L6 with another tube.. a 
6BQ6 maybe??...  and did some surgery on the coils so the final was run 
"straight-through" on all bands.  It  had a "variable cap in series with 
the link coupling on the final so it could be matched to other than 52 
ohms.  I did the mod and it "worked" as advertised. 

Ah... memories!

-Don Spoon-
K0APK

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?
>
> Thanks much.
>
> Buck
> W0LC
>