[Heathkit] Heath AT-1 Question

[John Harden, D.M.D.]

During the late 1950's two friends of mine (W4UUH, now SK, and his son 
John, K4AFP, now W3CM) ran the AT-1 (with homebrew plate modulator and 
Heath VF-1) and certainly did not get more than that to the antenna!! 
They used a 4 element monobander with a folded dipole driven element and 
fed it with 300 ohm twin lead on 28 MHz. Their receiver was a National 
NC-57 with an RME VHF-152A converter.

During that awesome sunspot cycle 10 meters was solid QRM from one end 
of the dial to the other. I've not heard anything like it since!!! There 
were a lot of hams then who ran the AT-1 and the VF-1. There were also 
many who used a single 6L6 as a stand alone xtal oscillator. The 1960 
Radio Amateur Handbook shows the 6L6 as a Class A amplifier with rated 
outputs from 6.5 to 10.8 watts with 250 to 350 volts on the plate. I 
believe Heath had it in a class C configuration?

73,

John, W4NU
Atlanta
(K4JAG  1959 to 1998)

Glen Zook wrote:

>Considering the final tube in the AT-1 (6L6) I
>wouldn't expect much more output.
>
>Glen, K9STH
>
>
>--- KH6ITY at aol.com wrote:
>
>Only problem seems to be low  output. I get about 10
>watts output. Does anyone know the average output on 
>40 meters for the AT-1 ? 
>
>=====
>Glen, K9STH
>
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