[BC] AM Plate Modulation Concept

[nakayle@gmail.com]

 Thanks for the correction Richard.   I recall Heath had a CW-only xtmr
similar to the DX-40 but guess I was wrong about the number.  That was a
long time ago!   My dream was getting the big daddy DX-100 plate-modulated
rig.   Must have weighed 200 pds!   Ah those were the days!  :-)

On 2/23/06, Richard Fry <rfry at adams.net> wrote:
>
> Nat Kayl wrote:
> >Don't you mean the DX-40?  As I recall the DX-35 was CW-only.
> __________________
>
> Actually I was the one posting that statement.  The DX-35 did use
> controlled carrier AM.  I bought, built and used one in the mid 1950s, so
> I'm real sure about that.  The DX-40 did also - it superseded the DX-35 in
> ~ 1958.
>
> Below is a write-up I pulled off a Google search:
>
> DX-35: Heathkit DX-35. Crystal-controlled phone & CW transmitter. 6146
> final amplifier providing 65 watt plate power input on CW, with
> controlled-carrier modulation peaks up to 50 watts on phone. Built in
> modulator and power supplies, covers 80, 40, 20, 15, 11, and 10 meters
> with
> a single band-change switch. Pi network output. Tubes: 12BY7 oscillator,
> 12BY7 buffer and 6146 final. Speech amplifier 12AX7, 12AU7 is used as
> modulater. Panel control: switch selection of three different crystals
> (reached through access door at rear). Panel meter indicate final grid
> current or final plate current.
>
> RF
>
>
>
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