[Heathkit] help with DX-40

[Wayne Hoskins]

Perhaps a weak driver (it's a 6CL6).

A few questions:
- What band(s) does it do this on?
- How much grid drive is available on that band? (scale is 1-6 ma)
- Xtal or VFO?  If VFO, perhaps that could be weak or wrong.
- If xtal, are you running it on fundamental, or on what harmonic?

You should be able to get upscale grid drive on all bands.  If less 
than half-scale, that says (if you're using a xtal) that either the 
oscillator or driver (both 6CL6s) is weak.

If you have sufficient grid drive, that points to something wrong in 
the final amplifier section.

Just re-reading your question, is that AM voice peaks or CW you're 
talking about?  I read it as CW -- but if it tunes up fine with full 
carrier, then everything above is moot; the speech amp could be bad, 
or the mic output level insufficient.

Good luck, OM.

Wayne, AD5ST
Fort Worth, Tex.


>I have subject transmitter. Never worked on one before. The manual 
>says the meter should go 1/2 to 2/3 deflection on the basic tune-up. 
>My meter will only go up a little better than 1/3. I have checked 
>the resistors etc in the meter cct and all seems well. Anyone have 
>any ideas about this. Thanks in advance for any help in this regard.
>Murray
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