No subject

that the same person who messed up the alignment of the i.f. and het coils=

may also have played with the balanced modulator.

If you have the manual, there should be a description of how to get your
carrier NULLED OUT for SSB transmission. If the null control is not zeroed=
,
then yes, you will get a big fat carrier out of the rig as soon as the
PTT line is keyed.

That is the first thing I would check. See if the voltages match the chart=
s for
the regions of the circuitry connected with the CRYSTAL FILTER and the
balanced modulator. I t could also be something wrong with the filter or i=
t's
associated components.

What an exciting project! To go from a dead receiver & transmitter to gett=
ing 100 watts
carrier out is a major step forward in the project. Congratulations!

Brian, AF4K

On 24 Feb 2001, at 21:40, Ken Ketner wrote:

> Greetings Dwellers on the Heath:
>         I am working on a HW 100. I have been having some luck with it. =
Not too
> much worked at first. I went thru the tubes and got a good set of em in
> it. That helped a bit. Receiver started to pass some signals weakly.
> Still no RF output, however. Then I discovered it needed 300 volts on
> the B+ line, so I rigged up a hi/lo switch for my early but very
> workable HP 23 PS. It now delivers 300 V and that helped some. A little
> teeny bit of RF output now and receiver got some stations fairly well if
> it was turned up full blast. So I did a complete receiver alignment.
> Turned out the het oscillator coils on every band, and the driver and
> plate coils ditto, were way off. After all that adjusting and fixing,
> the receiver seems right. So I turned to the TX. I do pretty well on
> receivers, but not so well with transmitters. Anyhow, now it puts out
> 100 watts plus. But, the bias is way high. And basically the set puts
> out full power if one presses the push-to-talk button. I am thinking
> this means that the PA tubes (6146s) are oscillating. I tried adjusting
> the neutralizing capacitor but that doesn=92t seem to change the conditi=
on
> of full-on PA tubes. About my only guess is that something is wrong with
> the neutralizing circuit.
>         Any of you greenish chaps got some idears to lead me out the dar=
k? I
> think the ole HW 100 ain=92t too far from fixed,  but I=92m stumped now.
> --
>
> Ken Ketner
> ARS KA5ELD
>                 Personal Webpage: http://www.wyttynys.net
>                 Office Webpage: http://www.pragmaticism.net
> Email:
>         home:   ketner at arisbeassociates.com
>         office: b9oky at ttacs.ttu.edu
>
> US MAIL
> PO Box 65135
> Lubbock, TX 79464
>
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