[Heathkit] DX-100 mods

[sbjohnston at aol.com]

The similar Apache TX-1 has a spotting switch. It also has sequential 
keying of the stages using a neon lamp that might be useful for chirp 
control.   Compare the TX-1 schematic with that of the DX-100 for ideas.

http://www.wd8das.net/TX-1.gif
http://www.wd8das.net/dx100.gif


Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
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Radio is your best entertainment value.
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-----Original Message-----
From: Bob - K2KI <k2ki at starc.org>
To: heathkit at mailman.qth.net
Sent: Sat, Jul 25, 2009 1:03 pm
Subject: Re: [Heathkit] DX-100 mods










I myself would love to see the schematic for the spot switch. I looked
through what I have and I don't have it.

Can anyone pass it on?

73, cul...
Bob de k2ki


-
Denny Crane



Glen Zook wrote:
> I you are referring to the Heath modification sheet which also 
includes adding
the spotting switch:  The only thing is that if you do all of the 
keying
modifications the VFO runs continuously when the transmitter's plate 
switch is
activated.  If you monitor yourself in a receiver this can be annoying.
>
> Now adding the spotting switch is very handy.
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
> --- On Wed, 7/15/09, Bill Cromwell <wrcromwell at gmail.com> wrote:
>
> I have a PDF file here describing a mod for the DX-100 to use 
grid-block
keying and I am considering using it on my DX-100. Do any of you have 
experience
with this? Any 'gotchas'?
>
>
>
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