That explains why so many DX-100's have that mod. I knew it was a popular mod
but I never realized it was specifically sold as a mod kit from Heath. Now I
know.
Randy.ab9go@gmail.com
-----Original Message-----
From: Amps <amps-bounces@contesting.com> On Behalf Of David Gow
Sent: Monday, January 3, 2022 12:44 PM
To: Rob Atkinson <ranchorobbo@gmail.com>
Cc: amps@contesting.com
Subject: Re: [Amps] DX-100B CW Keying
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or open attachments unless you recognize the sender and know the content is
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Bothethe DX-100 and the DX-100B came from Heathkit with cathode keying.
Heathkit did release a kit to change to grid block keying and it was available
(same kit) for both transmitters. In the instructions Heathkit states "...this
strictly optional..." It involves drilling a hole in the front panel to
install a push button switch and installing a terminal strip on the chassis.
if there is no push button on the upper right side of the panel then the grid
block optional modification is not installed. A copy of the Heathkit
instructions for the modification is on Glenn Zook's
(K9STH) web site.The Antique Radios forum is a wonderful resource. This
modification has not been discussed there yet.
Dave W7VM
On Mon, Jan 3, 2022 at 5:32 AM Rob Atkinson <ranchorobbo@gmail.com> wrote:
> I'd post your question here:
> https://urldefense.com/v3/__https://antiqueradios.com/forums/viewforum
> .php?f=5__;!!Ga0q2A!hY-R8ZAllY56HTe4KzPlsop9nLCk-DikEzkMMCnK7SBV7-K5GX
> 4Zy1AcqqLEI-M6LpLizDuQ29_nEDVS$
>
> The reason is that you need to communicate with vintage radio people.
> I've never owned a DX100 but my experience with classic transmitters
> is that manufacturers made fairly significant changes over production
> runs and the fellows referencing the DX-100 instead of the DX-100B may
> be giving inaccurate information. For example, EFJ's Ranger began as
> a cathode keyed rig, but the next major revision added a keying bias
> circuit for grid keying. Next came a PTT modification. So, it's
> possible the 100B is grid keyed. You need to use google to find the
> differences between the 100, and 100B.
>
> Happy New Year
>
> Rob
> K5UJ
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