[Heathkit] Re: [Boatanchors] RE: GB> DX-60 T/R Relay?

[Revcom]

Yep Yep,
Years ago, about 50 as a matter of fact, I converted my DX-35 for PTT
operation with an external relay box. Did it through the octal socket in
back
if I remember right.   Used it for transmit and antenna changeover relay
control
as well as keying an external plate modulator.

Worked great.  Never had to change out switch on DX-35 ever.

Rod
K0EQH

----- Original Message -----
From: "Glen Zook" <gzook at yahoo.com>
To: "Dave Maples" <dsmaples at comcast.net>; "Bob Macklin"
<macklinbob at msn.com>; "Heathkit" <heathkit at mailman.qth.net>;
<glowbugs at piobaire.mines.uidaho.edu>; "Boatanchors list"
<boatanchors at mailman.qth.net>
Sent: Monday, May 12, 2008 6:45 PM
Subject: [Heathkit] Re: [Boatanchors] RE: GB> DX-60 T/R Relay?


> The problem with the mode switches in the DX-35,
> DX-40, and DX-60 series is generally not with the fact
> that the antenna relay is switched but due to the fact
> that the B+ is switched.  Those contacts wear out over
> time, MUCH faster than the contacts used to activate
> the antenna change over relay.  One "fix" is to use
> those switch contacts to activate a relay which, in
> turn, activates the B+.
>
> Glen, K9STH
>
>
> --- Dave Maples <dsmaples at comcast.net> wrote:
>
> I wonder if the real issue is switching the mode
> switch in general, vs. current through the 120 VAC
> relay?  Seems like the relay current would be trivial,
> but the switching transients in the other sections of
> the switch would be a real problem.  Comments?
>
>
>
>
>
>
>
>
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>
>
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