[VHFcontesting] Disabling RF Sense on Mirage B1016G

[mikflathead at aol.com]

 I have a Mirage 220 amplifier that has a 6 terminal connector on the back side. I have been trying to find a way to hard key it. I have had no luck finding info on that connector. Can someone help? Thanks Mike

 

 

-----Original Message-----
From: Michael Clarson <wv2zow at gmail.com>
To: Mark Adams <msadams60 at gmail.com>
Cc: VHF Contesting List <vhfcontesting at contesting.com>
Sent: Tue, Sep 8, 2015 3:00 pm
Subject: Re: [VHFcontesting] Disabling RF Sense on Mirage B1016G


Mark: On the Mirage amps I've seen, there are two relays. There is one
(Ry1)
controlled by RF Sense, and an antenna relay (Ry2), which is
controlled by Ry1.
While putting the amp in the FM position should do what
you want (It only
changes how the amp keys. It always operates as a
linear). If you really want to
disable the RF Sense keying, there is a
transistor (MPSA13), colllector to relay
Ry1, emitter to ground. If you
remove that transistor, only external keying will
work --73, Mike, WV2ZOW

On Mon, Sep 7, 2015 at 8:41 PM, Mark Adams
<msadams60 at gmail.com> wrote:

> Hi Gang,
>
>
> This seems like it should be
REALLY EASY, but I cannot see what to
> unsolder or cut to get this amp to hard
key only. Extensive web searching
> yielding nothing useful. Ideas?
>
>
> Thanks
and see you this Weekend!!
> Mark K2QO running NF2RS/R for the contest.
>
>
—Mark K2QO
> Sent from Mailbox
>
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