[ICOM] Amp Keying Question Again

[Adam Farson]

Hi Dave,

Actually, when keying an amplifier from ACC(2) Pin 3 of an Icom exciter,
there is no need to disable the reed relay. For example, the Icom IC-PW1 is
keyed from ACC(2), and the exciter's reed relay has no function.

Cheers for now, 73,
Adam VA7OJ/AB4OJ

-----Original Message-----
From: icom-bounces at mailman.qth.net
[mailto:icom-bounces at mailman.qth.net]On Behalf Of David J. Ring, Jr.
Sent: Tuesday, June 21, 2005 15:33
To: ICOM Reflector
Subject: Re: [ICOM] Amp Keying Question Again


There are some ideas for QSK and speeding up transceiver switching (namely
eliminating the relays) for some transceivers.

http://www.somis.org/QSK922.html

I am not the author of the page, but the author is held in high regard by
many.

73

David N1EA

----- Original Message -----
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Monday, June 20, 2005 1:56 PM
Subject: RE: [ICOM] Amp Keying Question Again


Hi Joe,

The amplifier keying relay in an Icom transceiver cannot be disabled, but
you may be able to connect ACC(2) Pin 3 (SEND) to the AmpKeyer input. The
SEND line is bi-directional; it goes low on transmit, and grounding it
externally keys the transceiver. The relay will still operate, but keying
from the SEND line eliminates the relay's 1 mS latency.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


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