[Icom] Relay

Tue, 13 Apr 2004 18:39:20 -0700

Hi Dave,

Please refer to this link:

http://www.qsl.net/icom/auxrelay.html

The keying relay in the 756Pro is rated at 16V, 0.5A. Alpha's
keying-parameter list shows the keying rating of the 78 as 23V, 3 mA.
Although the 23V keying voltage nominally exceeds the 16V rating of the
relay in the radio, the low keying current and non-inductive load should
ensure that no damage will occur.

http://www.alpha-amps.com/html/ampkey.htm

>From your description, your Ameritron ARB may be either defective or the
wrong type. I would suggest that you contact Ameritron.

Cheers for now, 73,
Adam VA7OJ/AB4OJ

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of AL7HG
Sent: Tuesday, April 13, 2004 17:42
To: [email protected]
Subject: [Icom] Relay

I have an Icom 756 Pro, which is driving an Alpha 78
amplifier. Several people have told me on the air that
I need a relay box to keep the amp from feeding
current back into the 756 and frying its relays.

Anyone know if this is true? Also if so, what relay
box works for this?

I have an Ameritron relay box, but it has a din plug
to go into the accessory plug, but when I try this it
does not work.

When I called AES they said that a relay box was not
necessary -- but I have talked to several hams who
have had to send their 756 back for repair due to this
problem.

Help!
Dave Kaiser, AL7HG
[email protected]

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