[Icom] Relay

Tue, 13 Apr 2004 18:52:26 -0600

Dave,

No, no, no, no relay needed.  The Alpha 78 has 23VDC on the keying line 
and draws 3mA.  Look at the Alpha web site which says exactly the same 
thing. 

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

A non-inductive 23V open circuit and 3 mA short circuit load will not 
hurt any reed relay.

73,
Larry, W0QE

AL7HG wrote:

>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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