[ICOM] AMP INTERFACE TO 756 PRO II (CONTINUED)

[paul at w8aef.com]

> The exciter probably applies RF a few mS after extending a ground on the
> SEND line. One could shorten this interval by using the ACC(2) Pin 3 SEND
> line to turn on a solid-state buffer, which would in turn ground the amp's
> PTT line.

I found that on my PROII the ACC(2) Pin 3 SEND lead releases before the 
PROII's rf ends.  The symptom was that while operating QSK my Alpha ran at 
reduced power output.  Actually it was the ALC in the PROII seeing a 
(momentary) open circuit and the antenna spigot and shutting itself down.

The cure was to go back to using the PROII's relay output to key my 
amplifier.

de Paul, W8AEF