756PRO and AL84 keying - Amplifiers Forum at eHam.net

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eHam.net Forum : Amplifiers : 756PRO and AL84 keying

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756PRO and AL84 keying	Reply
by VE3TMT on November 2, 2009	Mail this to a friend!
The AL84 keying circuit is rated at 12V at 100mA. Will the 756PRO's keying circuit safely handle this? I have seen conflicting reports on the rigs capability. I have keyed the amp direct with a TS2000 without issue so I don't see the PRO posing a problem. Just want to confirm. Max VE3TMT

RE: 756PRO and AL84 keying	Reply
by WB2WIK on November 2, 2009	Mail this to a friend!
It'll handle it just fine. You might check to be sure the relay coil in the amp has a "kickback" diode installed across it, though. This ten-cent addition (if it hasn't one) can save a lot of problems.

RE: 756PRO and AL84 keying	Reply
by K8KAS on November 5, 2009	Mail this to a friend!
Spend $2.50 for a Radio Shack reed relay to use as a buffer circuit and never worry again. The Icom idea of a amp keying circuit is a joke. The $2.50 reed relay will save you a lot of money and work should the Icom fail. I went thru 2 keying problems with my original IC756. 73 Denny

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