To: | "JOS Earthlink" <jsternmd@earthlink.net>,"Amps Amps" <amps@contesting.com> |
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Subject: | Re: [Amps] Alpha 87A Mic Click Grid Current Spike |
From: | "Paul Christensen" <w9ac@arrl.net> |
Date: | Thu, 8 Nov 2007 18:29:06 -0500 |
List-post: | <mailto:amps@contesting.com> |
> Just noticed that when I PTT on my mic that my Alpha 87A Grid current > always > shows a momentary spike of about 70ma. Start by taking the transceiver RF out of the equation. Remove only the coaxial cable between the 87A and transceiver.and key the amp's PTT line with the transceiver. Even better, bypass the transceiver altogether and key the amp's PTT line with a dry contact closure. If the grid current no longer spikes, then the transceiver may be producing a short burst of high power even with negligible drive. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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