[AMRadio] AM Amps

Gary Schafer garyschafer at comcast.net
Wed Jan 12 19:52:19 EST 2005


If you don't have any luck here try the Amps mailing list. Sure to find 
it there.    amps at contesting.com

Gary  K4FMX

John Coleman wrote:
> While on the Amplifier discussion, does any one know about a LK-800A by Amp
> Supply.  It has 3 forced air cooled 800 watt plate dissipation, ceramic
> tubes, I think.  It has some sort of a delay circuit to keep idiots from
> applying drive before the heaters or up to temp.  This circuit has failed
> and now it doesn't ever allow keying.  On the only schematic we have, there
> are no details about the timer delay circuit.  It has a 555 timer and some
> other relays on a small circuit board.  I'm hoping some one here has the
> needed info, else I have to reverse engineer the thing and will probably
> disable the stupid timer.
> John, WA5BXO 
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