You will find on the schematic that the ALC voltage is generated by two
diodes on or near the final board. Sometimes these fail because of a
lightning discharge in the next county. Another nearby pair generates the
SWR voltage. When a fellow is in there replacing diodes, it is well worth
replacing all 4 or 5.
73, Mike N4NT
----- Original Message -----
From: "Sonny Eisenberg" <w4kxq@yahoo.com>
To: "TenTec List" <tentec@contesting.com>
Sent: Thursday, November 01, 2007 7:14 PM
Subject: [TenTec] Sick 580 Delta
While checking my Delta 580 & 260 P.S. setup before putting it for sale,
seems the ALC control is not working..Turns smooth but has no
effect...Everything else operates normal .Transmits fine but of course
have to watch the drive control or the power supply will shut down..Any
one know what I should check or does this need a call to Tentec..
Tnx for any help,
Sonny W4KXQ
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