[Icom] AH-4 malfunctioning Part 2

[Cletus W Whitaker]

de WB2CPN South Central Pennsylvania   2002.06.29

The relays in mine don't run hot.  Rdo Shack has some you might
could use if you need them.  Do you suppose the voltage regulator
has shorted and the buss voltage is way high.  One thing, testing
into a 52 Ohm Dummy Load is not a very conclusive test.  I've found
that one single relay can be faulty, and cause the AH-4 to not tune
on whatever frequency and antenna characteristics you may have, if
the faulty relay is called into action.  I've had to have ICOM replace
a voltage regulator when it went open.  The transceiver didn't detect
its presence because it didn't draw much if any current.  I've had
to replace relays on my AH-2's, but on the AH-4's.  Let us know what
you learn.          73   Clete