HP-1144A HELP!

[Sandy Gerli]

Hi, folks,

My P/S for my SB-104A has problems. Blew the 20A F2 during a QSO this
morning.

Have the -A series manual for the P/S, but no schematic. Problem is that
I have lost regulated 13.8V output. Voltage Adjust pot now ineffective.
Vout varies erratically from abt. 11.5 to 14.5 with pot on munimum.

Manual recommends that Q1, Q1, D1, R3 or U1 may be faulty. Some time ago
(receipt on hand), a former owner bought new Q1 and Q2 - 2N3771 from a
Heath store in 1988 and that fixed it - then.

Anyone have a hint or a familiar fix? I'd sure appreciate hearing from
you!

73,
--
Sandy Gerli, AC1Y
500 Country Club Road
Avon, CT  06001-2406
(860) 675-5566
E-Mail: angerli at esslink.com

Life Member: ARRL, QCWA
Collins Collectors Association
Hallicrafters Collectors Association

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