My HP-3336A was purchased from an auction (not eBay) and came out of
a Southern California lab that was shutting down. The small heat
sink ran awfully hot. I added a larger heat sink and it eventually
became pretty hot also. What I discovered was the line voltage was
set to 100 volts, not 120 volts. I know for sure that this
instrument was used in the US. Changing it to 110-120 resolved the
problem and it now runs cool. I should've checked the line voltage
setting when it arrived, but I just assumed...
Burt, K6OQK
Subject: Re: [time-nuts] HP and other equipment failure
Talking of Cooling HP 5370's, I have a 12V fan Gorilla taped to mine
fed from a wallwart.
Not elegant, but it has reduced the heat sink temperature dramatically.
Is anyone else concerned about the heat sink temperature on the 5370?
Has anyone done a fan modification they would care to share?
Also, my 8566A RF section pass transistor heat sink gets awfully
warm too, does anyone have a sensible solution?
-marki
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
[email protected]
www.biwa.cc
K6OQK
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