[time-nuts] HP and other equipment failure...

[Burt I. Weiner]

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.
biwa at att.net
www.biwa.cc
K6OQK