cfharris at erols.com
Sat Oct 10 16:01:32 UTC 2009
One thing to note, the 5370A has a slim line relay (K1) in the power supply
that switches all of the voltages on... it is there for the crystal oscillator.
I had one that didn't produce enough contract pressure to reliably switch on all
of the voltages, and would quit if you bumped it lightly. I had to readjust
the contact spring pressures, and it became reliable.
Greg Burnett wrote:
> The HP 5370A rear mounted heat-sink typically heats up to around 61 degrees
> C. This is very hot to the touch, so I suspect your unit's temperature is
> normal (unless it's running way hotter than 61 degrees C).
> The buzzing transformer might just be due to loose, vibrating laminations.
> You might try tightening the transformer's bolts to see if that reduces the
> P.S. I agree that the rear mounted heat sinks of most other HP equipment run
> significantly cooler. The models that run so hot to the touch are the
> 5370A/B, 5359A, and many of the legacy HP pulse generators (from Boblingen
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