[time-nuts] HP 4815 Vector Impedance Analyzer repair

Tom Curlee tcurlee at sbcglobal.net
Tue Jun 20 16:38:01 EDT 2017

The first thing I would do is replace all the power supply electrolytic capacitors on the internal boards.  If I remember correctly, the boards are plugged in and the replacing the capacitors is quite easy.  In my unit, at least one capacitor was shorted and was pulling down a power supply.  


      From: Richard (Rick) Karlquist <richard at karlquist.com>
 To: Discussion of precise time and frequency measurement <time-nuts at febo.com> 
 Sent: Tuesday, June 20, 2017 12:02 PM
 Subject: [time-nuts] HP 4815 Vector Impedance Analyzer repair
I have a non-functional HP 4815, don't know if it
is the probe or the box.  A long time ago, there
was a fellow named George Standford (something like
that) who repaired these.  My old contact information
for him is no good.  Does anyone know if he is still
in business, or if there is any other place that
repairs these things?

Rick N6RK
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