[time-nuts] Counter collector

[Richard (Rick) Karlquist]

About 30 years ago, someone gave me an HP524 counter, which
is the one this plug in was for.  It had I don't know how
many dozens of tubes.  There was a huge filament transformer
for all these tubes.  I cannibalized the transformer and folded up a 
box out of sheet metal as a case for it and made it into
a 12VDC 20A power supply.  It has faithfully served me for
all these years now.

Rick N6RK 

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Bill Janssen
> Sent: Friday, July 14, 2006 8:15 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Counter collector
> 
> 
> Was it on this group that some one was telling about their counter 
> collection ?
> 
> I have a manual for HP 525B Frequency Converter Unit. This is a plug in
> for the big, tube type HP counter. The manual is free for any one that 
> wants it.
> 
> Bill K7NOM
> 
> 
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