[time-nuts] Interesting looking crystal on ebay

Bernd Neubig bneubig at t-online.de
Fri Mar 8 01:07:48 EST 2013

It may be interesting to know, that the odd number of the pin spacing of the
HC-6/U (12.35 mm) comes from the octal tube socket.
With that pin spacing you can put two HC-6u/U crytals in one socket.
The same is hor HC-18/U. It' pin spacing (4.88 mm), which fits into a noval
tube socket accordingly.


Bernd Neubig 

-----Ursprüngliche Nachricht-----
Von: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] Im
Auftrag von Max Robinson
Gesendet: Freitag, 8. März 2013 04:19
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] Interesting looking crystal on ebay

I have in my collection of objects, my wife calls it junk, a 100 kHz crystal
in a package that looks like an octal base tube.  It was cast off from
somewhere and is in an oven but I can't find a circuit that will make it
oscillate at 100 kHz.  That is probably the reason it was cast off.  An HP
wave analyzer, model number forgotten, used several similar appearing
crystals in the narrow band filter of the 100 kHz IF.  Also the HP 3570A
network analyzer uses three of them  the 100 kHz IF in each channel.  It
wouldn't surprise me to learn that the same engineer designed the IF strip
for both instruments.


Max.  K 4 O DS.

Email: max at maxsmusicplace.com

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