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.
Regards Bernd Neubig DK1AG www.axtal.com -----Ursprüngliche Nachricht----- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@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. Regards. Max. K 4 O DS. Email: m...@maxsmusicplace.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.