My search on Google did not turn up much, some pictures of james knights but not the one you have and a note that at least one octal oven had the crystal on pins 4 and 6. http://www.leedsradio.com/images-odds/JamesKnights_JK013S25.JPG http://www.leedsradio.com/images-odds/JamesKnights_JK02.JPG Crystal maybe pins 4 and 6 (http://www.qsl.net/wa2whv/wa2whv-am.shtml) If you could find a device that used this oven and the schematic then you would have what you need.
----- Original Message ---- From: Neville Michie <[EMAIL PROTECTED]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Friday, March 7, 2008 2:47:00 AM Subject: Re: [time-nuts] James Knights ovenized crystal When I was working on military electronics in the 60s, crystals in ovens often had octal sockets. Inside the package there was a mechanical thermal switch on an aluminium casing around the crystal with a heater wrapped around it. Two pins will be the crystal, there may be more than one shield, two pins will run the heater, and you may have a pin from the switched side of the heating element to run the indicator lamp on the front panel. good luck with getting it going, Neville Michie On 07/03/2008, at 6:55 PM, Bill Bearden wrote: > I have a JK device named a "Thermystal". The > label says "1000 KC" 43 MMFD (any age clues > there?:-)). So I'm guessing it's an ovenized > parallel-resonant crystal which is (was?) on > frequency with 43 pf in parallel. This is a > fairly large unit, about 1.75 X1.25 X 3.25 inches. > It has an ordinary octal plug on the bottom. > > > > Does anyone have any information on this or a > similar unit? I've had no luck with Google. I > especially would like to have the pin connections > and oven voltage, and whether there is anything > other than a crystal and oven in the box. If > worst comes to worst, of course, I'll open it up > and look. > > > > Thanks, > > > > Bill, WB6JVC > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/ > time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
