Actually, there is a 37 before the last digits, so they are 3720, 3760 and 3780 kHz.
On Sat, Nov 26, 2016 at 7:15 AM, Bob Camp <[email protected]> wrote: > Hi > > Welcome to eBay ….. > > I don’t believe those are crystals at all. If you take a look at the > markings on the parts > they are labeled “80 K cps”. In other words they are 80 KHz not 80M > devices. Looking > at the gap, if there is a crystal in there it’s not obvious that it’s big > enough for 80 KHz. > > My guess is that they are tank tuning caps for an mechanical MOPA style > transmitter. > The size and construction are about right for that sort of thing. Swap one > in and the > transmit frequency changes. Number 7 for 80 KHz. Number 8 for 85 KHz. > Number 7 for > 75 KHz. Just a guess … > > Bob > > > > > On Nov 26, 2016, at 7:40 AM, Adrian Godwin <[email protected]> wrote: > > > > I bought some old crystals on ebay : > > > > http://www.ebay.co.uk/itm/122225114483 > > > > Is anyone familiar with this style ? I don't think the quartz is visible > in > > the glass section : I imagine that's just an insulator. I think the > quartz > > is under a brass disc, with a sping to hold the disc down visible through > > the glass. > > > > Does anyone know what the reference marked on them "w'less sets No 7" > > refers to ? > > > > > > On Mon, Sep 26, 2016 at 6:50 AM, Mark Sims <[email protected]> wrote: > > > >> Can you say "Mr Rogers' Neighborhood?" I knew you could... > >> > >> He (along with creepy Mr McFeelie) always ran segments on how some item > >> was made. Geared towards pre-schoolers, but always worth watching. > >> > >> --------------------- > >> > >> Compare the Science channel's new "How Do They Do It" to the older "How > >> It's Made" > >> shows. > >> _______________________________________________ > >> 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. > > _______________________________________________ > 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.
