Hi The CR-24/U is a *very* unusual crystal package. They had a tough time getting that one to work.
Bob > On Nov 26, 2016, at 4:58 PM, Brooke Clarke <[email protected]> wrote: > > Hi Adrisn: > > The BC-611 Walkie-Talkie is a crystal controlled 2-way radio where there are > a set of 4 components that need to be changed whenever a different frequency > is needed. This needs to be done in a workshop and not it the field. > http://www.prc68.com/I/BC611.shtml > Those 4 components are the Rx crystal, Tx crystal, Tank coil and antenna coil. > All of these were marked with the radio frequency rather than typical > parameters for a component. > So just because a component is marked with a frequency you can not be sure > it's a crystal, coil or whatever. > > The URC-4 survival/rescue radio uses cylindrical crystals CR-24/U package): > http://www.prc68.com/I/URC4.html#Components > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > The lesser of evils is still evil. > > -------- Original Message -------- >> The markings are actually 3720 k/cs, 3760 k/cs and 3780 k/cs. And I think >> it's probably for the wireless No 7 shown in http://www.wftw.nl/wsets.html. >> But you could be right - they may not be crystals. >> >> As for ebay .. yes, buyer beware. Though in this case I know the seller >> personally and while he might be mistaken, he won't be intentionally >> misleading. >> >> >> On Sat, Nov 26, 2016 at 3:15 PM, 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. >> > > _______________________________________________ > 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.
