The only ones that will work are very recent designs. The HP 117 and Fluke 207 will not work. Many Spectracoms will not work. A few will. See their web site The Stanford 620 will not, I believe. Some models may.
I posted a partial list some time ago. Apparently, NIST is working on a receiver and possibly a retrofit. When it will be available and how much it will cost is TBD. I suspect the 'retrofit' will be the receiver with a 60 kHz output added, nothing more, but don't know. Seems to me, we are down to one egg in one basket. :(( -John ================ > Dear Group, > > This thread just saved me from a prospective purchase of an HP 117. > > Now the big question. Which instruments in general will be affected by > the BPSK transition? I have been reading about Kinemetrics 60DC WWVB > receiver and clock. It appeals to me if I find one. Will other WWVB > instruments not designed specifically for phase comparisons be > affected for the WWVB signal modulation changes? Which kind of > instruments and interactions with WWVB should I avoid? > > Thank you. Your comments are surely welcome. > > Regards, > > > Edgardo Molina > Dirección IPTEL > > www.iptel.net.mx > > T : 55 55 55202444 > M : 04455 20501854 > > Piensa en Bits SA de CV > > > > Información anexa: > > > > > CONFIDENCIALIDAD DE INFORMACION > > Este mensaje tiene carácter confidencial. Si usted no es el > destinarario de este mensaje, le suplicamos se lo notifique al > remitente mediante un correo electrónico y que borre el presente > mensaje y sus anexos de su computadora sin retener una copia de los > mismos. Queda estrictamente prohibido copiar este mensaje o hacer > usode el para cualquier propósito o divulgar su en forma parcial o > total su contenido. Gracias. > > > NON-DISCLOSURE OF INFORMATION > > This email is strictly confidential and may also be privileged. If you > are not the intended recipient please immediately advise the sender by > replying to this e-mail and then deleting the message and its > attachments from your computer without keeping a copy. It is strictly > forbidden to copy it or use it for any purpose or disclose its > contents to any third party. Thank you. > > > > > > On Jul 5, 2012, at 11:32 AM, Merchison Burke wrote: > >> I thought about doing that but I did not want to spend a lot of time >> experimenting fruitlessly. >> >> Thanks for the encouragement. >> >> Merchison >> >> >> On 2012-07-05 11:19 AM, Burt I. Weiner wrote: >>> Many years ago I had one of these antennas that I used with a >>> Gertsch RLF-1 WWVB receiver. When the Nuvistors became old and >>> feeble I decided to change the 6CW4 Nuvistors to FETs. Being young >>> and foolish and thinking this is basically audio, I went to Radio >>> Shack and got some N-Channel FETs and stuffed the FET's leads into >>> the appropriate Nuvistor socket pins: Gate to Grid, Source to >>> Cathode, and Drain to Plate. As I recall, I had to add a wee bit >>> of capacitance to make it tune back down to 60 KC - back then I >>> didn't know from kHz. I made a voltage divider inside the >>> antenna's junction box to get the higher voltage down to what the >>> FETs wanted. It ran fine for the remaining 8 to10 years that I >>> used the RLF-1's. I forget where the antenna went, but it may >>> still be in use somewhere. At least I hope so. >>> >>> Burt, K6OQK >>> >>>> From: Merchison Burke <merchi...@yahoo.co.uk> >>>> To: time-nuts@febo.com >>>> Subject: [time-nuts] HP 117/10509a >>>> >>>> Hello, >>>> >>>> Has anyone successfully replaces the Nuvistors in the 117 and the >>>> 10509a >>>> with FETs. I would like to replace them with inexpensive FETs >>>> instead of >>>> buying the expensive Nunistors. >>>> >>>> Thanks for all help, >>>> Merchison >>> >>> Burt I. Weiner Associates >>> Broadcast Technical Services >>> Glendale, California U.S.A. >>> b...@att.net >>> www.biwa.cc >>> K6OQK >>> >>> _______________________________________________ >>> 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. >>> >>> >>> ----- >>> No virus found in this message. >>> Checked by AVG - www.avg.com >>> Version: 2012.0.1913 / Virus Database: 2437/5112 - Release Date: >>> 07/05/12 >>> >>> >> >> >> _______________________________________________ >> 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. > > _______________________________________________ > 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. > > _______________________________________________ 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.