Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
To a earlier comment I believe the NASA racks used Sulzers. Reason my 2 X are NASA and still work just fine. :-) Regards Paul WB8TSL On Tue, Nov 4, 2014 at 9:33 PM, Bob Camp kb...@n1k.org wrote: Hi Yup I’ve seen that seller before. I’ve wondered a lot what they are up to. Everything they sell is roughly 10X above the going rate. Most of it has “buy it now” as an option. If you need the manual, offer the guy the $25 that it’s worth and see what happens. He may accept. Stranger things have happened. I’d only start the process on something I REALY needed. Life is to short to play silly games with some of these people. Usual disclaimer - never bought from the guy, don’t know anything about him, he may be a prince, he may have ties to the Society of Rome …I have no idea. Bob On Nov 4, 2014, at 9:27 PM, EB4APL eb4...@cembreros.jazztel.es wrote: Hi Adrian, I found one at ebay, item #251687322849 but the crazy seller wants $249 for it. All his manuals and books are tagged with so exorbitant prices which is a shame because its commercial value is nil. Regards, Ignacio On 04/11/2014 a las 16:34, Adrian wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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. ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Paul, You are right, NASA's Deep Space Network (DSN) used a pair of Sulzers in their Frequency and Timing subsystem. At some time before 1972 they were replaced by a HP 5061A, a HP 5065A, and a HP Xtal oscillator, probably a HP 105B, the Sulzers remained in the rack several years but unpowered. A curious thing that I remember is that the Cesium was used for the clock and all the timing, but the Rubidium was used for frequency reference for a lot of equipment, mainly for multiplying up to microwaves for the transmitters and receivers. When I asked why, I was told that they were more phase clean for this application. Later an Hydrogen Maser replaced the Cesium as the primary reference and the crystal references were removed. The MSFN used in the Apollo program used a different Frequency and Timing Subsystem. Regards, Ignacio EB4APL On 05/11/2014 a las 15:27, paul swed wrote: To a earlier comment I believe the NASA racks used Sulzers. Reason my 2 X are NASA and still work just fine. :-) Regards Paul WB8TSL On Tue, Nov 4, 2014 at 9:33 PM, Bob Camp kb...@n1k.org wrote: Hi Yup I’ve seen that seller before. I’ve wondered a lot what they are up to. Everything they sell is roughly 10X above the going rate. Most of it has “buy it now” as an option. If you need the manual, offer the guy the $25 that it’s worth and see what happens. He may accept. Stranger things have happened. I’d only start the process on something I REALY needed. Life is to short to play silly games with some of these people. Usual disclaimer - never bought from the guy, don’t know anything about him, he may be a prince, he may have ties to the Society of Rome …I have no idea. Bob On Nov 4, 2014, at 9:27 PM, EB4APL eb4...@cembreros.jazztel.es wrote: Hi Adrian, I found one at ebay, item #251687322849 but the crazy seller wants $249 for it. All his manuals and books are tagged with so exorbitant prices which is a shame because its commercial value is nil. Regards, Ignacio On 04/11/2014 a las 16:34, Adrian wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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. ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Ignacio I think you will find that Time-nuts agree about the CS and RB usage. RB is cleaner for multiplying. At least thats my read from various time-nuts threads over the years. Regards Paul WB8TSL On Wed, Nov 5, 2014 at 12:53 PM, EB4APL eb4...@cembreros.jazztel.es wrote: Paul, You are right, NASA's Deep Space Network (DSN) used a pair of Sulzers in their Frequency and Timing subsystem. At some time before 1972 they were replaced by a HP 5061A, a HP 5065A, and a HP Xtal oscillator, probably a HP 105B, the Sulzers remained in the rack several years but unpowered. A curious thing that I remember is that the Cesium was used for the clock and all the timing, but the Rubidium was used for frequency reference for a lot of equipment, mainly for multiplying up to microwaves for the transmitters and receivers. When I asked why, I was told that they were more phase clean for this application. Later an Hydrogen Maser replaced the Cesium as the primary reference and the crystal references were removed. The MSFN used in the Apollo program used a different Frequency and Timing Subsystem. Regards, Ignacio EB4APL On 05/11/2014 a las 15:27, paul swed wrote: To a earlier comment I believe the NASA racks used Sulzers. Reason my 2 X are NASA and still work just fine. :-) Regards Paul WB8TSL On Tue, Nov 4, 2014 at 9:33 PM, Bob Camp kb...@n1k.org wrote: Hi Yup I’ve seen that seller before. I’ve wondered a lot what they are up to. Everything they sell is roughly 10X above the going rate. Most of it has “buy it now” as an option. If you need the manual, offer the guy the $25 that it’s worth and see what happens. He may accept. Stranger things have happened. I’d only start the process on something I REALY needed. Life is to short to play silly games with some of these people. Usual disclaimer - never bought from the guy, don’t know anything about him, he may be a prince, he may have ties to the Society of Rome …I have no idea. Bob On Nov 4, 2014, at 9:27 PM, EB4APL eb4...@cembreros.jazztel.es wrote: Hi Adrian, I found one at ebay, item #251687322849 but the crazy seller wants $249 for it. All his manuals and books are tagged with so exorbitant prices which is a shame because its commercial value is nil. Regards, Ignacio On 04/11/2014 a las 16:34, Adrian wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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. ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Hi Adrian, I have a Varian R20 here, along with its op/svc manual. Contact me off-list. /tvb - Original Message - From: Adrian rfn...@arcor.de To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Tuesday, November 04, 2014 7:34 AM Subject: [time-nuts] Varian R-20 Rubidium Frequency Standard I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Wow varian made RBs. Learned something today and sorry no manual. Regards Paul WB8TSL On Tue, Nov 4, 2014 at 10:34 AM, Adrian rfn...@arcor.de wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
In the Apollo era, NASA's Manned Space Flight Network tracking stations had a standard frequency rack called PFSS? which included a Varian R-20 among a couple of crystal oscillators (HP or Sulzer, I don't remember quite well) and perhaps an HP 5065A with a switching matrix, distribution amplifiers and ancillary equipment.. These were the only R-20s that I have ever seen. Regards, Ignacio On 04/11/2014 a las 16:58, paul swed wrote: Wow varian made RBs. Learned something today and sorry no manual. Regards Paul WB8TSL On Tue, Nov 4, 2014 at 10:34 AM, Adrian rfn...@arcor.de wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Hi Adrian, I found one at ebay, item #251687322849 but the crazy seller wants $249 for it. All his manuals and books are tagged with so exorbitant prices which is a shame because its commercial value is nil. Regards, Ignacio On 04/11/2014 a las 16:34, Adrian wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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.
Re: [time-nuts] Varian R-20 Rubidium Frequency Standard
Hi Yup I’ve seen that seller before. I’ve wondered a lot what they are up to. Everything they sell is roughly 10X above the going rate. Most of it has “buy it now” as an option. If you need the manual, offer the guy the $25 that it’s worth and see what happens. He may accept. Stranger things have happened. I’d only start the process on something I REALY needed. Life is to short to play silly games with some of these people. Usual disclaimer - never bought from the guy, don’t know anything about him, he may be a prince, he may have ties to the Society of Rome …I have no idea. Bob On Nov 4, 2014, at 9:27 PM, EB4APL eb4...@cembreros.jazztel.es wrote: Hi Adrian, I found one at ebay, item #251687322849 but the crazy seller wants $249 for it. All his manuals and books are tagged with so exorbitant prices which is a shame because its commercial value is nil. Regards, Ignacio On 04/11/2014 a las 16:34, Adrian wrote: I got a nice old Varian R-20 rubidium frequency standard that would be nice to get working. To begin with, there is at least a problem with the voltage regulator circuit. Does anyone have a manual? I couldn't locate anything on the web. Regards, Adrian ___ 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.
