Hi Bob; Actually a pair of each so you can cross-correlate against your DUT. I think for us Time-Nuts this is the system that differentiates it from a hobby and a disease.
Thomas Knox > From: li...@rtty.us > To: time-nuts@febo.com > Date: Wed, 19 Sep 2012 14:07:34 -0400 > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > Hi > > For enough money, you could indeed take care of the noise floor. One > approach would be to phase lock a "cheap" ULN to the BVA. > > Bob > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Tom Knox > Sent: Wednesday, September 19, 2012 2:03 PM > To: Time-Nuts > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > The BVA is the designers initials Boîtier à Vieillissement Amélioré. What > makes it unique is the there is no metal contacting the quartz to lower the > Q, It is capacitive/electrostatic coupled. This design allows fantastic > close in Phase Noise, but a high noise floor. They are a thing of beauty. > > Thomas Knox > > > > > From: n6idl...@comcast.net > > To: time-nuts@febo.com > > Date: Wed, 19 Sep 2012 10:30:16 -0700 > > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > > Hi: > > What does BVA stand for? > > What is a blue top? > > Are HP 10811 "Blue Stripe Replacement" Quarts Oscillators just junk? > > What was HP's Blue Stripe Replacement program about? > > Thanks, > > Ron > > > > -----Original Message----- > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > > Behalf Of Tom Knox > > Sent: Wednesday, September 19, 2012 8:38 AM > > To: Time-Nuts > > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > > > > Hi Bob; > > Quartz is of course and art so generally speaking the BVA is great very > > close in, but at 1Hz they do not have much if any better performance. And > > further out the Wenzel's noise floor is about 20dB below the BVA . Factor > in > > that the Blue Top cost(appr $6000) is about 1/4 of a BVA (appr$25000) and > it > > seems almost cheap. I response to an eariler question I think corning > makes > > most of HP's 10811 era and Wenzel Blanks. I wish I could find a couple > Blue > > Tops at a reasonable price. and while I am at it I wish I could also find > a > > Beach House in New Zealand for cheap. > > > > Thomas Knox > > > > > > > > > From: li...@rtty.us > > > To: time-nuts@febo.com > > > Date: Wed, 19 Sep 2012 10:56:44 -0400 > > > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > > > > Hi > > > > > > For a time standard crystal, the real question is "how much room do you > > > have?". If volume / power / cost is not a concern, there are a lot of > ways > > > you could go. The market has moved away from the big old beasts mainly > > > because people simply don't have the room for them any more. > > > > > > That said, a BVA running on a 5th overtone at about 1 MHz in a 4" or so > > > glass bottle likely would do pretty well. I suspect you could get a > batch > > > made for around $1M. > > > > > > Bob > > > > > > -----Original Message----- > > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > > > Behalf Of Tom Knox > > > Sent: Wednesday, September 19, 2012 10:47 AM > > > To: Time-Nuts > > > Subject: Re: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > > > > > > > Ron; > > > I think the Wenzel Blue Tops are very good. > > > > > > Thomas Knox > > > > > > > > > > > > > From: n6idl...@comcast.net > > > > To: time-nuts@febo.com > > > > Date: Tue, 18 Sep 2012 22:31:25 -0700 > > > > Subject: [time-nuts] HP-106 and Sulzer Quartz Crystals > > > > > > > > Hi: > > > > > > > > Does anyone know who made the crystal for the HP-106 and / or Sulzer > > > > oscillators? > > > > > > > > > > > > > > > > Is Bliley Electric Company still in business? They use to sell a 5th > > > > overtone precision quartz crystal for "frequency standard" use. > > > > > > > > > > > > > > > > Where could you find the ultimate crystal today for a frequency > > standard? > > > > > > > > > > > > > > > > Thanks, > > > > > > > > Ron > > > > > > > > > > > > > > > > _______________________________________________ > > > > 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. > > > > _______________________________________________ > 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.
