[time-nuts] HP-106 and Sulzer Quartz Crystals

Bob Camp lists at rtty.us
Wed Sep 19 18:07:34 UTC 2012


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-bounces at febo.com [mailto:time-nuts-bounces at 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: n6idlron at comcast.net
> To: time-nuts at 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-bounces at febo.com [mailto:time-nuts-bounces at 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: lists at rtty.us
> > To: time-nuts at 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-bounces at febo.com [mailto:time-nuts-bounces at 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: n6idlron at comcast.net
> > > To: time-nuts at 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
> > > 
> > >  
> > > 
> > > _______________________________________________
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