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

Wed Sep 19 17:38:57 UTC 2012

The BVA's aren't quite that good (at least, the commercially available 
ones).  The best of the Oscilloquartz 8607B units (option 008) are 
spec'd for 8x10e-14 from 2 to 30 seconds, and from the reports I've seen 
typically measure around 7e-14 at their lowest point.  There are a 
couple of papers published about a new 8607C that gets down into the 
mid-14s, but still not down to 1e-14.  It doesn't appear to be 
commercially available yet, though.

The OSA 8607 has better phase noise at 1 Hz than the Wenzel ULN, but as 
Tom noted the Wenzel has a much lower floor.  It's an interesting 
example of optimizing for different things -- the ULN is superb at low 
PN and especially low floor, but its ADEV and aging aren't anything to 
write home about (and as some of us have found, the non-Blue-Top version 
is wickedly sensitive to electrical and physical environment).

On the other hand, the 8607 has wonderful ADEV and aging, but the noise 
floor isn't that great.  Different requirements, different designs.

John

Bob Camp said the following on 09/19/2012 12:15 PM:
> Hi
>
> Piezo and Colorado Crystal made a lot of blanks for HP back in the good old
> days. Piezo became Corning and ultimately Vectron. They no longer supply
> blanks.
> I've never seen an OCXO other than a BVA that will hit 1~2x10^-14 at one
> second. If Wenzel has something that's as good as or better than that level
> of performance without a BVA I'd be amazed.
>
> 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 11:38 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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