[time-nuts] B.V.A. 8600 for sale

[Didier Juges]

In the first post, you state "*While I can offer some proof of operation
for qualified TimeNutters,
Allen Variance Noise and sigma-tau phase noise are difficult parameters to
test without an acceptable reference,
so I offer a 14 day acceptance trial to vetted buyers*."
Which could be interpreted to imply that you have not actually tested these
samples for ADEV and phase noise to the levels in the device specification.

Yet, in a later email you state: "* the object must meet the standard ADEV
limit in OSA specification
or it should not be out there*" which seems to imply that you know the
devices you sell meet their original specification.

Please be clear:
Do you have the capability to test these units to verify their stated
specification and if so, have you done so and what equipment do you use?
(we need to vet you as a vendor)
If you do not have such capability, under what basis are you asserting they
meet their specification?

It may be that while you have the equipment to test these devices and you
have verified they meet their spec, you understand a prospective buyer may
not have that capability and therefore you allow him two weeks to satisfy
himself that the devices are as advertised.

I am not in the market for one of these although I admire the technology
that goes into making one of those, but I am just curious to know exactly
what you are offering for sale and how you have checked these devices.

Didier KO4BB


On Thu, Aug 29, 2013 at 8:30 AM, Mann Weltzeit <mweltzeit at ymail.com> wrote:

> yes you are missing something
>
> -> its the BVA holder that creates the Allen Deviation magic
>
> but I admit, it starts with a Quartz, yes
> (most of the CBTube based masers still steer a 8663...Quartz)
>
> these 8600-06 from 2003,
> just about the same time as the datasheet you referenced were about 14K
> CHf
>
> I recover ~ 4 per year from 5548B and from F3 and so on
> and of these , some are trash and saved for parts
>
> I have the experience to know which are 100%
> and I offer satisfaction with my price; the object must meet the standard
> ADEV limit in OSA specification
> or it should not be out there  (and I need them for parts)
>
> in confidence
> Manny
>
>
>
> ________________________________
>  From: Dr. David Kirkby <drkirkby at gmail.com>
> To: Mann Weltzeit <mweltzeit at ymail.com>; Discussion of precise time and
> frequency measurement <time-nuts at febo.com>
> Sent: Thursday, August 29, 2013 9:01 AM
> Subject: Re: [time-nuts] B.V.A. 8600 for sale
>
>
> On 29 August 2013 01:00, Mann Weltzeit <mweltzeit at ymail.com> wrote:
> > I have recovered BVA Oscillators from Telecommunications decommissioned
> equipment
> >
> > and these tested Oscillator Modules are offered for sale to the
> Time-Nuts group.
> >
> > I have two 8600-06 units with 5 MHz sinus wave output on two SMA
> > powered with 24 Volt DC (+/- 10%) operation at aproximate 200 mA
> quiescent.
> >
> > I offer satisfaction protection in private sale at $3000.00 USD for each
> unit
> > paid by Paypal only, including North American shipping, excluding
> insurance.
>
> Am I missing something, or is $3000 more than a little excessive for
> what a quick Google would suggest is an OCXO?
>
> http://www.tamadevice.co.jp/pdf/oscilloqartz/8600.pdf
>
> OK, they are good OCXOs, but still an OCXO.
>
> Maybe I am missing something.
>
> Dave
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