[time-nuts] Rakon HSO-14
kb8tq at n1k.org
Sat Feb 3 19:03:25 EST 2018
Back when the BVA was up for sale, by far the biggest issue was the machining involved
in making those slots. They don’t just have to be slots. They have to be very precise. Etching
will not do the trick. Neither will most machining processes. Electrode shape changes have
been part of resonator production for a lot of years …..
> On Feb 3, 2018, at 5:50 PM, Magnus Danielson <magnus at rubidium.dyndns.org> wrote:
> The slots and thus the remaining bridges seems to have been a relatively
> simple stage of the process. Orientation of the blank seems to have been
> simple. The shapes for the electrodes seems to have been worse.
> On 02/03/2018 11:34 PM, Bob kb8tq wrote:
>> The “BVA” part of the name refers to the slots machined into the crystal blank
>> to manage the mounting stress on the resonator. Both the “plated on the blank”
>> and the “electrodes off blank” versions are legit BVA approaches. Indeed the
>> electrode off the blank version is the more expensive (and higher performing)
>> of the two.
>> In addition to price, one probably would want to get a quote of the delivery lead
>> time. There are some fancy OCXO’s out there with > 1 year delivery cycles.
>>> On Feb 3, 2018, at 5:02 PM, Attila Kinali <attila at kinali.ch> wrote:
>>> On Fri, 2 Feb 2018 11:02:27 -0800
>>> <cdelect at juno.com> wrote:
>>>> Anyone priced a Rakon HSO-14 option 8.
>>>> It's the Oscilloquartz 8607 option 8 replacement.
>>>> I'm almost afraid to ask!
>>> I do not know the HSO-14, but when I asked what the 8607 costs new, I
>>> got ~5000 CHF for the "lowest" grade and over 14k CHF for the highest
>>> grade. Of course this was a couple of years ago. I do not know how
>>> the prices changed in the meantime. Considering that Rakon does not
>>> build a true BVA, but instead puts the electrodes directly on the
>>> resonator, I would expect them to be quite a bit cheaper (because
>>> it doesn't require the couple of µm precision between the resonator
>>> and the holder/elctrodes the BVA has).
>>> Attila Kinali
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