Bob kb8tq writes:
> Turning an “idea” into a production capable part involves making many
> batches of test samples. Think in the thousands of batches and hundreds
> of parts in each batch. You have a “search” process at the blank chopping
> level. You also have a search at the
Magnus Danielson writes:
> Exactly which double-angle cut's they did before SC remains to be found.
If somebody knows a crystallographer and is willing to sacrifice a unit,
that is something which could be found out...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
HI
> On Feb 18, 2021, at 8:06 PM, Lux, Jim wrote:
>
> On 2/18/21 4:38 PM, Bob kb8tq wrote:
>> Hi
>>
>> Ok
>>
>>> On Feb 18, 2021, at 6:40 PM, Magnus Danielson wrote:
>>>
>>> Hi,
>>>
>>> A lot of fascinating steps. It would be real fun if one would do a
>>> coarse in which one would
I built a 405 nm laser head for my mini-mill. It could cut features with a
resolution of around 4 microns. I mainly used it to cut solder paste stencils.
A friend used it to expose photolithography masks on quartz plates and
silicon wafers. Also to tune some vibrating reed like thingies by
Hi
> On Feb 18, 2021, at 9:17 AM, Lux, Jim wrote:
>
> On 2/18/21 3:53 AM, Poul-Henning Kamp wrote:
>>
>> Bob kb8tq writes:
>>
>>> Turning an “idea” into a production capable part involves making many
>>> batches of test samples. Think in the thousands of batches and hundreds
>>> of
Hi
Ok
> On Feb 18, 2021, at 6:40 PM, Magnus Danielson wrote:
>
> Hi,
>
> A lot of fascinating steps. It would be real fun if one would do a
> coarse in which one would actually build a handful of crystals oneself,
> to learn the basics, and measure them up. It would be a fun
> summer-coarse
The conversation may have strayed a bit.
Do need to address one comment that the crystal is a junk box unit. Its
sealed and is a FE crystal. Granted as is, it just may be junk. But it
originally most likely wasn't.
Well a good/bad test last night.
Manually controlled the oven temp and strange
Hi
> On Feb 18, 2021, at 6:53 AM, Poul-Henning Kamp wrote:
>
>
> Bob kb8tq writes:
>
>> Turning an “idea” into a production capable part involves making many
>> batches of test samples. Think in the thousands of batches and hundreds
>> of parts in each batch. You have a “search”
On 2/18/21 3:53 AM, Poul-Henning Kamp wrote:
Bob kb8tq writes:
Turning an “idea” into a production capable part involves making many
batches of test samples. Think in the thousands of batches and hundreds
of parts in each batch. You have a “search” process at the blank chopping
level.
Hi,
On 2021-02-18 12:53, Poul-Henning Kamp wrote:
>
> Bob kb8tq writes:
>
>> Turning an “idea” into a production capable part involves making many
>> batches of test samples. Think in the thousands of batches and hundreds
>> of parts in each batch. You have a “search” process at the
Hi
> On Feb 18, 2021, at 9:39 AM, paul swed wrote:
>
> The conversation may have strayed a bit.
>
> Do need to address one comment that the crystal is a junk box unit. Its
> sealed and is a FE crystal. Granted as is, it just may be junk. But it
> originally most likely wasn't.
> Well a
Bob kb8tq writes:
> > What properties would you program a quartz-crystal-prototyping robot
> > to search for ?
>
> You very much want to (eventually) know about perturbations over
> temperature for a given resonator design at a specific frequency. That
> tends to be the 'gotcha' on a
Bob
Oh this unit is a alpha or maybe not even that. So it would have been NRL
direction to FE from what very little I can find. I honestly looked at the
curves and did not see AT as a U shape. Hm. Thats a concern. Will look
far far more carefully. The charts I looked at had many xtal types SC
> On Feb 18, 2021, at 9:57 AM, Poul-Henning Kamp wrote:
>
>
> Bob kb8tq writes:
>
>>> What properties would you program a quartz-crystal-prototyping robot
>>> to search for ?
>>
>> You very much want to (eventually) know about perturbations over
>> temperature for a given resonator
Bob kb8tq writes:
> Even if you went with a different material, moving any of the specs listed
> above by 10X would be pretty amazing.
That was the answer I expected :-)
What about geometry ?
Would things like whispering gallery improve things if we found a reasonable
way to produce
Hi
One thing with quartz is that the acoustic Q gets better as
the frequency gets lower. If a 5 MHz 5th overtone has a Q of
3M (say), A 1 MHz 5th *could* have a Q of 15M. That assumes
you fully scale the package to keep the blank at the same
relative size. It also assumes some other effect
On 2/18/21 4:38 PM, Bob kb8tq wrote:
Hi
Ok
On Feb 18, 2021, at 6:40 PM, Magnus Danielson wrote:
Hi,
A lot of fascinating steps. It would be real fun if one would do a
coarse in which one would actually build a handful of crystals oneself,
to learn the basics, and measure them up. It would
On 2/18/21 7:40 AM, Poul-Henning Kamp wrote:
Bob kb8tq writes:
Even if you went with a different material, moving any of the specs listed
above by 10X would be pretty amazing.
That was the answer I expected :-)
What about geometry ?
Would things like whispering gallery improve
Hi,
A lot of fascinating steps. It would be real fun if one would do a
coarse in which one would actually build a handful of crystals oneself,
to learn the basics, and measure them up. It would be a fun
summer-coarse to do.
I have no expectance that it would be spectacular performance, just
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