[time-nuts] Hydrogen Maser KIT! Update #1
Bob Camp
kb8tq at n1k.org
Sun Nov 2 21:56:38 EST 2014
Hi
> On Nov 2, 2014, at 9:49 PM, Chuck Harris <cfharris at erols.com> wrote:
>
> In retrospect, it looks like their teflon coating is even simpler
> done. It looks like what they did is take very finely sectioned
> teflon powder, and make a slurry in probably acetone.
>
> They cleaned the vessel very well first with acetone and second,
> probably a little distilled water to etch the glass slightly,
> and then put the teflon/acetone slurry in the bulb, slooshed it
> around a bit to cover the walls, and then drained it all out.
> When the acetone evaporated, the teflon powder would remain on
> the walls.
If it’s that simple, then going crazy over the coating as I was suggesting isn’t really needed.
Bob
>
> I've seen a nearly identical coating every time I take a can of
> teflon spray lubricant/mold release, and spray it on something.
>
> -Chuck Harris
>
>>
>> I would think that making the teflon coating would be pretty easy.
>>
>> What I would try is to put a nichrome boat, and some teflon into the
>> vessel, and pull it down to a good vacuum. Then heat up the boat,
>> and the teflon should sublime, and condense on the walls of the
>> vessel.
>>
>> The nichrome boat could be something as simple as wrapping the nichrome
>> into a solenoid form around some teflon rod.
>>
>> -Chuck Harris
>
>
>
> Bob Camp wrote:
>> Hi
>>
>> It’s been way too many years since my last Maser play session …
>>
>> Will it fire up *without* the Teflon coating on the bulb? Yes it works *better*
>> with the Teflon (less wall interaction). Getting the bulb re-coated might be a
>> major pain. It does look ugly in it’s current state. I’m wondering about just
>> stripping the bulb and then seeing what works and what does not.
>>
>> Bob
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