[time-nuts] Hydrogen Maser KIT! Update #1

Bob Camp kb8tq at n1k.org
Sun Nov 2 21:56:38 EST 2014


> 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.


> 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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