Thanks for the lead.  I'm not finding anything though.  Plumbing's not
really my thing.


On Mon, Oct 26, 2015 at 11:11 AM, William Wilson <cris@clemson.edu> wrote:

> I believe the part you are looking for is a "7/16" C Tube Cap".
> Or as it is more commonly called a 7/16 end cap in pneumatic, hydraulic,
> and plumbing operations.
> They are a stock parts and come in a variety of lengths and even tapers.
> Usually made from brass (air), bronze(water), steel(hydraulic), or even
> chrome plated.
> If there is someone in your area that does pneumatic work, they will
> probably have one in their truck; otherwise, try brassworks.com.
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of David VanHorn
> Sent: Sunday, October 25, 2015 9:14 PM
> To: Microcontroller discussion list - Public. <piclist@mit.edu>
> Subject: [EE] An odd fitting I need to find.
>
> I need some help sourcing the metal fitting in the picture:
> http://ecx.images-amazon.com/images/I/310e-2lm8RL._SY355_.jpg
>
> It's 7/16 OD, thin wall brass.  It matches K+S stock tubing except that
> the end is rounded off and closed.
> http://www.hobbylinc.com/htm/k+s/k+s8137.htm
>
> The diameter is critical, the fitting it goes in doesn't flex much.
>
> I am not too picky on length, more than half is good, more than an inch i=
s
> a problem.
>
> A hole in the closed end is actually good, but not critical.
>
> Someone somewhere makes these things, it's probably some common thingus
> used on something I've never heard of.   Can anyone here match it up with
> something?
>
> Jewlery fittings are close, but all I've seen are too small in diameter
> and only about 1/4" long.
>
>
>
> Why:
>
> I have an antique "Violet Ray" device that I would like to make some ends
> for.  It's a rare one, which runs from 32V "farm current".  Such devices
> were made by the truckload around the turn of the century, to cure whatev=
er
> ailed you, but the vast majority are 110 or 220V for europe.  The farm
> current device is unique.
>
> I could just go buy something like in the pic, but I want to make
> something more like a geissler tube, which is a bit of a project.  To tha=
t
> end, I've taken up glassblowing, found a source of uranium glass, built a
> vacuum manifold and "filling station" and learned to seal off these tubes
> when under vacuum of 1-10 torr.
>
> On Ebay, there is a set of Christmas lights that are for 32V farm current=
,
> starting bid is $750 for eight lamps in a string.
>
> http://www.ebay.com/itm/Vintage-Christmas-Lights-Delco-Farm-32-Volt-Noma-=
4-Volt-Mazdas-Extremely-Rare-/171975314757?hash=3Ditem280a870d45:g:~rcAAOSw=
5VFWHB7f
>
> Apparently the decision for 32V went along the lines that farmers
> generally suck at being electricians, so 32V isn't too bad on I^2R losses=
,
> but low enough for few fried farmers.  Standard 110V plugs and switches
> were used though, which could get exciting if you took your farm device a=
nd
> plugged it in on a trip to the big city.
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