Ever wanted to see inside a Sylvania Flourescent Christmas l

[Hemingray]

how about a small piece of glass or porcelain/ceramic?

those can take some pretty good heat (especially the porcelain and/or ceramic)

[Alan Franzman]

Hemingray,

I did think of that but I haven't thought of where I would find such a thing.

Hmm, it just occurred to me where I might have something, though it's likely to be very fragile if I do...

(Pause for 20 minutes of rummaging and examination)

Well, I have a tiny glass tube perhaps 1.5mm O.D. and 10mm long - probably too small - and a ceramic tube slightly longer and about 4mm O.D. - may work if not too fat.  I could possibly even slide it over the bulb stem... nope, too small.

BTW both of those came from a broken Nixie tube that I disassembled a while ago.  The ceramic tube is in the base of some nixies covering a heater coil that is used to vaporize mercury during manufacture, and the glass tube is used (also only in some nixie designs) to insulate the metal support posts from the number cathodes.  I tried a larger Nixie tube first but it didn't use either of those two tubes in its construction.

Oh well, still thinking...


------------------
 
Alan "A.J." Franzman

Email: a.j.franzman at verizon dot net

------------------

[James]

Alan,

Just a quick thought - if you need a custom made bit of glass just let me know what size you want.  I can hand-draw you a piece of glass rod to any diameter you might want from 0.1mm upwards and cut it to any length.  Can even be made C-shape curved if it would help you fit it in the lamp base.  Really, it's not even 5 mins work to do something like that so let me know if it might be of use.

James.

[Alan Franzman]

quote:Originally posted by James:
if you need a custom made bit of glass just let me know what size you want. I can hand-draw you a piece of glass rod to any diameter you might want from 0.1mm upwards and cut it to any length. Can even be made C-shape curved if it would help you fit it in the lamp base.

Thank you, James, that's very generous of you. I'd feel really bad if I asked you for something like that and then lost or broke it after you sent it all the way from the U.K.  Would you be so kind as to send me two or three? I'll be happy to compensate you for your efforts and postage.

The original glass fiber bundle is about 1mm diameter and 22mm long (including metal ferrules crimped onto the ends holding everything together.) The best place I can think of to put an inflexible replacement would be at the bottom edge of the largest-circumference part of the bakelite.  See Chris's first image.  I.D. of the bakelite here is about 20mm.

Allowing room for the wire and the braided covering, a glass rod of 1 - 2 mm diameter curved into a half-circle or slightly more around a 16 - 17mm O.D. form should be about right.


------------------
 
Alan "A.J." Franzman

Email: a.j.franzman at verizon dot net

------------------

[This message has been edited by Alan Franzman (edited October 21, 2002).]

[James]

OK Alan, unless I hear otherwise from you before the weekend I shall make up a couple of pieces in pyrex glass to the drawing below:



Please let me know ASAP if anything needs changing!

Best regards,

James

[This message has been edited by James (edited October 24, 2002).]

[Chris W. Millinship]

Hmmm, `twould appear UBB code has been shut off, since your image doesn`t show...

Let`s try this one:





------------------
visit my world of electrical things that glow!

[Alan Franzman]

It looks like that should work!

------------------
 
Alan "A.J." Franzman

Email: a.j.franzman at verizon dot net

------------------