Re: materials of electroddes for Neon gas tubes..

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

Tesla list wrote:
>
> Original poster: Terry Fritz <vardin@xxxxxxxxxxxxxxxxxxxxxxx>
>
> Hi Ed,
>
> Hey!  It's been 30 years since ;-))
>
> But yes...  It did get hot, but I fixed it somehow...  I think the
> motor "start" windings were still being engaged....  Be sure to hook
> it up just like it was originally in the fridge...  It only needs the
> higher resistance "run" windings once it is started.  I had a bunch
> of switches and stiff to do it manually.  It would all go up in smoke
> now and then :D
>
> There were three terminals... Common, start, and run...  Ohm them
> out...  The start winding was very low resistance.  It needed a motor
> start cap in there somehow too to get it going...
>
> They do use the refrigeration fluid to carry heat out of the
> pump...  But it should not be "too" bad when doing a vacuum...
>
> I would just use mineral oil or real vacuum pump oil in it.  Car
> stores also sell air conditioner oil.  Don't use automatic
> transmission fluid like I did unless you want to learn to love that
> smell ;-))  Mike a little oil catcher filter out of foam rubber if it
> smokes oil vapor out the back...
>
> Cheers,
>
>          Terry


Terry:

	Thanks and I'll check the connections but think they're the same as in
the AC since I used the original switch and wire.  How much oil and how
does one tell how much is too much? I wondered if it were getting hot
because of low oil but didn't see how that could be. I already have a
vapor trap (rag wrapped around exhaust tube).

Ed