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Re: Tube coils for beginers 2



Tesla List wrote:
> 
> Subscriber: dwt-at-efn-dot-org Thu Jan 23 23:06:36 1997
> Date: Thu, 23 Jan 1997 22:07:06 -0800
> From: David Trimmell <dwt-at-efn-dot-org>
> To: tesla-at-pupman-dot-com
> Subject: Tube coils for beginers 2
> 
> Hello again,
> 
> I have recieved e-mail from my uncle who is a manager/radio engineer
> type and he replyed..
> 
> "These are pretty old tubes, and I don't know if any stations are still
> using them. Probably, but I don't know which ones.  Could you use
> pentodes like a 4cx250B or similar.  These are more easily available,
> but require air cooling."
> 
> So what about it? The 4cx250B's I should be able to get used ones for
> next to nothing. Again I am a beginer in this tube buisness, so be
> patient if I am asking stupid questions.
> 
> Thanks again,
> 
> David Trimmell <dwt-at-efn-dot-org>
> 
> PS-- I have also an interest in X-Ray generation and if anyone knows of
> any particular types of tubes that may be able to be pushed to produce
> them please let me know  (Please contact me via private e-mail, as to
> not burden Chip with off topic stuff) Yes I know the safety stuff as I
> have worked as a Radiation Safety tech.


Dave -

  The 4CX250 is a good tube. A bit more rugged than the standard
glass envelope 4-250. How little is 'next to nothing'??? (I might
be interested in a few myself.)

- Brent