Re: Tubes---- (fwd)

• To: tesla-at-pupman-dot-com
• Subject: Re: Tubes---- (fwd)
• From: Bob <misiura-at-nccoast-dot-net> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Mon, 19 Apr 1999 18:58:38 -0600
• Approved: twf-at-verinet-dot-com

Chris,
You don't say what power level you want . . . all the tubes you mention
are poor choices for a Tesla coil.  (you even have a rectifier and FM
discriminator in the mix).

Look for something with a physically large glass bottle, with a plate
cap.  (metal tip on top).  The tubes you mention are low power receiver
tubes, you want a transmitter tube.

The 50L6 comes closest to a TC suitable tube.  It requires a 50 volt
filament supply and is rated at ~3.8 watts in a Class A application with
a 200 volt plate supply.  Pushing it hard, you should be able to get
close to ten watts input for a power oscillator (tesla coil).  What you
really want, is a tube capable of 100 or more watts.

If you're scrounging around, look for horizontal deflection tubes from
TV sets or output toobs in high power audio amplifiers.

Good luck
bob

Tesla List wrote:
> 
> Original Poster: Tesla List <mod1-at-pupman-dot-com>
> 
> ---------- Forwarded message ----------
> Date: Fri, 16 Apr 1999 01:55:06 -0500
> From: Mel Wise <mwise44-at-flash-dot-net>
> To: pupman <tesla-at-pupman-dot-com>
> Subject: Tubes----
> 
> Can anyone tell me if any of these tubes can be of any use in a tube
> coil!!
> 35Z5GT
> 50L6GT
> 12SA7
> 12SK7
> 12SQ7
> 3CB6
> 6CG7
> 3DT6
> 3AU6
> 6FQ7
> 5AQ5
> 5CZ5
> 4BZ7
> 6AW8A
> 19AU4
> 5CQ8
> 
> Any help would be greatly appreciated.
> 
> Thanks,
> Chris

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