[Amps] Forms for air wound coils

[Gudguyham at aol.com]

Ok, that is interesting.  Thanks
 
 
In a message dated 7/23/2012 5:28:56 P.M. Eastern Daylight Time,  
k7fm at teleport.com writes:

"Other  than ceramic, can anything else be used as a coil form?"

I just built a  TNT transmitter (Tuned plate Not Tuned grid), using a type 
10 
tube.   The coil form is 3 oak dowels I turned on my lathe.  The old method 
 
of making these rf proof was to "boil" them in paraffin, but I cheated and  
used spar varnish.  I have seen similar forme made using glass.   Cut up a 
wine bottle and use that as a coil form.  It will add class  to the rig.

73,  Colin  K7FM