[HBR] Dissipation factor of materials

[Hopperdhh--- via HBR]

I made a plate coil for a Johnson  Messenger conversion to 75 meters that 
was wound on 3/4 inch PVC pipe (1  1/16 inch OD).  The winding was 31  turns 
No. 24 enameled wire space wound using No. 28 wire as a temporary  spacer.  
This gave 17.9 uH with an unloaded Q of about 225.  Not bad  for a small 
coil!  This was measured on a Boonton 260 Q-Meter.
 
A good experiment would be to compare a similar  coil wound on polystyrene.
 
My guess is that the small dissipation  factor of PVC will not affect the Q 
enough to measure.
 
This conversion was posted on AMfone.net several  years ago, but for some 
silly reason I can't register anymore with my aol.com  email address!
 
Dan K9WEK