[Amps] Is Amps still in existence?

[TexasRF at aol.com]

In a message dated 10/8/2006 10:52:43 A.M. Central Daylight Time,  
w9ac at arrl.net writes:

> OK,  here's a question: any recommendations for a coil former material
> that  can withstand a bit of heat? The 80/160m tank coil in my amp gets
>  quite warm during RTTY contesting -  not hot enough to indicate a  design
> problem, but even a moderate increase in temperature makes  the
> fibreglass tubing former smell quite  unpleasant.

Ian:

How about no form at all?  Can you  increase the wire or tubing size and only 
use a form for winding purposes  only -- then remove the form.  With large 
enough wire or tubing, a  form should not be required unless you have many 
turns.

In the  alternative, I've seen many ceramic coil forms on the surplus market 
from  EF Johnson, Millen, and National.

Paul, W9AC  

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Or, an in between approach if you have a little extra space:
 
A Lexan, fiberglas or similar flat insulator can be cut and drilled  with 
evenly spaced holes to allow the coil to be "screwed" through the holes  thus 
providing two support points for each coil turn. The ends of the coil  can also 
be secured to the insulator or left hanging in air as needed. Drilling  
slightly oversized holes makes the "screwing" job a lot easier.
 
The insulator can then be mounted with skinny standoffs, metal or  insulated, 
to the chassis or side wall as needed.
 
Even 1/8" thick material seems sturdy enough to do the job.
 
73,
Gerald K5GW