[Amps] Clear Coat on Pi-Net Coil

[Eddy Swynar]

On 2012-02-11, at 11:55 AM, Wayne Rogers wrote:

> Still working on my 4-1000 linear.  I have the pi-net coil wound with #10 
> enameled wire on a 3.5" diameter ceramic form.  Right now I have the wire 
> separated (between turns) with a .1" nylon line, but I want to remove the 
> nylon line and fix the wires on the form.  In the old days we used varnish 
> for this.  Question - what's the best approach now-A-days?  I have Krylon 
> clear spray - will that work?

Hi Wayne,

I always go to the local Dollar Store & stock-up on the biggest, cheapest bottle of CLEAR NAIL POLISH that I can find...

The stuff even smells like the old coil dope that I remember from my early days!

I apply two thick coats, letting the first one dry, of course. I've used it successfully on everything from receiver pre-selector coils, to affixing the turns of a filament choke to ferrite rods on grounded-grid linear amplifiers...

~73~ de Eddy VE3CUI - VE3XZ