[Amps] Parasitics can kill

[Carl]

I prefer my wheels to be on the ground!

Ive used a homemade hot knife with a Variac to cut foam at work to space 
microwave antenna panels in prototyping. At home Ive replicated several V-8 
engines when building hot rods and doing engine swaps in other vehicles.

Industrial hard foam works the best altho a bit pricey.

Carl
KM1H


----- Original Message ----- 
From: "k7fm" <k7fm at teleport.com>
To: "Carl" <km1h at jeremy.mv.com>; "Dave Harmon" <k6xyz at sbcglobal.net>; 
<amps at contesting.com>
Sent: Wednesday, September 30, 2009 10:16 AM
Subject: Re: [Amps] Parasitics can kill


> "Hey, thats an excellent application for an otherwise useless item, a hot
> knife for cutting foam."
>
> And, the old Heath electronic switch, which was used to switch inputs to 
> the single channel scopes, is a perfect box for the power supply to 
> operate the foam cutting tool, along with the nichrome wire.  I used that 
> arrangement to make a foam mold for a new fiberglass wheel well for my 
> experimental aircraft.  Works nifty.  I have not had any parasitics since 
> then.
>
> Colin  K7FM
>