[Amps] High temp magnet wire?

[Jim Klein]

I use 20g for my YC-156 choke works fantastic..Jim..K7RDX....

On Mon, Dec 3, 2018 at 8:36 AM Jim Thomson <jim.thom at telus.net> wrote:

> Date: Sun, 2 Dec 2018 11:20:35 -0500
> From: "Tim Duffy" <k3lr at k3lr.com>
> To: <amps at contesting.com>
> Subject: [Amps] High temp magnet wire?
>
> <Looking for #20 high temperature magnet wire - sometimes referred to as
> <Thermaleze.
> <Any ideas?
>
> <Need high temp rating for a plate choke rebuild.
>
> <Tim K3LR
>
> ##  I tested  22 gauge  plane jane magnet wire, with my current limited
> lab supply, and  ran  5 Amps  CCS through it for  1 hr, stone cold.
> 22  gauge was used on a buddys  3x6 amp, all bands.
>
> ##  20 gauge will handle even more.   The RF current through the plate
> choke
> is miniscule at best.  On the lower bands, like  160-80-40-30m, the plate
> choke
> ends up being parallel  resonated with the tune cap, so the chokes Z
> skyrockets.
> Thats the extra tune C required, when using less than optimum choke uh.
> The chokes
> XL needs to be cancelled out with an equal amount of  XC...from the  tune
> cap.
>
> ##  27 gauge runs at ambient room temp, with 1.5 A  CCS  flowing.   With
> 1.6A, it gets warm,  1.7 its hot.  1.8  its stupid hot,  goes into thermal
> runaway..fast.
>
> ##  I tested  24 gauge, but cant find my  results from testing. Suffice to
> say, 24 gauge  will
> handle a lot more than  27 gauge.
>
> Jim   VE7RF
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>