[Amps] Nylon in RF Tank Circuits

[Roger (K8RI)]

PTFE is poor structurally and tends to cold flow under stress.
I used a lot of it in induction heating generators, mainly for spacers.

73, Roger (K8RI)

On 6/10/2019 4:14 AM, Andy GD0TEP wrote:
> I have nylon spacer bars in C1 & C2 in my commercial made GS35b amp, (4 in each cap) and every one of them shows signs of heat stress (melting & burning) I'll swap them out one day for PTFE, but haven't got there yet...
>
> 73
> Andy
> http://gd0tep.com
>   
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of MU 4CX250B
> Sent: 07 June 2019 22:53
> To: amps at contesting.com
> Subject: [Amps] Nylon in RF Tank Circuits
>
> For decades I’ve avoided using nylon hardware in the vicinity of an RF
> tank circuit because I believed nylon was prone to absorbing RF and
> burning. I don’t know how or when I came to learn this information,
> but now I’m wondering if I’m wrong. Normally I use  brass hardware.
> Had anyone else heard this caution?
> Tnx,
> Jim W8ZR
> Sent from my iPhone
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-- 
Roger (K8RI)