Re: LF: Take care lads, grass fire here...

[Chris Wilson <dead.fets@gmail.com>]

Hello Andy,

Well,  I  have seen the evidence you know all about LF fires ;) Thanks
for the tip, will use an insulator each end, cheers.

Friday, June 23, 2017, 3:58:25 PM, you wrote:

> Never use nylon as an RF insulator,  it's horribly lossy.  Back in
> the 73kHz days I used nylon strimmer cord  as an insulator for my
> Tee antenna; 200Watts and about 15kV on the antenna.  One day , in
> wet weather, after a prolonged transmission Pout suddenly dropped
> and I saw the antenna had fallen down.   The nylon had just melted. 
> Presumably a combination of lossy material and damp helping tracking.


> Replaced with a decent ceramic dog-bone at each end and its been fine ever 
> since - nearly 20 years



> Andy  G4JNT





-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com