Re: LF: RE: Iron dust toroids and heating

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

  Hello Clemens,
25 May 2017

I would have done that straight away but I stripped the burnt wire and
Kaptan tape off the middle core yesterday ready to rewind it. I made
a reply a few minutes ago to Stefan re how using the G3YXM LPF didn't
work at all well on the W1VD amp, even on very low power. Apart from
the over heating (of just the middle core) on the W1VD LPF filter when
running more power that I expect it was designed for, it worked fine.
When re-wound I can do the test you suggest though, with my AIM4170,
thanks for that



Best regards,
 Chris  2E0ILY                          mailto:chris@gatesgarth.com


> Hi Chris, 

> It no longer
>>functions as an LPF, and I suspect the T225A-2 toroid is compromised
>>in its crystalline structure, through the very high temperatures, now.

> Can you measure the input VSWR and Z with the filter terminated by a 50 Ohm 
> load?

> 73
> Clemens
> DL4RAJ 


-- 
Best regards,
 Chris                          mailto:dead_fets@gmail.com