[RFI] Honda Generator RFI

[Michael Tope]

----- Original Message ----- 
From: "Dan Richardson" <k6mhe at adelphia.net>
To: <RFI at contesting.com>
Sent: Wednesday, March 23, 2005 7:39 AM
Subject: Re: [RFI] Honda Generator RFI


> Mike,
> 
> I am wondering if using a type 73 material would improve things for HF 
> operations? Looking at a chart for various ferrite materials I note that 
> type 43 (which you used) peak impedance is around150 MHz while type 73 
> shows a peak around 25 MHz.
> 
> Comments?
> 
> 73
> Danny, K6MHE

Type 73 appears to be a good choice for HF, but I don't think 
Fair-Rite Products produces it in toroid form. I think it's only 
available in bead form or binocular cores.  I just measured 
an ~12" long ferrite bead balun made with 50 type 73 beads 
slipped over ~12" of RG-142. This choke balun had very good 
series impedance over the entire HF band. 

73 de Mike, W4EF.................