Topband: Two 2:1 transformers to choose from!!

[Charlie Cunningham]

As I recall, Jim is using 73 mat'l cores. I'd be interested to see what sort
of magnetizing inductance he would have looking into the 2-turn primary and
what its reactance is at 1.8 MHz.

Charlie, K4OTV

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Mike
Waters
Sent: Thursday, August 22, 2013 11:21 AM
To: James Rodenkirch; topband
Subject: Re: Topband: Two 2:1 transformers to choose from!!

P. 7-69 of Low Band Dxing (5th ed.) by ON4UN says a maximum of 4 turns on
the low-Z primary for binocular cores. It might work, but there are other
turns ratios you might try.

Here is a list of turns ratios for those cores I made:
http://www.w0btu.com/Binocular_core_turns_ratios.pdf
If you get a 500 Server Error message, contact me directly and I'll e-mail
it to you.

73, Mike
www.w0btu.com

On Wed, Aug 21, 2013 at 3:49 PM, James Rodenkirch
<rodenkirch_llc at msn.com>wrote:

> I received enuff "info" and thoughts to know I'll utilize the 5:7 winding
> version.
>
_________________
Topband Reflector