- Original Message -
From: "Jim Brown"
To:
Sent: Wednesday, August 31, 2011 10:34 AM
Subject: Re: Topband: Fabricated common mode chokes - Sourcing
> On 8/30/2011 10:30 AM, ZR wrote:
>> Did you open up a Cushcraft balun to discover that method? I believe some
&g
> As to charring -- that's an issue if the device in question is seeing a
> lot of dissipation. Properly designed and applied, chokes should NOT
> see a lot of dissipation unless they are being used in series/parallel
> combinations to do impedance transformation.
>
> 73, Jim Brown K9YC
OR, if th
On 8/30/2011 10:30 AM, ZR wrote:
> Did you open up a Cushcraft balun to discover that method? I believe some
> other companies do similar and Teflon wire is used so it doesnt char as does
> THNN.
"These methods" are well documented in the literature, especially Jerry
Sevick's work (W2FMI). In one
Paul N1BUG said : Mouser has the Fair-Rite 2.4" #31 core for $7 each. That is
the lowest price I have found for small quantities.
--
Last week I purchased the 2.4" O.D. 31 mix cores (Fair-Rite part number
2631803802) from Arrow Electronics, and the single quantity p
Fabricated common mode chokes - Sourcing
>A year or two ago, based on the experience of some hams in the UK who
> found Fair-Rite cores either impossible to obtain or very expensive, I
> did some more experimental work that resulted in designs for
> transmitting chokes that can be woun
On 8/30/2011 10:30 AM, ZR wrote:
> Did you open up a Cushcraft balun to discover that method? I believe
> some other companies do similar and Teflon wire is used so it doesnt
> char as does THNN.
There are baluns and there are common mode chokes. I'm talking about
common mode chokes. Some so-
Hi Lloyd,
Unless the type F material is far more effective than 31 material,
why pay $20 each? Mouser has the Fair-Rite 2.4" #31 core for $7
each. That is the lowest price I have found for small quantities and
is where I get mine. Part number 2631803802. Pay no mind to the
picture on the Mouse
A year or two ago, based on the experience of some hams in the UK who
found Fair-Rite cores either impossible to obtain or very expensive, I
did some more experimental work that resulted in designs for
transmitting chokes that can be wound on a single #31 core, be very
effective from 80-10M, an
___Original Message_
From: Lloyd Berg N9LB
Date: Mon, 29 Aug 2011 Time: 17:00:21
>I'd like to build up several toroid chokes for 160, 80 and 40 meter use.
Lloyd
Take a look at this:
http://www.ifwtech.co.uk/g3sek/in-prac/
and this:
http://ww
Hi Tod!
Thanks for the data.
I'd like to build up several toroid chokes for 160, 80 and 40 meter use.
I looked at the Fair-Rite site, no 31 material.
I looked at their vendors and went to Amidon
...amidoncorp.com/items/19
Amidon does have "F Material Ferrite Toroids"
" High Saturation flux densit
10 matches
Mail list logo
