Chuck,
thanks for that information. I wonder if anybody knows if those 0.61" ID
would somehow fit LDF4-50A? I figured the next ones in ID are 0.75"!
And is it OK to use short toroids instead of beads for balun? Does it make
the balun any less efficient when threre are 20-30 toroids instead of 4-5
beads??
73
Tonno
ES5TV
----- Original Message -----
From: "Chuck Counselman" <ccc@space.mit.edu>
To: <towertalk@contesting.com>
Sent: Monday, October 07, 2002 9:20 PM
Subject: Re: [Towertalk] Large Ferrite Beads?
> At 5:00 PM +0300 10/7/02, Tõnno Vähk wrote:
> >can anybody help me in finding ferrite beads that can be slipped on
Heliax
> >LDF4-50A? ID has to be 0.63" but the biggest ones I see in web are 0.5"
ID
> >(Amidon page, etc...) I want to make baluns for my stacked tribanders.
>
>
> In April 2002, Amidon quoted to me:
>
> Fair-Rite Amidon _Dimensions (inches)_ _AsubL__
Price
> Part No. No. (????) Qty. O.D. I.D. Thick (nH/T^2)
(each)
> ---------- ---------- --- ----- ----- ----- -------- ----
--
> 5977006401 FT-100-77 200 1.000 0.610 0.500 2500
$0.63
> 5943006401 FT-100-43 200 1.000 0.610 0.500 850
$0.65
>
> Now, 0.610 inches is 0.02" smaller than you want, but maybe you could
> shave the jacket of your Heliax(R), or ask Amidon for larger sizes.
> I believe that Fair-Rite makes them.
>
> 73 de Chuck, W1HIS
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