All,
I purchase my Fair Rite 31 cores from Mouser. They stock clamp on as well as
solid cores:
http://www.mouser.com/catalog/catalogUSD/640/937.pdf
Unfortunately, the only 2.4 OD core woth a large 1.4 ID is a 43 mix.
They also stock 61 mix which is good for baluns,
Since I only run 100 watts I use a teflon version of the thin RG174 coax ( I
don't have the designation at hand) for my chokes.
Mike N2MS
----- Original Message -----
From: Russ Tobolic
To: topband@contesting.com
Sent: Thu, 12 Nov 2009 13:49:13 +0000 (UTC)
Subject: Topband: Fw: Re: Coax Choke Balun
Bill;
K4SAV mentioned that obtaining ferrite cores is sometimes a problem. Are you
running high power thus the need for RG213? I only run 100w and am using a
clamp-on ferrite (mix 31) per K9YC's paper. I use a Fair Rite P/N 0431173551
which allows me to loop 6 turns of RG8X through the internal 0.75" opening.
These are available from Newark as their P/N 96B5352 The cost is $5.28 each and
there is no min order with Newark.
Russ, N3CO
_______________________________________________
160 meters is a serious band, it should be treated with respect. - TF4M
|