I recently "liberated" a toroid that is on every CRT monitor cable from
its molded-on plastic covering: it is a little over 1-inch long by
about 0.7-inch outside diameter, and its internal diameter is a fraction
too small for RG/8, but RG/58 and RG/59 fit without any difficulty.
Might its characteristics be any good for any ham use?

--
--Myron A. Calhoun; 2001 Dunbar Road; Manhattan, KS 66502-3907
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member and Rifle, Pistol, & Home Firearm Safety Certified Instructor
Certified Instructor for the Kansas Concealed-Carry Handgun license

On 17 Feb 2007 22:04:56 -0600, wrote:

Might its characteristics be any good for any ham use?

Hi OM,

Put a loop of wire through it and attach the wire to an antenna
analyzer, if you have one, and measure its resistance at any
particular frequency.

73's
Richard Clark, KB7QHC

Those tend to be good up through at least VHF for keeping down RF
noise. I have used them on USB cables, and also on some APRS units,
with good effect. They are made so that trying them on an application
is easy, and unlikely to do any harm.


--
Alan
WA4SCA

In "Experimental Methods in RF design" they are cited as an excellent
source of toroids for oscillator coils with a call out for the number
of turns on a specific oscillator...

denny / k8do