on 12/2/99 9:18 AM, EDWARDS, EDDIE J at eedwards@oppd.com wrote:
> I have tried 77 mix on audio rectification problems from 14 MHz
> signals and it had absolutely no effect. (I actually thought it might've
> been a little worse!) Whereas the 43 completely eliminated it using same
> size toroid.
>
> Have you really had good results using 77?
You're right. Argh! I get the numbers mixed up. I think it was type 43
that I bought from Amidon and not type 77 (whatever I bought from them
worked in my house). According to my chart from Fair-Rite type 77 is only
good up to about 2 MHz. I don't know how accurate that is since it says
type 43 is usable up to 10 MHz! Oh well.
The material though in the split ferrites and so forth that you can buy from
Radio Shack are not type 43. They are designed more for attenuating VHF
energy which would probably make them type 61 or 68 material.
All these doggone numbers!
73,
Jon
KE9NA
--
-------------------------------------
Jon Ogden
KE9NA
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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