[R-390] I.F. SubChassis carbon resistors.

Tue, 29 Jul 2003 05:08:20 -0000

I use the modern "film" resistors in RF circuits of various receivers all
the time and have never had a problem.  However, for "most of the resistors
in the R-390a you will want to use the 1/2 Watt resistors.  In high
impedance circuits the film resistors should actually be "quieter" though
there are various opinions on that.

73 de Phil, KO6BB
DX begins at the noise floor!
[email protected]
Merced, California
37.18N  120.29W  CM97sh

----- Original Message ----- 

> After checking all the carbon resistors in the IF deck, I found seven that
are way high. The rest are hitting the high limit of the 10% tolerance.
> My collection of NOS 5% carbons are now 10% tolerance or worse. This
doesn't give me a good feeling.
> Would any of the new technology 1/4 resistors be acceptable for RF
applications and have long term stability?
> Bob

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