[R-390] Resistors, noise, etc.

[Roy Morgan]

At 11:04 AM 1/3/2006, Kenneth G. Gordon wrote:
>Roy Morgan wrote:
>...very very few of us live in
> > places where the received noise level is low enough so that the noise
> > generated in a receiver is of much matter at all. ...
>Actually, there are TIMES, even on 160 meters, when the external
>noise level IS low enough to hear receiver noise.

I appreciate Ken's observation. I live in a very built-up area, and though 
the power lines in my neighborhood are underground, it is a very short 
distance to some medium and high power lines.  Maybe it's the cell phones, 
computers and TV's that make such a  racket around me.  Of course, the 
lights on dimmers that our older daughter cannot ever turn OFF are the 
worst offender.

There is a hope in our family that we can move out to a much more rural 
area.  The horses that will be around us won't make any electrical 
interference that I know of.


> > As I understand it, carbon composition resistors are favored by the high fi
> > builders for low noise and for other differences they hear in the 
> sound. ...
>A recent article in ER magazine by Ray Osterwald on the restoration
>and enhancement of the SX-101A covered resistor noise in quite good
>detail.

I need to renew my lapsed subscription, and I look forward to Ray's 
articles.  I have an SX-101A here to restore, also.

>  HE says that carbon comp resistors are the noisiest, and has
>data to prove it.

Wonderful.  His having tried some experiments or gathered data will help us 
all decide what to use.


Thanks,
Roy

- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
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