[R-390] Need Resistor info

[Roy Morgan]

At 11:34 PM 5/19/2006, you wrote:
>Hello, got your shotgun loaded, do you?
>
>Vishay? Wasn't their specialty high resistance precision resistors?

Bill,

Yes.  My employer (Teradyne) in the 70's used Vishay resistors as 
instrument standards - 0.1 and 0.05 percent tolerance units costing up to 8 
or 10 bucks each then.  They were chosen for precision and stability, had 
black rectangular bodies and "axial" leads suitable for PC board mounting.

A current DigiKey catalog shows them offering wirewound power and small 
resistors, surface mount devices and aluminum cased wire wound resistors of 
normal tolerances. It's quite possible that they make the high precision, 
high stability ones still but they simply aren't in this catalog.

The Vishay web site, http://www.vishay.com/ indicates that they make all 
sorts of items, including 314 hits for discrete resistors.  Some are rated 
at 0.005 percent tolerance, some are high stability, metal films, 
flameproofs.. and on and on.

>I suppose each of us has got to do what the voices tell us to do, but
>this seems extreme.

There are many opinions about what resistors contribute what to the sound 
of high fi amps and other devices. I can't even repeat in general what 
those opinions are.  I do wonder if a very few low noise resistors in the 
front end of an R-390A or other receiver might reduce it's self noise just 
a bit.

Roy


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