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echo: tech
to: Tom Walker
from: Roy J. Tellason
date: 2003-08-26 20:01:46
subject: not testing memory

Tom Walker wrote in a message to Roy J. Tellason:

->  TW> And Vacuum Tube amplifiers and preamps are still avaialble for 
->  TW> Audio Purists.

-> While I don't put myself in such a category (hearing is damaged),  I 
-> *do* like the sound of the old tube radios that I've worked on.  
-> They seem to have lost the knack for making those somewhere along 
-> the way...

 TW>  Actualy with Solid State amplifiers the sound is too "Pure". We
 TW> over the generations became used to the sound of a less then
 TW> perfect Vacuum amplifier. Those little imperfections lent something
 TW> to the sound and the Humam Ear(Brain) liked it. 
 TW>  But I am now with you. I can no longer hear it so I just sit bank
 TW> and enjoy what I can hear.

Still,  I'm inclined to play a little bit.  I scrounged a board out of an
old UPS -- there was no fixing that one,  it wanted _ten_ batteries of a
particularl type!  I wasn't gonna make that investment just to see if I
could get it working...

Anyhow,  this one board contains a whole mess of power FETs.  Complementary
types,  if I'm reading my numbers right.

So maybe I'll have a go at building a small amp,  using those,  and see if
I can't get that sound back again,  without all the heat and the bulk of an
old tube set.

--- 
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