MW>      Hello there...I was wondering if you would have any
 MW> information on construction tube amplifiers?  I am building one
 MW> for my home stereo.  If you do not, do you know of anyone who
You should find loads of old engineering books on tubes in many libraries.  
The primary places where tubes are still actively used are broadcast and 
industrial amplifiers outputting KW's of RF.  Through 100 KW, many 
transmitters are 100% solid state these days.  
You might find it interesting to locate some old McIntosh manuals.  Also, the 
same kind of 3 secondary winding distortion cancelling circuits used 
presently on some solid state distortion analyzers for 0.000x% THD plus full 
DC and ground isolation have been used on tube audio PA's, though at a couple 
orders of magnitude higher distortion levels.  
IMHO there's little reason to build a tube audio power amp, unless you're 
trying to replicate the defects of certain Fender guitar amps precisely.  In 
most cases it's cheaper and better functionally to build a solid state amp 
with dramatically greater headroom.  "Tube sound" can be created at lower 
levels requiring less maintenance and cheaper parts.  
I have an old tube amp which might be available if someone is really 
interested in a Mac clone.   
Terry
--- Maximus 2.01wb
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