Looking for exciter schematics

[Bill Layer]

Hi 
>
>As best as I can figure it, the audio in the selected frequency band 2
>quadrant multiplies with the original signal causing harmonic spikes. The
>irony of this is that this should, in theory, provide similar enhancement
>properties you can get with a good valve pre-amp. (Note here Eric. I said
>"Similar" not the same.)
>
(Bill climbs atop the soapbox, obviously requiring some effort..)

Interesting thought, but any valve preamp that 'enhances' the sound by
adding harmonics is not a very good preamp. It is important (for sake of
our purposes) that we dispell the notion that tubes are inherently
euphonic. A more correct approach would be to agree that when operated for
intended distortion, tubes are much more inherently musical than SS devices.

Remember these things:

1) If they say their tube amp is 'sweet' they mean a signle-ended section
producing even-order harmonics  

2) If they it has that 'all-out tube sound', they mean it's a push-pull
section (likely AB1) producing odd-order distortion.

I guess what I'm getting at is: Don't believe the hype! (both can't be
right) Tubes can be sweet, agressive or quite transparent; take your pick.

 
Bill Layer
"Quantity has a Quality all of it's own." -JL