Tube DIY Asylum

Posted by Tre' (P) on April 19, 2012 at 20:15:22

In Reply to: RE: Input Transformer posted by gusser on April 19, 2012 at 19:03:14

"The diagram below illustrates how this CCS might be employed in the tail of a long tailed pair."

This would work just fine. Gary Pimms CCS feed by a negative supply (as shown in GSH's post) will work even better.

"In the lower schematic you posted, forcing the input to unbalanced with a jumper wire in the XLR connector would mean half the audio waveform would not be present. It would no longer be an amplifier but rather a half wave rectifier with gain depending on where the bias is!"

All he has to do is connect the undriven grid to ground through a cap and turn it into a long tailed pair phase inverter.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

• http://www.freewebs.com/valvewizard/ccs.html   (Open in New Window)

Edits: 04/19/12