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Newbie question - Plexi V6 - is v3 the Phase inverter?

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lofl

Post subject: Newbie question - Plexi V6 - is v3 the Phase inverter?

Posted: Wed Jan 27, 2010 10:24 am

Joined: Fri Jan 15, 2010 9:33 am
Posts: 9
Location: NorthEast Ontario/West Quebec

From the layout or schematics, how can I determine which preamp tube is the phase inverter? Should is be a matched and balanced tube? (I'm assuming its v3, closest to the power tubes)
Thanks for your help

Last edited by lofl on Thu Jan 28, 2010 10:00 am, edited 1 time in total.

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Stoo

Post subject:

Posted: Wed Jan 27, 2010 12:58 pm

Experienced

Joined: Sat Jul 22, 2006 2:59 pm
Posts: 480
Location: Vancouver B.C. Canada

Yes V3 is the phase inverter. As to balanced...it's been a source of discussion for years. IMPO you don't need or want a balanced PI. Musical instrument amps were never intended to be "high fidelic". There is so much imbalance in the circuit surrounding the PI and o/p tubes that you'd have to be quite maticulous to get a true balanced o/p.
YMMV
Stew

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coco

Post subject:

Posted: Wed Jan 27, 2010 2:17 pm

Holy Ghost

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada

have to agree with stoo on this. Dont think Jim or Leo looked for matched triodes back inthe day!

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Stephen
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