bias wiggle tremolo on paraphase pi ?

[andrew]

Hello, I really like bias wiggle tremolo and I would like to have one on my paraphase pi. I used the paraphase from Valve Wizard (not the floating paraphase) http://www.freewebs.com/valvewizard/paraphase.html
How would I connect it? With a LTP the tail resistor is disconnected from the ground and attached to the trem circuit. Thanks for any help.

[Normster]

Not familiar with paraphase invertors, but it doesn't look that much different from a Princeton Reverb. (Obviously a different invertor, but still has a free triode to drive the bias wiggler.)

[Andy Le Blanc]

Build a LFO and try out different ways to inject the tremolo signal.

The old schematic heaven had a bargain bin with all kinds simple trem circuits.
Its over at hoffmans el34 world.

there are a couple old fender vibro schematic that are simple.

[tubeswell]

I just incorporated bias-wiggle trem into a cathode-biased output stage - same way as you'd do it for a fixed bias output bias-vary trem - i.e.: through the power tube grid load resistors - only thing is you might need to get the trem voltage output swing a little stronger, because the bias voltage swing tends to get a bit 'soaked up' by the power tubes' cathode resistor.

[d95err]

Tremolux 5e9-a. Paraphase + bias wiggle tremolo.