Tremolo question

[Leevi]

What are the differences in behavior of the tremolos where only one triode is used
and the tremolos where two triodes are used? Is one of these somehow better or is the solution dependent on
where it will be used?

At least Fender is using both versions:

http://www.webphix.com/schematic%20heaven/www.schematicheaven.com/fenderamps/deluxe_6g3_schem.pdf

http://www.webphix.com/schematic%20heaven/www.schematicheaven.com/fenderamps/champ_vibro_aa764_schem.pdf

/Leevi

[sluckey]

In the Fender circuit, the second triode is always a cathode follower. The CF is usually used when you need to provide more drive current (not more voltage) to the circuit you will be modulating, such as a low impedance cathode rather than a high impedance grid. The CF also provides a lot of isolation between the oscillator and the load. This means that the load or changes in the load will have very little effect on the operation of the oscillator.

So basically, higher drive current, lower impedance, and isolation are the benefits of using the second tube.

[Tiny_Daddy]

I have added a follower to some one-triode circuits with good results. I used a 500V mosfet transistor on a terminal strip.