Tremolo... a Project To Be! Or not..

[makinrose]

If you are referring to Blonde/Brown Harmonic tremolo in TUT-2 and found many early 60's Fender I've built into about half a dozen amps and a number of outboard units. It's a fantastic sounding tremolo but as KOC points out committing 3 tubes to the task is big design choice.  I think you have difficulty getting the same effect from op-amps.  Many pedal companies have tried.  When I build an amp with Harmonic Tremolo it's for player that considers the tremolo central feature.

Hi Guys

Fender's frequency-shift tremolo circuit in the Bandmaster 6G7-A used five triodes but the Concert 6G12 used only four triodes.

Concert has a linear Intensity control (labelled 'L', but now called B)where Bandmaster has a reverse audio ©. Depending on which was built first, the taper change was either to save money or to try to smooth the response of the effect at the extremes of the pot sweep?

The four triode version in the Concert 6G12 is missing stage for buffering the Intensity control....  A very short time latter they moved over to the 6G12a Concert with the five triodes.  I'm guessing that it a bit like what you pointed out in TUT3 with the Bassman....Fender did lots of experimentation during production.  I've actually played both and the five triode version does seem to have more depth but as you said there other changes there too.  Pretty much all the versions I've seen have very little Intensity until the control is turned way up.