Kalamazoo 2 tremolo intensity

[isaac_teller]

Hello. I've built a clone of the Kalamazoo 2. Works great, sounds great. However there is no intensity control. What would I need to do to increase the intensity without adding a knob(fixed intensity level). Thank you.


https://schematicheaven.net/bargainbin/kalamazoo_m2s.pdf

[sluckey]

There may not be any very simple mod because your circuit is already delivering all the tremolo it can. You can try replacing R5 and C13 with a red LED. This will definitely make the tremolo stronger but may not work in your circuit. Easy to try.

You have a spare triode. Look at some circuits like the Supro 6622. You can set the strength of the tremolo by changing the value of the 220K grid resistor for V4-7.

[tubeswell]

What about increasing the plate resistor to 220k (to get more gain)?

[isaac_teller]

That sounds like a good idea. I'll try it.

[PRR]

I doubt "increasing gain" will get you there.

Is this really using 1-1/2 12AX7s?? What could you do with the odd triode? Seems like Fender had some buffered trem drive.

[shooter]

^^^^
good call, I looked n checked the box that both 1/2's were used, missed that 1st tube 

[isaac_teller]

The version I built used a 6AV6 for the tremolo. There's no unused triode. I lowered V1A cathode resistor to 1K5. It sounds better to my ears.

[sluckey]

The version I built used a 6AV6 for the tremolo. There's no unused triode. I lowered V1A cathode resistor to 1K5. It sounds better to my ears.

That kind of info should have been included in your first post.