Less boomy tonestack for 22W 6V6

[jmrckr]

HI !

I built a cool 22W 6V6 based on the D'lite and I opted for the skyliner tonestack pretty much as it is originally in dumble amps like the 124 or the 102 without the jazz switch. I added the mid boost switch on it compared to the D'lite original. But I find it to be too boomy and not as defined in the basses when the mid boost is off ... I have to flip the bright switch on but sometimes it is too bright. What tonestack would solve this problem ? Maybe the original D'lite tonestack ? Or the Tweeked D'lite tonestack ? Or something else ? What do you think guys ?

Here is a picture if it just for fun.

468995974_615315830925041_4988807092947690092_n.jpg

Thanks !

[martin manning]

Some other options would be reducing the size of coupling caps particularly the PI coupling caps, or reducing the size of the cathode resistor bypass caps in the preamp stages.

[jmrckr]

Yeah you are right ! For the cathode bypass caps I already have 5uF caps ... I think I will test some smaller coupling caps on the PI.

[jmrckr]

Any other ideas ... ?

[sluckey]

Speaker can make a huge difference.

[alnight]

So, it looks like you have something like this, yes? My preference is a .01 mid cap, a .001 treble cap, and a 10uf cathode bypass cap on the second stage. Your ear may want something different.

[pdf64]

It's a good idea to use a graphic eq pedal to identify what the problem frequencies are.
How about reducing the value of the bass control cap, currently 0.1uF?

[Guy77]

Reducing the huge .05uf Tone stack cap down to .01 or .02 uf will also help with the boominess .
Two Rock uses the .01uf on some of their builds.

Cheers
G

[renhoff]

In the sketch above, I'd try 250k on the bass and treble controls and 15K for the mid control. Use a 250 picofarad treble bypass cap. If this is the Fender bassman type stack, then I'd use 33 k for the slope resistor and 0.02 caps for the two tone caps. I've gone through a lot of variations and this one gives a fair range on each control.