Professor Tweed and Umble tweaks

[kurtlives]

Nice, I like the tone.

Not Dumble tone though, good tone none the less.

Your not going to get Dumble like tones with that topology unfortunately.

[Uma Floresta]

Nice, I like the tone.

Not Dumble tone though, good tone none the less.

Your not going to get Dumble like tones with that topology unfortunately.

Thanks - actually I was trying NOT to get Dumble tones. I was going for a Tweed Deluxe tone!

[Uma Floresta]

Thanks for the clips ! Cool sounds  I like the modded umble very much.

I got the build ready with 100n on first and last coupling positions. I had to sub the two (lacking) 22uF as 33uF's. I have the tone maxed but the sound is too dark with my amp. The low strings when played simultaneously makes a very ugly harmonics- tho that might be my amp also. I'll change the first coupling cap to the original 22n and the electrolytics to 22uF and see how it turns out. Btw. it is really hard to bias the last 5457. Turning the 100k trimmer as little as possible jumps the voltage say from 3.5V to 6V. Also the sound changes alot depending of the slightest movement of the trimmer.

Btw. my guitar is Gibson 339 with old school humbuckers. The guitar is guite midrangy.

Mat

Often times a bad or farty sounding gain from one of these things is the result of a JFET not being biased optimally. Now, in my opinion, they sound best if you bias them by ear, not to exactly 4.5v. You're right about it being tricky to bias though - some JFETS are almost impossible! I've heard if you use a lower value trim pot it can help.

Also, I made that mod with Tele as my reference point - so 100n may indeed by too much bass for your guitar.