How I can to increase the gain of Twenty-two-seventh?

[gigimarga]

Hello,

I've built Twenty-Two-Sevenths and i like it, but i want more gain/distortion from it?
How can i do that, without a booster?

Thx a lot!

[demonstar]

Got a schematic?

[gigimarga]

Sorry about the schematic (thx stm)...i forgot to put it...here it is:

http://www.diystompboxes.com/smfforum/index.php?topic=48815.msg363313#msg363313

[slacker]

Have you tried the extra gain mod in the thread you posted a link to?
I don't think you can do much else because the circuit is probably giving you all the gain you can get from it.
I built version 1.2 and it's got plenty of gain for me.

[gigimarga]

Thx slacker...i've built version 1.3 which includes the extra gain mod...i will try to change to version 1.2 and to hear how it sounds...

Do you have a soundclip of yours (especially with the gain maximized)?

[gigimarga]

 

[slacker]

Here's a couple of quick sound clips, the quality's not great because they were recorded using my laptop's mic but they capture the basic sound.

http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/album170/227classic.mp3.html - Classic setting
http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/album170/227scoop.mp3.html - Scoop setting

[gigimarga]

Thx a lot slacker for your kindness!

My 22-7 sounds almost like yours...but you have a better definition of the sound...what amp/guitar was used?
Anyway, I will modify my 1.3 version to your 1.2 version...i think it's better.

[gigimarga]

I modified my 1.3 version to 1.2 version and it sounds much better for my taste, even i lost some gain. I have a better definition on chords and the sound isn't so muffled. When i will have some time i will change the tonestack to one with flat mid response, maybe.

Thx a lot slacker!

[stm]

For a flat tone control response I suggest changing the 3.3n cap in the tonestack for 10n.

[gigimarga]

Thx a lot stm...i will try today!

[slacker]

...what amp/guitar was used?

The clips were done with a strat clone and a Vox Escort 30 amp. The amp is quite bright and doesn't have much bass so that possibly explains why the sound isn't too muddy. Through my Twin there is a lot more bass but the sound still has good definition and doesn't sound muffled.
I've done a "flat" tone mod on mine, it's similar to what Sebastian suggested except that I've put a 22n cap in parallel with the 3n3 cap on a switch. This gives me flat, classic and scoop options.

[gigimarga]

Ok...thx a lot again slacker!

[stm]

...
I've done a "flat" tone mod on mine, it's similar to what Sebastian suggested except that I've put a 22n cap in parallel with the 3n3 cap on a switch. This gives me flat, classic and scoop options.

Yes, using a 3-position DPDT switch you can get three very different but useful tones.  Just note that using a 22n cap in parallel with the 3n3 cap will produce a 3dB hump in the response around 400-500 Hz, not a truly flat response.  A flat-flat response would be obtained by adding a 6n8 cap in parallel to the 3n3, thus totalling about 10n.  Of course the mid-hump sound can be equally valid depending on your tastes, rig, etc.

[WGTP]

Can't the 33k resistor in the first stage be reduced/eliminated and the cap increased for a gain boost? 

[gigimarga]

Thx both of you, stm and WGTP!
I will try to eliminate the 33k resistor today...