as promised: my ruby mod

[birt]

it has a Fetzer Valve in front instead of the buffer (fetzer valve can sound nice and clean right? otherwise i'll change that because i liked the clean sound of my first 2 ruby's)
The fetzer has a switch for more gain.
Then there's the ruby in a set-up with 2 chip like the Little Gem mkII.

the questions:
-Do you think this will work fine?

-I thought about using a dual gang pot for those gain controls. Are there other options?

-Will the gainswitch on the fetzer boost like i want it to? (i noticed an Lpb1 in front of a stock ruby sounds really good but i thought about using the Fetzer because i think it'll be less noisy)

[birt]

*bump*
:?

[javacody]

How about using set values for the gain on the two 386's, and using two Buffer's for preamps? Maybe you could make the first buffer a mini-booster and make the second buffer a Fetzer.

[birt]

How about using set values for the gain on the two 386's, and using two Buffer's for preamps? Maybe you could make the first buffer a mini-booster and make the second buffer a Fetzer.

set values won't do the trick for me, i want to be able to control the gain pretty good

[javacody]

Have you noticed how much louder your Ruby can get if you put a booster in front of it?

[birt]

Have you noticed how much louder your Ruby can get if you put a booster in front of it?

yep, as i said i really liked it with an LPB in front of it.on ROG the fetzer is mentioned as a good concurent of the LPB and i think it's less noisy.
then i saw the ruby with a fetzer instead of the buffer and started drawing this schematic. Maybe i should keep the buffer behind the Fetzer.

I'm trying to make a ruby thats a little louder and has good clean sounds, good rock sounds and good high gain.
this is just a first try to get to that

[RLBJR65]

Birt,

I tried to build the MK2 with a fetzer in front, instead of the buffer but I thought that it sounded better as is. The only mod I did was to replace 1 of the 10Uf caps across pins 1 and 8 with a 1K pot for gain and it sounds really good. I guess you could use a dual ganged pot to controll both or use 2 seperate pots.

Try running 12V as with the Ruby it adds alot of head room but make sure the 386's you are using are rated for at least 12V some are not.

Also with the ic's bridged they get a little warm when cranked. It was well with in their recomended opperating temp. but I put a heat sink on mine anyway just to be safe.

[birt]

Birt,

I tried to build the MK2 with a fetzer in front, instead of the buffer but I thought that it sounded better as is. The only mod I did was to replace 1 of the 10Uf caps across pins 1 and 8 with a 1K pot for gain and it sounds really good. I guess you could use a dual ganged pot to controll both or use 2 seperate pots.

Try running 12V as with the Ruby it adds alot of head room but make sure the 386's you are using are rated for at least 12V some are not.

Also with the ic's bridged they get a little warm when cranked. It was well with in their recomended opperating temp. but I put a heat sink on mine anyway just to be safe.

tnx for the tip!

i was already thinking about using the normal buffer and put some kind of booster in front instead of just replacing it by a fetzer... but i don't really have the time to build it right now because i have some big tests at school and i have to work on my soloproject (i have to make a play of 15 minutes, the text, the lighting, the sound, i have to do it all by myself..i'll get 2 more actors tough)