ruby +/- gem mkII

[bean]

I've been working out my design for a fetzer/ruby and everyday it seems to get a little more involved. Since I have enough parts to do the ruby and gem mkII in the same box, I started thinking it might be neat to actually have the option to blend the two amps together, rather than just toggling between them. Has anyone tried this, and what method did you use? Would it be wise for them to share the same buffer, then split the signal to different paths and join them later with a blend pot? Or, could each route have it's own buffer? Or, is this just not a good idea at all

Something like this:                input
                                                 |
                                              fetzer
                                                 |
                                       common buffer
                                        |                 |
                         100% ruby  --50/50--  100% gem mkII
                                         (blend pot)
                                                 |
                                               out
                                       

[Also Wik]

wouldn't it be "100% Ruby -- 50/50 -- 100% Little Gem"?

[bean]

Yep, that's exactly what I meant to write.

[bancika]

I don't know because ruby uses one 386 for ~0.5w and little gem mk2 has 2 of them of 2W. Blend pot will also change volume when you turn it towards little gem 2 side. Also, to make more difference you can build clean little gem wiithout anything between pins 1 and 8. Since stock ruby isn't very clean this will give you more variation + you can always add little "dirt" with blend