About to aquire a Gemini I

[Doug Olitsky]

Hangman-

I'm going to be acquiring a Gemini I this week. Its been in a basement, long forgotten about for over 20 years. I'm going to rebuild it even before I power it up. I'll hit the power supply and all 'lytics.

While I'm in there I'll swap out all the film caps w/ Mallory 150's, any beatup looking resistors and all resistors in pwr supply and bias. Will pull the tone pack and put discreet components like I did for my Gemini II and VT22.

rewire the 7199 for 6U8A

I do have a question about the pwr spply. The Gemini I is quite similar to my Gemini II and I was thinking of beefing up the pwr sppply like I had done to my Gemini II.

Gemini II Pwr Spply filtering beefed up a bit as follows...
80 uf upped to 110uf (2x 220 in series w/ bleeder resistors)
40 uf's upped to 47uf
20uf's upped to 30uf

changed the 470ohm screen resistor to 1k ohm 5watt

On Richie Johnson's (of NY Repair & Guitar) suggestion I put in a 10k ohm 50watt resistor for the screen voltage... to bleed off the excess voltage and get it down to 430v again.

Is it a good idea to give my Gemini I the same treatment or just do as you had suggested in "that other ampeg site" and find a place to mount an axial 80 uf 450v on the tag board, and then use a 50x50 for the remaining 40 uf sections.

*** Gemini II mods for reference ***