Gemini II questions

[johnnykuz]

I have 7 old Ampeg amps ranging from a '58 Jet to a '69 Gemini 20. The Gemini 20 is the only Ampeg I have ever seen with 6L6's, every other Ampeg I have has 7591's including the '67 Gemini II (G-15) that I recently purchased. You did not indicate the year of the amp in your original post so I'm at somewhat of a loss in terms of whether or not 6L6's are oddball in your amp.