• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

S & C APH 1100 input trannies

Hi you all!
I have 4x SC APH 1100 and I was wondering if putting input transformers in them would be a worthwhile project. the amp itself has a octal socket for ipt but the pinout is different on the ipt I have. Also, I would like to know what you would recommend for best selection out of my ipt's. I have 2x McMartin MP-102 Dual mic pre-amp ipt's, 1x McMartin LD-202 line driver amp, 1x Gardners AF matching transformer MU7526 600 Ohm primary, 2.5/10k secondary, one just labeled ACDC 15385, and one Bozak CMA 481. I would like to use the dual mic pre's but should I buy another to match one of the others I have? I plan to use these in a home audio set-up possibly with occasional PA or DJ use. Could anyone help with the pinout on these? Or tell me how to figure it out myself? Thank you in advance. Zap😀