Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: plexi50 on August 25, 2022, 10:17:13 am

Title: 1965 Marshall JTM 45 On Bench!!!
Post by: plexi50 on August 25, 2022, 10:17:13 am

This is a big surprise for me. Again i'm waiting on all the electrolytics and cap can and other necessities.  The aluminum chassis's were thin in the early years. I'm in amp heaven these day's!

Title: Re: 1965 Marshall JTM 45 On Bench!!!
Post by: plexi50 on August 25, 2022, 10:20:08 am

This one has EL34 power tubes in it. I believe KT66 were also used. Power transformer voltages are present. 407-0-407 A/C. Heater filaments are 3.65 VAC. It produces sound. Bias -38 vdc