Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp Iron
Tuesday, August 25th, 2026
FOR YOUR CONDERATION IS A. WEIGHT: 10 LBS 8 OZ. BENCH TESTED WITH MULTIMETER. CONTINUITY CHECKS OUT ACROSS ALL WINDINGS AND PRIMARY/SECONDARY VOLTAGES READ STRONG AND STABLE UNDER NO-LOAD TESTING. ALL LEADS IN GREAT SHAPE. SOME SCRATCHES ON CASING AS PICTURED. Built to power large commercial/theater tube equipment or massive multi-channel broadcast setups. To put it into perspective, a standard vintage guitar amplifier or hi-fi stereo amplifier usually only requires a 6.3V tap rated between 2A and 5A. A transformer pulling 15.5A + 2.5A is massive “industrial-grade iron” designed to light up the filaments of an entire rack of power tubes simultaneously. It was used to supply heater current for. Large Theater & Cinema Amplifiers: Legacy Altec/Western Electric style multi-tube sound systems designed for movie theaters (where multiple large power tubes like 807s, 6L6s, or KT88s ran concurrently). Broadcast/Radio Transmitter Gear: Station modulation equipment and multi-stage studio amplifiers. Massive Industrial Power Supplies: Centralized laboratory or theater sound system rack power bays. WILL BE PACKAGED WITH EXTREME CARE TO SURVIVE TRANSIT. ANY QUESTIONS, PLEASE ASK.
