Vintage Dynaco A-430 Output Transformer – Dynakit Mark II. Original vintage Dynaco A-430 ultralinear output transformer, used in the Dynakit Mark II 50-watt monoblock tube amplifier. Primary impedance: 4,300 ohms center-tapped. Primary winding with ultralinear screen-grid taps. Secondary outputs: 8 and 16 ohms. Designed for push-pull tube amplifier applications. The transformer was tested using a digital multimeter. All primary and secondary winding connections showed continuity, and no unwanted continuity was detected between the windings or to the metal frame. Primary DC Resistance Measurements. Red to Blue: 66.4? Red to Blue/White: 79.5? Red to Green: 22.3? Red to Green/White: 26.6? Green to Blue: 44.1? Green/White to Blue/White: 52.9? Blue to Blue/White: 146? Secondary DC Resistance Measurements. Black to Orange: 0.4? Black to Yellow: 0.5? Orange to Yellow: 0.2? Primary to secondary: OL. Primary to metal frame: OL. Secondary to metal frame: OL. All readings are actual measurements taken from this transformer. These are DC resistance and continuity checks only. The transformer has not been tested in an operating amplifier or under full operating voltage. Good overall vintage condition with normal age-related paint scratches, finish wear, and minor surface oxidation. The original cloth-covered leads are present and show age-related discoloration and wear. Some lead ends have fraying. Please examine all photographs carefully for the exact condition and components included. Condition: Used vintage component, DC resistance/continuity tested only. Full operating performance has not been verified.

One pair of Tango U-608. Output transformer for single-ended tube amplifiers. 2.5k, 5k, 7k. 4, 8, 16 ohm. I have alternatives for you.

LUXMAN OY15-5 Output Transformers Pair Tube Amplifier Vintage Audio Japan Used. We do not mark merchandise values below value or mark items as “gifts” – Japan, US and International government regulations prohibit such behavior. About Importer’s Obligation. Thank you for your understanding. You won’t pay anything extra after checkout.

The stock circuit had four 6550 output tubes in parallel push pull. Stamped codes on base are FT5426433 and 138243E. Please ask questions if you have any. Item has finish imperfections and wear. Only what is pictured and described is included – if unclear, then ask to clarify.

SANSUI HS-5 Pair Output Transformer for Tube Amplifier Vintage Tested & Working. Condition: Pre-Owned Tested and working. Please note that no detailed audio performance tests have been conducted. There are small scratches and signs of wear from normal use. Please check the images for more details. We do not undervalue merchandise or mark items as gifts. Such actions are prohibited by Japanese, U. US and International Buyers – Please Note.

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.

Vintage Triad R-200A power transformer, tested and working. Rated 115V primary, 400V C. At 400mA, plus two 6.3V 3A windings. Shows normal cosmetic wear from previous use.

This 60W toroidal tube output transformer is newly made for high-end Push Pull audio amplifiers. It is an improve version to work with most of the common output tubes. 4 & 8 ohm. 0.1 & 0.2 ohm. 6146B, 6550B, EL34, & KT88.

120 volts AC input US voltage.

Rare, vintage 1950s matched heavy-duty power supply component set manufactured by Union Switch & Signal. This matched trio was carefully removed together from a highly specialized railroad system’s 300V regulated power supply chassis used in railroad control tower operations. This industrial-grade iron is incredibly over-engineered, making it a premium choice for high-end custom tube amplifier builders, audiophile DIY hi-fi projects, or vintage radio restorations. Why this set is ideal for Tube Amp Builders: Continuous Duty Iron: Built to zero-compromise railroad safety standards for 24/7/365 operation without overheating. Vintage Steel Core: 1950s laminations provide excellent magnetic properties and the coveted harmonic compression/”sag” that modern transformers cannot mimic. Ultra-Quiet DC Filtering: The matched L1 and L2 choke coils provide a massive advantage for smoothing out high-voltage ripple, delivering a dead-silent noise floor for sensitive audio circuits. Included in this set:(1). Main Power Transformer: Style HT / Volts: 115 / Cyc: 50/100(2) Matched Filter Choke Coils: L1 and L2 inductors matching the power transformer chassis requirements. All components feature the original, intact Union Switch & Signal identification tags complete with factory serial numbers. Physical Condition: Excellent vintage condition. The iron cores, heavy frames, and original wiring leads are fully intact.