Audio output transformer products for tube amplifiers are manufactured in Vietnam. Core material is imported from nippon. The wire we use is exported to Europe and America. We use new materials and do not reuse them under any circumstances. The high skills of Vietnamese workers have created products with stable quality measured by the keysight machine system. Recommended for use with 300BSE, EL34SE, 6l6SE… Or bulbs with equivalent impedance and capacity. Inductance at 20Hz: 20 Henry. Total weight 3.2 kg (7 lbs). Bandwidth 20hz – 20khz (-0.7 db). Note : The price for 1 pair as shown in the picture. We ensure careful packaging.

Pulled from a WORKING pair of W3M tube amplifiers, driving 6L6GC pairs in each. Amps (which are not included, nor are the tubes) were gone through and recapped last year. I bought the amps for the tubes, as I needed them. Parting out now the amplifiers (and other items from the lot). 1 One of them was custom mounted to the chassis, as they relocated one of the caps. They bent the tab that mounts the transformer to the chassis. I tried to bend it back, but it is solid. They must have a metal bending tool. You will need to rebend. I tried with a strong set of grips, and while it moves, I just didn’t trust myself. Obviously not an issue that affects performance, just the way it is mounted. If you are handy, or have some experience bending metal, you can certainly get it back. 2 other one had some wax on the underside, and the wires. Likely a bad wax cap over the years melted. You can likely wipe it off… I did, and some came off. Didn’t spend too much time with it though (like literally 10 seconds). Should clean up nice. These are superb, working TO-300 transformers. Pairs are getting super hard to find (as are singles). Very heavy, will be double boxed to ensure they make the transit.

Offered here is a vintage Acrosound Ultra-Linear output transformer, Type TO-310, manufactured in the USA by Acro Electronic Products Co. Acrosound transformers are highly regarded for wide bandwidth, excellent balance, and use in classic push-pull tube amplifier designs. The TO-310 is a desirable model for restoration projects and high-quality DIY builds. Metal cover shows cosmetic wear, scuffs, and paint loss consistent with age (see photos). Original cloth-covered leads with typical age-related wear. Leads retain factory number tags, which aid identification. Mounting base is solid and straight. Electrical Checks (DC Resistance). The transformer has been checked for continuity and DCR only using a digital multimeter. Blue stripe? Green stripe: 98.8? Blue? Green: 118.9? Tan #1? Green stripe: 38.8? Tan #2? Blue: 152.9? Tap 1? 2: 0.7? Tap 1? 3: 0.4? Tap 1? 4: 0.4? Readings are consistent with a multi-tap ultra-linear output transformer and indicate intact windings. Continuity and resistance checks only. No signal, load, or in-circuit testing performed. Transformer has not been powered. Genuine vintage Acrosound iron (not a reproduction). Excellent candidate for restoration, tube amplifier builds, or collectors. Please review all photos carefully – they are part of the description. If you have any questions or would like clarification on the measurements, feel free to ask.

Dynaco A-470 ST-70 Vintage Output Transformers Pair for Tube Amplifier.

Vintage early Black UTC LS-55 Audio Output Transformer for 300B or 6L6 tube amp. Used but in good working condition, tested no open coils.

Vintage Tube Amplifier Output Transformers UTC / Western Electric / Thordarson. Up for sale is a pair of Vintage Tube Amplifier Output Transformers. Brand is unknown but appears to be from that very early era of electronic production. Don’t miss out on your chance to grab these rare transformers. Listing and template services provided by inkFrog.

VINTAGE WESTERN ELECTRIC 173D AUDIO OUTPUT TRANSFORMER For Tube Amplifier 173-D. Used but in good working condition, tested no open coils. The WE logo is a new sticker. Important Note to Buyers: I appreciate your interest in my listing! Ve been receiving quite a few low offers, and I want to kindly remind everyone that my prices are based on thorough research of comparable listings. I strive to offer fair and competitive pricing, so I encourage you to consider this when making an offer. Thank you for understanding, and happy shopping!

This 40W 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.

Thank you for visiting my page! This is a single OPT with a primary side of 7K? , ideal for ST tubes such as 42 and GT tubes such as 6F6. Regarding accessories, you will only receive the products shown in the photo. Please see photos and video if available. We will pack the product securely and deliver it safely. International Buyers – Please Note. We do not mark merchandise values below value or mark items as “gifts” Because declared value is insured value. Besides US and Int. Ernational government regulations prohibit such behavior. Japanese mechanical products use 100 volts. A transformer is required if it does not match your country’s voltage. Do your own research and prepare a suitable transformer. We try to describe any items to the best ability and offer you the best values and an good quality. We specialize in Japanese tradition products, so please look at our other items and enjoy feeling Japanese culture! Maybe we can find it for you.

Scott Amplifier / Power Supply Chassis. Here is a description that I found on the internet that appears to match this item. It may be a late Philharmonic (or Phantom Deluxe) Amp/Power Supply Chassis. It is uncommon in respect to the finish on the power transformer and the plug layout for the speaker connections. I have been told that chrome was in high demand immediately preceding WWII and in the later production years, the PTs were black in some models. If you look at the contours of the power transformer, you will see that it matches the more typical chrome counterparts. The interconnect sockets are rectangular instead of round and accept Jones plugs. This chassis is very similar to a Laureate but with the layout and tube compliment of a Philharmonic(or Phantom Deluxe). This chassis is set up for 5U4G rectifiers and a quad of 6L6G output tubes. Tubes are included what you see is what you get. This particular amplifier appears to have been restored in recent years as it has a new power cord, new electrolytic caps on the bottom of the chassis with the (top) originals left in place (one has a broken phenolic mounting wafer) and a few new capacitors. The underside of the chassis is clean and the wiring looks very nice. The top of the chassis is poor to fair in my opinion, there is moderate pitting on the Chrome chassis, the filter chokes and the cover of the driver transformer look pretty good, please look at the pictures and judge for yourself. The person who we got the amplifier from left the radio chassis and case behind and when he went back for these items per my request, they were long gone. The tubes appear to be as follows. 2 each 5U4GB rectifiers and 4 each 6L6G (or equivalent) output tubes. I suspect this item is probably functional but I have no way to test it. I will package this item carefully in a sturdy box to insure that it arrives in the same physical condition as seen in the pictures. I will remove the 6 tubes and package them in another box and box them with the amplifier. This amplifier / power supply assembly is a fine example of American made high quality radio equipment and was hand built with the state of the art technology of its time and the finest American made parts that were available. The pictures form part of the description.