2 Mono Single - Ended 45 Tube Audio Amplifiers W/ Tamura Tango Output Transformers




Item History & Price

Information:
Reference Number: Avaluer:7017058Non-Domestic Product: No
Custom Bundle: NoModel: Hammond & Tamura Transformers
Type: Power AmplifiersModified Item: No
Brand: custom hand madeCountry/Region of Manufacture: United States
UPC: Does not apply
Original Description:
2 Single-ended custom 45 triode tube stereo class A audio amplifiers with Hammond, and Tamura transformers. Please check out buyers comments on my amplifiers, to get a second opinion on the sound & quality 
These hand-built stereo amplifiers features:

Bud brand heavy all chassis to better support the heavy transformersOpen clean design, no excess of nuts & bolts, or tight spaces, just open clean simple design. the purest sound comes from a strait line.&...nbsp;This amplifier is set for 110 /120 volts AC onlyElectroCube audio grade Mylar capacitorsPoint to point hand wiring.    No circuit boards in my amplifiers, that are difficult to repair, understand,  and often go bad. If you do not see an under the chassis picture in the listing, the builder probably used a circuit board to save money on the build. Vintage Military grade hum rheostat the best you can purchase. You can use the hum rheostat to balance your tubes.New old stock genuine switch craft brand made in USA RCA input connectorsSuperior speaker 3 way speaker connectorsHammond made in Canada filament transformersHigh voltage new old stock US Military grade Amphenol brand tube sockets, that will last forever,   Not the ones from China most builders use. Because the Chinese tube sockets fall apart with normal use.Heavy spun all aluminum volume knobs, with set screws. Not the cheap plastic ones that break or fall apart.These are the best sounding amplifiers available anywhere, Check what other buyers have said. Single ended output with power & output transformers Made by Tamura. With many amplifiers the power transformer will get very hot. That is because it can be running at the limit for the load put on it. The transformers I use are commercial studio grade and never the hot. I play them all day and they only get warm, because they are over rated for the amplifiers I use them in.
The 45 tube is the most musical tube ever invented,  Beautiful clean clear highs and warm but very crisp bass. You will notice the difference the second it comes on. 
I use some of the best parts that were ever available regardless of what year these parts were produced. Like in these amplifiers, I use tubes from the 1930's,   transformers from the  1950's & 1960's, tube sockets from the 1940's, and other WW2 era vintage new old stock parts. The parts I use were made last for ever. Most of the amplifiers you find today on line, even though they may be assembled in the USA, are made mostly from new Chinese parts, and are very congested and cramped in their design.  I started building my own amps because many of the new amplifiers people buy today just fall apart with normal use --  ( I know as people have ask me if I would repair them) their transformers open up, or the tube sockets break, or many times the RCA connectors come loose, or the screws that hold the speaker wires on strip out -- most of the time they just cannot be repaired. I only hand wire point to point connections my self, and I use new old stock vintage parts made in the USA.  The other reason I build my own amplifiers is I can use some of the best triode output tubes ever made, in combination with a single-ended Class A output design. I can build Amplifiers that were never available for mass production. I also use low-mu triode tubes for sound quality, and to lower the chance of micro phonics like Brook and Fisher did in some of their best quality studio laboratory amplifiers. You can hook your I-pod,  CD player, Am or FM source or phone directly to these amplifiers, and that is all you need for great music. If you want to use a turntable you will need a preamplifier. that will hook up to these amplifiers with no problems.  This auction is for one of the best sounding amplifier designs I have ever made -- my triode 45 amplifier with Tamura output transformers.  I have sold similar 45 triode tube amplifiers on eBay in the past, and the eBay feedback comments went like — "WOW! best amp ever” — "This is the best watt I have ever listened to",  "Only one way to describe the sound of this amplifier: breathtaking". Great sounding amp ~ Good packing ~ Excellent service ~ Thank you!!!  And most recently " Amp has superb build and sound transparency that reveals deeper layers of music". This amplifier will put out about 1-1/2 watts per side to 8-ohm speakers (remember it is the first watt that counts).  To make these amplifiers sound best you should run efficient 8-ohm vintage speakers, like Klipsch, JBL Tannoy, Jensen, Altec and other speakers rated around 20 watts or less. My son runs a pair of Klipsch Heresy with his identical amplifier and it has the power to spare. These amplifiers will not rattle the windows with power, but at normal listening levels it will amaze you, and fill a room with plenty of great sound. Most audio fans like the trade off of Pure class A audio sound, over excess volume that is not necessary to enjoy great music.  To me, the most important part with my 45 tube triode amplifiers, is I am able to use vintage Japanese made Tamura output transformers. These transformers give my amplifiers that magical sound that no other amplifier can match and you can only get from Class A Triode single-ended design. Tamura no longer makes these transformers. the ones I used in this amplifier were made back in the 1960's. These are hand wound inner-leaved permalloy output transformers, and they produce a magical sound that you cannot get from any other transformers. The output transformers are designed for 8-ohm efficient speakers. Sellers that tell you that it does not matter what ohms speakers you connect to their amplifiers are wrong. You should only connect the proper ohm speakers to the corresponding connection.  These Tamura output transformers have a 5000-ohm primary which is perfect for the SE 45 tubes. Some sellers will say you can use several different numbered output tubes in their amplifiers. If that were true transformer manufactures would  not need  to build transformers to match up with the exact output tubes, they could just make a couple of output transformers that would work for many tubes. A 2A3 tube amplifier should have a primary transformer that is 2500 ohms. The 45 tube requires a 5, 000 ohm output transformer. You cannot have a output transformer that would be the perfect match for a 45 and at the same time a perfect  match for a 2A3 tube. It would be a bad mismatch for either the 45 or the 2A3 or maybe both. When you match up the correct Tamura output transformer  to the correct triode tube you get those crystal clear highs and the  very clean bass punch you have been looking for.  My custom amplifier projects start off as raw Bud brand made in the USA metal chassis that I punch out, then sand and finish. I round and shape the corners so they are smooth. This amp is all hand wired,  point-to-point,  by me, I never would use a circuit board, so any part that might fail many years in the future would be easy to purchase and replace. You will enjoy the heavy, quality feel of this amp, the smooth rounded edges on the chassis, and the quality hardware nuts & bolts using lock washers securing the parts. The 8-ohm speaker connections on the back are better quality than with most amplifiers even those costing more money.  It takes me about one week to build one of these from start to finish, and longer to source the vintage top quality parts I want to use. I am an electronics Nerd so to me it is not just an amplifier but an art form, it must look as good as it sounds. This amplifier comes with the used MADE IN THE USA tubes you see in the picture I DO NOT USE THE CHINESE NOCK OFF TUBES. The tubes that come with this amp work great, but since they are used and not new, consider them a FREE GIFT with the amplifier and not part of the auction listing. The tube lineup is two 45 triode tubes, two 6SN7 tubes, and one 6AX5 rectifier. You may someday want to upgrade to new or more expensive tubes and I will leave that to the new owners.     Please check out my other auctions today on eBay as I have listed other vintage audio items, and tube amplifiers you may be interested in. If you purchase more than one of my items I will do my best to combine your items in the same box and pass the savings on to you. Thanks for the read. Alan  
On Mar-21-19 at 07:15:29 PDT, seller added the following information:Some have ask if these smaller amplifiers have the same power and fidelity as the large single stereo amplifier. The answer is yes they do. Each one has an output of 2 watts the same as each side of the single stereo amp. I do not build as many of these as the cost is about twice as much to build. As you can see for these mono block amps I need twice as many parts such as two power transformers, 2 chokes, 2 rectifier tubes, 2 chassis, 2 power cords, 2 filament transformers, and so on. I really like these mono amps ( one for each channel) as you have total separation and control over your music. They can be used by themselves when all you need is mono amplification. On Mar-21-19 at 16:26:53 PDT, seller added the following information:A member ask what speakers.  I use to bench test and break in the amplifiers. I use Klipsch 8 ohm speakers hanks for asking.

Thanks so much for your interest. Alan



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