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We can provide power transformer which use for 117V, 220V, 230V, 240V.

I dont open information about schematic, parts, transformer using in my amplifier. My brand name is the guarantee to what I do with my production !!!

YouTube channel > Otomon Lab YouTube Channel

Tube amplifiers


Total 407 Items.
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  • Recommendation

101D drive 71A PSE stereo tube amp No NFB special order made

This is the best musical amp which has output under 2W that I have ever made. Using 71A tube, para single end amplifier. Driver tube is 101D, rectifier tube is 83. Regulator tube are 6V6. No NFB !
  • Recommendation

45/2A3 PP tube amplifier pure class A1 * Order made

2A3/45 tube amplifier . All transformers was put inside Wooden box. This is prototype version, all transformers are LUX. Amplifier has 3 blocks with separated power supply.
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  • Recommendation

Passive preamp transformer finemet core attenuator 48 steps * special order made

Special order made attenuator, transformer type with 48 steps, each step is -1.5 db. Transformer core is made from finemet meterial. Step up ratio is 1:2 or 1:1 which is select-able.
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  • Recommendation

[ PROTOTYPE SALE ] 211 SE tube amplifier class A, driver tube 717A 18W output 117V input

Sales price: $ 3,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Prototype sale !!! It is SE amplifie using 211 tube as power tube. Prestage and drive tube are 717A. High voltage version 1000V with vintage LUXMAN OPT. Only one was made, no the same one available.
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45SE tube amplifier * Pure class A 2W with Western German OPT Sacksenwerk

Pure class A 45 tube amplifier using 417A(5842) tube as driver tube. Only 2W of output, no NFB adopted. Output is 40s year Western Germany Sachsenwerk.
  • Recommendation

Ampex 6445 preamp with phono stage output transformer

Sales price: $ 4,800(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Special phono stage preamplifier Ampex, model 6445, phono stage using 12AX7 tube. Power supply use 6V6, 6DJ8 for regulator.
This product is currently sold out.
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[THE ORPHEUS] 211 PSE tube intergrated amplifier with driver tube 300B

Special order made amplifier, using 211 single end Parallel connection of 2 x 211 tube in one channel. Driver tube is 300B. Output is about 35W/channel, it can drive any speaker with excellent sound.
  • Recommendation
  • Limited edition

45PP stereo tube amp with LUXMAN output transformer walnut wood case * 117V input

Sales price: $ 1,450(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
This is 45 PP tube amplifier of new design, using 717A, 6DJ8 tube. Output is 7W class A, walnut wooden case. This is prototype sale, price for new order made is 2000USD.
This product is currently sold out.
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300B stereo tube amplifier class A1, no NFB 8W output * 117V

Sales price: $ 1,950(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
It is stereo SE amplifie using 300B tube as power tube. Output is 8W. Pure class A1, no NFB is adopted. It was made for 117V, but can change to 230V or 100V.
This product is currently sold out.
  • Recommendation

【Prototype sales】 71A PP tube amplifier, pure class A 2.5W

Sales price: $ 1,450(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
This is 71A PP tube amplifier of new design, using 717A as driver tube. Output is 2.5W class A, best matching for high sensitive speaker. This is prototype sale, price for new order made is 2000USD.
This product is currently sold out.
  • Recommendation

71A SE tube amplifier with Western Germany OPT, Bluetooth receiver embedded 230V

Sales price: $ 1,250(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
71A SE tube amplifier with max 1W of power. Can be used as preamplifier, Bluetooth receiver. OPT is 50s year Western Germany, manufactured in WW2 Sachsenwerk. 5842(WE417A) is included.
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  • Recommendation

EXRARE 50s year Malotki CD line, input transformer 1:1.2

Sales price: $ 950(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Very very rare line CD tranformer manufactured by Malotki. Step up ratio is 1:1.2 . Wiring is Western Electric 50' year.
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"The Tesseract 45" SE tube amplifier * Pure class A 2W with Western German OPT Sacksenwerk

Sales price: $ 1,150(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Pure class A 45 tube amplifier using 417A(5842) tube as driver tube. Only 2W of output, no NFB adopted. Output is 40s year Western Germany Sachsenwerk.
This product is currently sold out.
  • Recommendation

PX4/PX25 drive PX25 SE tube amplifier

It is very rare special order made amplifier. You can use both PX4 and PX25 to drive PX25 tube amplifier.
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211 SE tube amplifier class A, driver tube 3A/167M 20W output

It is SE amplifie using 211 tube as power tube. Output is 22W. Prestage tube is C3g, driver tube 3A/167M. High voltage version 1000V with top parts was used. Oil condenser drive in power supply.
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  • Recommendation

71A SE tube amplifier (pre amp) Walnut wooden board, Western Electric OPT, output 1W

Sales price: $ 1,350(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
71A tube preamplifier with drive tube is Western 717A. Output transformer is Western electric KS-8714. Dark vintage sound. 6DJ8, 6V6 was used as voltage regulator, rectifier is 80 tube. Input 230V.
This product is currently sold out.