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

YouTube channel > Otomon Lab YouTube Channel

I will give discount 10% or more for all item in my eBay listing, contact me for more detail

Special Order Made


Total 288 Items.
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Attenuator transformer for speaker 200Hz~
  • NEW
  • Recommendation

Attenuator transformer for speaker 200Hz~

Sales price: $ 700(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Speaker attenuator transformer, 12 steps
This product is currently sold out.

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C3g-71A tube pre-amplifier, Wenger wood case, voltage regulator 6DJ8-6V6
  • NEW
  • Recommendation

C3g-71A tube pre-amplifier, Wenger wood case, voltage regulator 6DJ8-6V6

71A tube preamplifier with drive tube is C3g. Output tube can be changed to VT-25, VT-52, 45, 50 tube. Luxury Wenger wooden case.


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【Prototype sales】 Only 1 limited 45SE tube amplifier amp with Jorge Schou OPT, West Electric wire
  • Recommendation

【Prototype sales】 Only 1 limited 45SE tube amplifier amp with Jorge Schou OPT, West Electric wire

Sales price: $ 1,385(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
This is 45SE tube amplifier of new design, using C3g as driver tube. There is only one available because it is impossible to get Jorge Schou transformer again. No NFB schematic, pure sound of 45.
This product is currently sold out.

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"The Tesseract" 417A-2A3 SE prototype tube amplifier 3W output * All transformer are LUX
  • NEW
  • Recommendation

"The Tesseract" 417A-2A3 SE prototype tube amplifier 3W output * All transformer are LUX

Sales price: $ 1,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
2A3 tube amplifier with drive tube is 417A. Output is 3W. All transformers was put inside Wooden box. This is prototype version, all transformers are LUX. Deluxe Walnut box 30mm thick was adopted.
This product is currently sold out.

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Finemet attenuator transformer for speaker SA-300 200Hz~
  • NEW
  • Recommendation

Finemet attenuator transformer for speaker SA-300 200Hz~

Sales price: $ 650(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Special order made speaker attenuator transformer. Finemet core was used, very very good quality sound.
This product is currently sold out.

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TANGO attenuator transformer for speaker SA-300 200Hz~
  • NEW
  • Recommendation

TANGO attenuator transformer for speaker SA-300 200Hz~

Sales price: $ 550(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
TANGO SA-30 speaker attenuator transformer
This product is currently sold out.

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Special order made EL-156SE tube amplifier

Special order made EL-156SE tube amplifier

Special order made amplifier using EL-156 as power tube. Interstage transformer was used to drive EL-156 tube. Very beautiful , detail and musical sound.


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45 PSE tube amplifier with driver tube 71A Wenger wooden case
  • NEW
  • Recommendation

45 PSE tube amplifier with driver tube 71A Wenger wooden case

This is 45PSE tube amp (can be used with 2A3), special order made with driver tube 71A and Wenger wooden case. It is one of the best 45 PSE tube amp I have made.


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45 PSE tube amplifier with driver tube 42 walnut case
  • NEW
  • Recommendation

45 PSE tube amplifier with driver tube 42 walnut case

This is 45PSE tube amp (can be used with 2A3), special order made with all ISO (TANGO) transformers. It is one of the best 45 PSE tube amp I have made.


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71A PSE stereo tube amp No NFB special order made Wnger wooden case
  • NEW
  • Recommendation

71A PSE stereo tube amp No NFB special order made Wnger wooden case

This is the best amp which has output under 2W that I have ever made. Using 71A tube, para single end amplifier. Driver tube is C3g, rectifier tube is 83, can be changed to 80. No NFB was used !


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211 SE tube amplifier class A1 monoblocks 25W output
  • NEW

211 SE tube amplifier class A1 monoblocks 25W output

It is SE amplifie using 211 tube as power tube. Output is 22W. Drive tube is C3g. High voltage version 1000V with top parts was used. Oil condenser drive in power supply.


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Special order made 300B PSE tube amplifier monoblock 20W power
  • NEW

Special order made 300B PSE tube amplifier monoblock 20W power

Special order made amplifier, working as para single end, power tube 300B, driver tube VT-62/CT-25A or 10Y. Output is 20W


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C3g-71A tube pre-amplifier, Wenger wood case, voltage regulator 7233-6V6
  • NEW
  • Recommendation

C3g-71A tube pre-amplifier, Wenger wood case, voltage regulator 7233-6V6

71A tube preamplifier with drive tube is C3g. Output tube can be changed to VT-25, VT-52, 45, 50 tube. Luxury Wenger wooden case.


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300B PSE (SE) tube amplifier with output power 18W
  • NEW

300B PSE (SE) tube amplifier with output power 18W

300B para single tube amplifier with output power 18W (input 1Wrms), all transformers are HIrata TANGO special order made. Fixed bias. You can use one 300B tube in each channel as single end tube amp


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45PP stereo tube amp with LUXMAN output transformer wenge wood case * 117V input
  • Recommendation
  • Limited edition

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

Sales price: $ 1,450(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Extra rare 45 tube amplifier, working in class A1 push pull. Output transformer is Luxman OY series. Output is 7W class A.
This product is currently sold out.

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Special version 71A PP stereo tube amp with LUXMAN output transformer 50s year Western wiring
  • NEW
  • Recommendation

Special version 71A PP stereo tube amp with LUXMAN output transformer 50s year Western wiring

Sales price: $ 1,650(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Only one was made ! Western wiring was out of stock and no other one available. 71A PP stereo tube amplifier, output 3W class A. 71A tubes are not included.
This product is currently sold out.

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