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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

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Total 1267 Items.
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71A PP stereo tube amp with LUXMAN output transformer 100~117V input
  • NEW
  • Recommendation

71A PP stereo tube amp with LUXMAN output transformer 100~117V input

Sales price: $ 1,300(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
Very very rare 71A PP stereo tube amplifier, using LUXMAN output transformer. Output 4W class A.
This product is currently sold out.

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45/2A3 SE tube amplifier amp
  • NEW
  • Recommendation

45/2A3 SE tube amplifier amp

2A3 tube amplifier with drive tube is 717A. Output is 5W. Can be ordered to change tube to 45, 300B, PX-4, PX-25. Prestage tube can be changed to 6SJ7, 5963 without modification.


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"The Tesseract" 71A tube preamp
  • NEW
  • Recommendation

"The Tesseract" 71A tube preamp

71A tube amplifier with drive tube is 717A. Can order 45 tube as replacement of 71A


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45 SE tube amplifier class A1 driven by 27 tube
  • Recommendation
  • Limited edition

45 SE tube amplifier class A1 driven by 27 tube

45 SE tube amplifier special order made. driver tube is 27 tube. Fixed bias


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"The Tesseract 45" SE tube amplifier * Max 4W
  • NEW

"The Tesseract 45" SE tube amplifier * Max 4W

45 tube amplifier using 717A tube as driver tube.


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45/2A3 SE tube amplifier/headhphone amp driving tube 717A
  • NEW
  • Recommendation

45/2A3 SE tube amplifier/headhphone amp driving tube 717A

45 tube amplifier with drive tube is 717A. Output is 2W. Can be used as headphone amp.


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50SE tube amplifier , class A1: 5W, class A2: 10W
  • NEW

50SE tube amplifier , class A1: 5W, class A2: 10W

Special order made amplifier, using 12AY7 as prestage tube, drive tube 5687, fix bias drive tube 50.. Output Class A1: 5W, class A2: 10W


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

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

Sales price: $ 3,200(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
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
This product is currently sold out.

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Western Electric 715B SE tube amp monoblock x 2

Western Electric 715B SE tube amp monoblock x 2

Special order made amplifier using Western Electric 715B tube as power tube, output is 8.5W. All transformers is ISO (TANGO ) Price is 5500USD , tubes and shipping fee are not included.


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"The Tesseract 300" SE tube amplifier * 9W
  • NEW

"The Tesseract 300" SE tube amplifier * 9W

Sales price: $ 2,500(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
300B tube amplifier using 717A tube as driver tube. Power supply is separated with main amplifier. Input is 100K ohm, output is 8 or 16ohm selectable. Output 9W at 1Vrms input. Tubes are not included.
This product is currently sold out.

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45 SE tube amplifier 717A tube drive with All TAMURA transformer, no tubes include * Perfect sound !
  • Recommendation

45 SE tube amplifier 717A tube drive with All TAMURA transformer, no tubes include * Perfect sound !

Sales price: $ 1,250(Listing price is for payment via Paypal, discount 2% if payment via bank transfer)
45 tube amplifier with all TAMURA transformer, drive tube is 717A.
This product is currently sold out.

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45 PP tube amplifier class A1 with early TRIAD output transformers
  • Recommendation
  • Limited edition

45 PP tube amplifier class A1 with early TRIAD output transformers

Sales price: $ 2,980(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 early Triad ones. max output 5W at 8ohm.
This product is currently sold out.

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Special order made Passive preamp 23 steps attenuator Amorphous core transformer
  • NEW
  • Recommendation

Special order made Passive preamp 23 steps attenuator Amorphous core transformer

Passive preamp using transformer attenuator with 23 step, reduce -60db. Input impedance is 600ohm, output impedance is 10Kohm, step up ratio 1:4.


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"The Tesseract" 50 SE tube amplifier VT-62 drive 50 tube * class A2 10W
  • NEW

"The Tesseract" 50 SE tube amplifier VT-62 drive 50 tube * class A2 10W

Special order made amplifier, using VT62 as drive tube for 50' tube. Interstage transformer is NC-20F. Prestage is 7N7, fixed bias for 50 tube.


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MC step up transformer finemet core with cooper case * special order made
  • NEW
  • Recommendation

MC step up transformer finemet core with cooper case * special order made

Special order made MC step up transformer using finemet core. Sound is great, no signal lost, very musical, detail and rich. Transformer was made from finemet core, you can order Amorphous core.


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300B stereo tube amplifier class A1, AC direct heat 12W output
  • NEW

300B stereo tube amplifier class A1, AC direct heat 12W output

It is special order made stereo SE amplifie using 300B tube as power tube. All transformer are TAMURA, preastage tube is 12AY7, secondary is 6SN7, 6SN7 is driven by Telefulken plate choke.


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