※Shipping service. “Fascinating Vacuum Tube Amplifiers: Their History, Design, Production (Volume 1), Reprint Edition” /Over 40 Production Examples/Complete Famous Ball Data/Wireless and Experimental Edition/Supervised by Isamu Asano/1990.4.2 2nd Print Published. The photograph is a sample, so the actual product may be broken, written, etc.
※Shipping service. Characteristics and circuits of 15 famous vacuum tube power amplifier models/genealogy of vacuum tube power amplifier circuits/roundtable discussion talking about famous machines of power amplifies/listening to 7 models of Tama amplifies/Questionnaire to Mr. 8 What is a famous machine for me/ Takesue Kazuma: Memoirs of 30 years of making amplifiers/anthology articles, popular power amplifier production articles/radio engineering companies/1989.12.20 first edition published. The photograph is a sample, so the actual product may be broken, written, etc.
※Shipping service. 10th anniversary commemoration of the first publication · 1st edition = reader visits The appeal of TUBE SOUND/Listen to the supreme WE amplifier 8B+9A/ tubular kit amplifier selected by “sound” /300B single output transformer listen and comparison/2005.11.28 published. The photograph is a sample, so the actual product may be broken, or there may be markings etc.
※Shipping service. Separate volume stereo sound, tube kingdom/special feature = field type unit research/WE16A+555 combination/thorough audition of the latest preamp/putting together a WE91 type kit/published on 2001.11.25. The photo is a sample, so the actual item may be broken, have marks, etc.
※Shipping service. Bessatsu Stereo Sound Tube Kingdom/Special Feature = The Origin of JBL, Listen to 175/375/Thorough Verification of Power Amplifier Capabilities/Latest World Brand Information/2001.2.25 Published. The photograph is a sample, so the actual product may be broken, or there may be markings etc.
※Shipping service. “Audio Vacuum Tube Manual” /Published by Radio Engineering Company/by Ichiki Yoshinori/A revised edition that carefully selects the “All Japan Vacuum Tube Manual” published in Showa 33 for audio applications. S60.7.20 first edition issued. The photograph is a sample, so the actual product may be broken, written, etc.
※Shipping service. Bessatsu Stereo Sound Preservation Edition/ A selection of vacuum tube amplifier masterpieces from yesteryear where you can almost hear “good sounds”! /Macintosh Successive Tube Amps Listening Comparison/Marantz Successive Tube Amps Listening Comparison/Published on 2008/6/30. The photograph is a sample, so the actual product may be broken, written, etc.
One-piece rectifier tube, fishing rod type filament made in China, incorporates the structure of the original WE274 and is well-built. Measurement value 56 (rejected value 40) with replacement box ※ The measured value shows the GM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair Tube 45Special/38142 Compatible Ball Fishing Rod Type Filament Measurement Value 98/92 (Rejection Value 55) Geta Burns, is a bargain because it has decreased ※The pair is GM measured with the tester TV-7 Judgment is based on the value (Yosuke Kojima)
Accessories: none
Pair tube 45Special compatible spherical triode fishing rod filament measurement value 94/86 (rejection value 55) *Pairs are judged based on GM values measured by test machine TV-7 (Kojima Yosuke)
Accessories: none
The price has been drastically reduced. 2024/1/15 sales price 118,000 yen pair tube 45 special compatible ball straight heat triode fishing rod type filament made in America measurement value 90/86 (rejected value 55) with white box*Pairs are determined based on gM values measured by testing machine TV-7 (Kojima Yosuke)
Accessories: white box
Pair tube 45 Special/38142 compatible ball, direct heat triode, fishing rod type, filament measurement value 120/118 (rejection value 55) with original box ※ The pair was determined based on the GM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube 45Special compatible spherical triode fishing rod type filament measurement value 100/92 (rejection value 55) *Pairs are judged based on GM values measured by test machine TV-7 (Kojima Yosuke)
Accessories: none
The large triode print sold in Japan has disappeared, but I think it was made by NEC from the structure. Measured IP value: 45 mA (the best standard IP value for this amplifier is 50 mA) with the original box ※ I checked the sound output with the test amplifier and measured the plate current value, and it has been determined that the operation is good (Kojima Yosuke)
Accessories: original box
※It is inexpensive because it leaves cracks in the VOL. A headphone amplifier that allows you to enjoy the sound of 2 systems: a vacuum tube and a transistor. It has a built-in USB DAC compatible with 24 bit 96 kHz, and it is a blissful item that allows you to immerse yourself in both digital and analog worlds to your heart's content. Scratches on the transformer area are slightly noticeable. Serial 12060066 (Fujisawa Yukishi)
Maintenance information: 2024.6.3 operation confirmed (sound output OK, gaps remain in VOL)
Accessories: instruction manual, power cord
Main specifications: Vacuum tube using a class single headphone amplifier 6BM8 x 2 vacuum tube output 20Ω to 600Ω (45mW to 135mW) transistor output 12Ω to 300Ω (40mW to 135mW) frequency characteristics 10Hz to 50,000 Hz SNR 89dB power consumption 30W size W190 x H150 x D250 mm mass 4.7 kg
The price has been reduced. 2024/5/26 sales price 228,000 yen 2023/10 manufacturer maintenance completed! The flagship stereo power amplifier model with a KT120 push-pull configuration by Sun Valley. An output transformer with a bifiler-wound custom-made by Hashimoto Electric is used. It achieves both a wide range of sound that is pleasant to listen to. This is a powerful power amplifier that can make even vintage speakers sound with modern speakers. The exterior is dull (Hiura Katsuji)
Maintenance information: 2023.10.20 manufacturer maintenance (PT replacement with a brand new product, carrying out energization after returning the remodeled point to a normal state, measurement of voltage of each part and measurement of various characteristics, music playback test)
Accessories: power cable
Main specifications: used vacuum tube KT120 push-pull 55W+55W KT120 x 4 (TUNG-SOL), 12BH7A x 4 (ELECTRO HARMONICS), CV4003 x 2 W400 x H380 x D220 mm 32 kg
Pair tube direct heat triode tube made in Russia measured value 72/70 (rejected value 38) with original box (inner cushioning material has deteriorated) *Pairs are determined based on gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube direct heat triode tube made in Russia measured value 72/72 (rejected value 38) with original box (inner cushioning material has deteriorated) *Pairs are determined based on gM values measured with the testing machine TV-7 (Kojima Yosuke)
Accessories: original box
※Set of 2 (not treated as a pair since the internal shape is different between the tubes) KT88 compatible balls, Russian metal brown, base code: 0210/0601 measured value 56/50 (rejection theory 44) with original box ※ measured values indicate GM values measured with the TV-7 testing machine (Kojima Yosuke)
Accessories: original box
The disposal price has been reduced. Member prices are not applicable. 2024/4/11 sales price 118,000 yen ※It's cheap because it doesn't have a hood. Maintained! Vacuum tube stereo power amplifier. The bright and fresh sound typical of DYNACO is attractive. This is an amplifier I want to play in combination with JBL, Altec, etc. The grill is missing, and there is a feeling of use due to aging (Daiki Goto)
Maintenance Information: 2024.4.11 Maintained (· Block Capacitor 30/20/20 μF Defect Replacement · Stereo/Mono Switch Defect Replacement · Shock Noise Improvement Measures → Spark Killer Addition · Vacuum Tube 7199 Noise Exchange · Mylar Capacitor 390pF Deterioration Replacement 2 · Resistors 1/2 W Deterioration Replacement · BIAS Readjustment · Vacuum Tube Socket and RCA Jack Caulking Repair. *Other operation checks have been performed (measured at 32 to 41 W SP: 8 Ω at rated output AC 100 to 117 V)
Accessories: instruction manual
Main specifications: rated output 35W+35W vacuum tube EL34 x 4 7199 x 2 GZ-34 x 1 W330 x H165 x D240 mm 12.5 kg
Maintained by the manufacturer! Long-established Luxman compact vacuum tube type premain. The neat design and simple operability make you feel like it's a new era, but it has a sturdy finish that is warm and new, such as adopting a traditional OY type transformer. The sharp vacuum tube sound is attractive. There are line marks on the exterior and top surface, and dullness all over (Murakoshi Yoichi)
Maintenance information: 2024.5.29 manufacturer maintenance (BASS, TREBLE volume replacement. Input selector switch contact cleaning, inspection of each part, general adjustment)
Accessories: remote control, power cable, original box
Main specifications: rated output 12W+12W (6Ω), 10W+10W (8Ω/4Ω) vacuum tube ECC83 x 1, ECC82 x 2, EL84 x 4, 3 input lines, Phono (MM compatible) 1 system frequency characteristics 20 Hz to 50 kHz W297 x H162 x D258 mm 11.5 kg
2018 fully restored item. This model omits the MC step-up transformer. The rear speaker terminal has also been changed to one compatible with banana plugs to match modern usability. Although it is a model from the 60s, there is no sense of a faded sound, and it feels like the flat, thick lackstone has been revived energetically. The sound without getting tired even after listening to it for a long time makes me fully experience the luster and warmth of stringed instruments. There are stains all over the exterior, and there are line scratches, fading, etc. on the cabinet (Sasaki Shota)
Maintenance information: 2018.8.25 Maintained (9P socket, SP terminal, RCA terminal, block capacitor, volume/BAL/TCVR, semi-fixed resistor, coupling capacitor, AC cord, resistor replacement. Power SW contact deterioration prevention relay added. SW/VR disassembly, cleaning, solder correction. (Internal and external cleaning, circuit readjustment, waveform check, input/output check, load test, sound output test)
Accessories: copy of the manual
Main specifications: output 10W+10W input terminal AUX1 · 2 Phono 1 · 2 (mm) W470 x H175 x D275 mm weight 14 kg
Power transformer used in MQ60 vacuum tube amplifiers Primary: 100V Secondary: 360V/280mA 100V/350mA 60V/70mA CT-6.3 V/2A W104 × H97 x D87 mm approx. 4.3 kg (actual measurement, not including protrusions) (Yosuke Kojima)
Triode line exclusive vacuum tube premain developed with the novel concept of an amplifier for women. With its compact, exquisite size and high design, it can be used in a variety of situations. The exterior is good with only a small scratch and there is little feeling of use. (Kobayashi Hitoshi)
Maintenance information: 2024.6.1 operation confirmed
Accessories: power cable
Main specifications: output 3W+3W (8Ω) vacuum tubes 6BQ5 x 2, 12ax7 x 2, dimensions W190 x D180 x H135 mm weight 4.7 kg