Fidelity-Research step-up transformer A multifunctional boost transformer that can be switched from 3 ohms to 100 ohms, has 3 inputs and PASS, and can also be used as a selector for multiple record players. Each gain is equipped with an independent toroidal transformer. The exterior is dull, and there are small scratches (Oikawa Tetsuji)
Main specifications: boost transformer core format/toroidal core input impedance 3Ω, 10Ω, 30Ω, 100Ω, PASS (switching) load impedance 47 kΩ to 57 kΩ frequency characteristics 20 Hz to 30000 Hz W170 × H60 × D180 mm 1.2 kg
Fidelity-Research step-up transformer. A multifunctional boost transformer that can be switched from 3 ohms to 100 ohms, has 3 inputs and PASS, and can also be used as a selector for multiple record players. Each gain is equipped with an independent toroidal transformer. The exterior is dull, and there are small scratches (Oikawa Tetsuji)
Maintenance information: 2024.4.8 operation confirmed
Accessories: none
Main specifications: boost transformer core format/toroidal core input impedance 3Ω, 10Ω, 30Ω, 100Ω, PASS (switching) load impedance 47 kΩ to 57 kΩ frequency characteristics 20 Hz to 30000 Hz W170 × H60 × D180 mm 1.2 kg
The price has been reduced. 2024/2/18 sales price 22,000 yen ※Since it is cheap, it will be handed over as is. MC boost transformer from Fidelity-Research Toroidal windings are used for the ring-shaped core, and the tone is fine, smooth, and moderately thick. The exterior is dull, abrasive, and scratched. Serial 037204 (Tamura Eiji)
Maintenance information: 2024.1.24 Operation confirmed
Accessories: No accessories
Main specifications: primary in 3 to 10 ohms, high 15 to 40 ohms, boost ratio low, 33 dB/high, 27 dB, bypass possible, W64 x H64 x D116 mm, 490 g
※Since it is cheap, it will be handed over as is. MC boost transformer from Fidelity-Research. Toroidal windings are used for the ring-shaped core, and the tone is fine, smooth, and moderately thick. The exterior is dull, abrasive, and scratched. Serial 067203 (Tamura Eiji)
Maintenance information: 2024.1.24 Operation confirmed
Accessories: No accessories
Main specifications: primary in 3 to 10 ohms, high 15 to 40 ohms, boost ratio low, 33 dB/high, 27 dB, bypass possible, W64 x H64 x D116 mm, 490 g
* There is no problem with the operation, but since it is inexpensive, it will be handed over as is. Comes with original box Fidelity-Research step-up transformer for MC. A toroidal winding is used for the ring-shaped core, and it has a fine, smooth, and moderately thick tone. The exterior has dullness and small scratches. Serial 067444 (Satoshi Yonejima)
Maintenance information: 2022.11.25 Operation confirmed
Accessories: instruction manual, original box
Main specifications: Primary in 3 to 10 Ω, HIGH 15 to 40 Ω boost ratio low · 33 DB/high · 27 dB bypass possible W64 × H64 × D116 mm 490 g
It's been maintained! Fidelity-Research step-up transformer A multifunctional step-up transformer that can be switched from 3Ω to 100Ω, has 3 inputs and PASS, and can also be used as a selector for multiple record players. An independent toroidal transformer is installed for each gain. The appearance has a feeling of aging such as dullness and small scratches. Serial 010185 (Hiroki Aso)
Maintenance Information: 2022.4.23 Maintained (SW disassembly contact polished RCA terminal replacement input/output waveform confirmation sound output test)
Accessories: original box
Main specifications: Boost transformer core format/toroidal core Input impedance 3Ω, 10Ω, 30Ω, 100Ω, PASS (switching) load impedance 47kΩ ~ 57kΩ Frequency characteristic 20Hz ~ 30000Hz W170×H60×D180mm 1.2kg
RCA terminals have been replaced! Fidelity-Research step-up transformer A multifunctional step-up transformer that can be switched from 3Ω to 100Ω, has 3 inputs and PASS, and can also be used as a selector for multiple record players. Each gain is equipped with an independent toroidal transformer. The exterior is dull (Sasaki Shota)
Maintenance information: 2022.4.25 maintained (RCA terminal replacement. Switched SW decomposition contacts are polished again, and oxidation/sulfide prevention grease is applied. (I/O waveform check, sound output test.)
Accessories: None
Main specifications: step-up transformer core type/toroidal core input impedance 3Ω, 10Ω, 30Ω, 100Ω, PASS (switching) load impedance 47kΩ ~ 57kΩ frequency characteristic 20Hz ~ 30000Hz W170×H60×D180mm 1.2kg
Fidelity-Research step-up transformer A multifunctional step-up transformer that can be used as a selector for multiple record players, while being capable of switching from 3Ω to 100Ω, has 3 inputs and PASS. An independent toroidal transformer is installed for each gain. The appearance is dull (Oikawa Tetsuji)
Maintenance information: 2022.2.20 operation confirmed
Accessories: none
Main specifications: boost transformer core type/toroidal core input impedance 3Ω, 10Ω, 30Ω, 100Ω, PASS (switching) load impedance 47kΩ ~ 57kΩ frequency characteristic 20Hz ~ 30000Hz W170×H60×D180mm 1.2kg
Fidelity-Research boosting transformer. A multifunctional boost transformer that can be switched from 3Ω to 100Ω, but has 3 inputs and PASS, which can also be used as a selector for multiple record players. Each gain has an independent toroidal transformer. Light scratches on the back, cables and RCA plugs are made of Torrence, input terminals are gold-plated, and ground terminals are replaced with larger ones (Yoichi Murakoshi)
Maintenance information: 2021.6.22 sound confirmed
Accessories: none
Main specifications: Boost transformer core form/Toroidal core input impedance 3Ω, 10Ω, 30 Ω, 100 Ω, PASS (switchable) load impedance 47kΩ to 57kΩ Frequency characteristics 20Hz ~ 30,000Hz W170 × H60 × D180mm 1.2kg