IWISTAO Tube FM Radio Super-regenerative Handmade Nostalgia Radio 6J1 FU-25 AC12V Power Supply

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Tube FM radio tuner

IWISTAO Tube FM Radio FM Super-regenerative Handmade Nostalgia Radio 6J1 + FU-25  (or 1625) AC12 Power Supply Model No: WVT-R08   In fact, just a nostalgic mood! When you put the tube FM radio on the desk and savor it, or when you put the headphones into it, turn tuning knob to...
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IWISTAO Tube FM Radio FM Super-regenerative Handmade Nostalgia Radio 6J1 + FU-25  (or 1625) AC12 Power Supply

Model No: WVT-R08


In fact, just a nostalgic mood! When you put the tube FM radio on the desk and savor it, or when you put the headphones into it, turn tuning knob to listen, it seems to have returned to the old days of childhood, everything becomes more and more comfortable at the moment, at this moment, broadcast content has become less important, it is important that but it is one with the thoughts that fly mood. . . . . .

This tube radio has two tubes, which adopt super-regenerative mode to receive FM radio signals. Has high sensitivity, Either high impedance headphones with nostalgia, but also through the line output jack. You may connect it to amplifier and computer sound card to access the playback, that expand the scope of application of the radio.


IWISTAO Tube FM Radio Nostalgia Super-regenerative Handmade from IWISTAO HIFI AUDIO on Vimeo.


Note: the tube FM radio adopted an ancient technique and don't have high sensitivity of IC FM radio, please do not compare with modern digital radio technology, if you mind the ancient technique of FM radio, please don't buy it. If you buy it, it means you accept the term above.


1.    First single-supply low voltage input just used an exchange of AC 12V / 1A transformer, which can solve the issue for tube power supply that has always been complex, multi-group voltage power transformers.

2.    Particularly mentioning, this radio adopt a special technology to solve the human body during induction tuning, making this troubled super-regenerative FM radio body sensors has basically ceased to exist.

3.    This radio station is unique tone; tuning knobs need to meet adjusting the screen voltage knob together, so that sound is on the best status.

4.    More convenient, eliminating the need to set up more difficult antenna ground, just a 1 meter wire only, you can get perfect reception of FM signal.


User Manual

In order to transportation safety, the big tube FU25 (or 1625) has been pulled as a separated package from the radio when receiving.


  1. When you receive the radio and want to let it work, please take the screen pole ceramic cap off the package carefully and then take the big tube from the box.
  2. After insert the big tube to the radio correctly and carefully with right pins align (Big pins to big holes), please fix the screen pole ceramic cap on the top of big tube.
  3. If use a headphone to listen radio, please use an old high impedances (2 * 2200 ohms) only. Pay attention, its plugs is banana plugs, if there are not this kind of plugs, you shall modify them to banana one. If you want to connect an amplifier, please connect cable to line-out as the picture showed.
  4. On contact terminal of the antenna, please connect a 1~2m wire as FM receiving antenna.
  5. Then, please connect AC 12V power adapter to the radio, there is not plus or minus for this AC power adopter.
  6. Adjust tuning knob and screen voltage at the same time, to select and listen radio. If the effect is not good at the place, please change the place and try it again.


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