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  • 12/10/2021

    Thank you for fast shipping. This is my first tube project. Love it. Tube amps need very very clean power supply, otherwise, it will hum. I had the same issue. So, I disassembled the board and redesigned in a way that heater supply and cathode supply can be connected individually. Heater can take either AC or DC (6.3v 500m amp each tube OR 12v in series-for two tubes). Removed all voltage boost components (transistors and related filtering caps). Also replaced the components with audio-grade resistors and Jantzen cross caps (1uf, input and output). Heater coil is powered by a 12vDC supply Remaining supply is provided from two 12v batteries connected in series (it makes 24v). The ground connections are re-arranged to reduce humming. Now it works like a charm. Can feel a large improvement in performance Thank you

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  • 22/04/2021

    it came fast in good condition with all parts in anti-static bag

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  • 26/08/2018

    Nice little valve preamp. Easy to construct, works at first attempt. After a few mods for more gain and converted into a 4 channel stereo mixer (very easy), I am very satisfied with the results. Finally I achieved the warm an calid sound of electronic tubes into my HIFI sound system!! 100% satisfaction, highly recommended.

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  • 18/04/2018

    Aqui está um Kit muito bem pensado e de construção acessível. Faz falta um guia para ajudar na hora de se montar este Kit, mas o grau de dificuldade também não é nada de impeditivo. Com a caixa fica um conjunto muito atraente, e com uma qualidade sonora .... razoável. Fiquei satisfeito!

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  • 27/09/2019

    Prodotto che funziona bene, fascia bassa economica ma che si distingue comunque. Attenzione la cover di plastica non viene fornita, bisogna comprarla a parte!

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  • 07/02/2018

    Like the blue leds that lit the tubes, looks really good. No documentation supplied but PCB has all information for placement on the silkscreen which is sufficient to place the components correctly. Although a little bit of electronics knowledge is beneficial, at least to know the color codes of the resistors and that some components(diodes, electrolyts, transistors) have to be placed with the correct polarity. The sound is good, nearly no distortion.

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  • 26/01/2020

    Very easy to assemble, correct seller

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  • 22/01/2019

    conforme pedido numero 59029192 (6j1 preamplificador tubo estereo ca12v diy kit) observa-se que na lista de componentes consta o box ou case com os parafusos mas (NAO VEIO O BOX OU) ( case) ou caixa de acrilico para o amplificador 6j1 estereo) sendo que consta na lista...... e nos comentarios de outros compradores esta nas fotos dos mesmos com a caixa box mostrando que contem a caixa... observa-se que eu ja comprei varios produtos do BANGOOD e nunca tive problemas nenhum em faltar nada e nem produto que veio com defeito ....espero resposta ,,,,e aguardo grata FATIMA

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  • 11/01/2020

    Very nice to see, easy to assemble.

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  • 30/12/2018

    montajı yapıldı denedim çok güzel çalişıyor

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