audio lecture 29, USA 845 vs Russian GM70, high power direct heated triode amplifier tubes

Ғылым және технология

845 and GM 70, so called "hundred watter" are great power tubes for audiophiles and ham radio operators. Because of very high B+ voltage, very careful approach is needed to build. I am not absolutely responsible for any electric shock caused by your mistake.

Пікірлер: 8

  • @user-sh5do6ry4v
    @user-sh5do6ry4v3 жыл бұрын

    ГМ-70 крутая лампа, не каждый её осилит, про ГМ-100 вообще молчу. панельки мне больше нравятся чем байонетные. 1:49 рядом с 6Н3П лежит китайчонок 845В

  • @YoungAhn

    @YoungAhn

    3 жыл бұрын

    Hi, thank you for your comment !

  • @ODJones-zy5ir
    @ODJones-zy5ir5 жыл бұрын

    Been wondering why no one is designing SET amps using the easily-available Russian output tubes, including the GM70, NOS 845s are $1000 each, new Chinese 845B are around $150 each... and good Russian drivers are available that are similar to 6SN7, 6SL7, etc and are still available in huge quantities...or even a single ended amps using Russian GU triodes and pentodes...

  • @YoungAhn

    @YoungAhn

    5 жыл бұрын

    hi, thanks for your comment on my video . I have tried to build SE and PP amplifier using GM-70 long time ago, I'd like to explain why ; my personal opinon. 1 power consumption by heater is too high. 2. needs more HV(+1KV, Very dangerous). 3. Bulb temperature is too hot. 4. inconvenient and unreliable tube socket(845 is bayonet type). tube diameter is too large, needs more space. ~~. Is my answer helpful? thanks. Young

  • @ODJones-zy5ir

    @ODJones-zy5ir

    5 жыл бұрын

    @@YoungAhn well I know the 845 run pretty hot too... I think all of the big triode tubes run high voltage... And they glow pretty bright. It would be nice to find a good Russian triode because of their availability. Thanks for responding to me! Do you have a website that details some of your work?

  • @YoungAhn

    @YoungAhn

    5 жыл бұрын

    Yes it is. I don't have any available website now but in near future. I don't release my important experimental data to public, You can see most of my works on my channel please watch my videos one by one.And I am going to release low wattage(10~12 watts / ch) 845 and GN70 SE amps with authentic power supply circuit design in late autumn.. Keep your eyes on my youtube channel. Thanks. Young

  • @ODJones-zy5ir

    @ODJones-zy5ir

    5 жыл бұрын

    @@YoungAhn Thank you, I have subscribed!

  • @YoungAhn

    @YoungAhn

    5 жыл бұрын

    thank you sir

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