Gold mine of DI¥ audio tubes schematics from Japan

[astouffer]

So many seem to be custom made for the project.

 

[Soundhappy]

Headphone amplifier with Korg Nutube by Akihiko Kaneta = Kaneda San 🙂
MJ2109_(06)DC-amp(278)_tube-preamp(2)_KanedaA.pdf - Google Drive

 

[Soundhappy]

Tube audio DIY articles updates HOME

 

[Soundhappy]

+ Update 🙂 r-tec2109_(07)reprint-2A3-pp-power-amp_IshiiY.pdf - Google Drive

 

[Soundhappy]

DIY tubes audio articles update HOME

 

[Soundhappy]

http://green.zero.jp/kirifuri1993/radio-boy/index.html

 

[Soundhappy]

+ 1

 

[Soundhappy]

 

[Soundhappy]

 

[Steve Morley]

Welcome back Soundhappy. Haven't heard from you in a couple of months and was wondering if you were OK.
Best regards, Steve

 

[Soundhappy]

http://green.zero.jp/kirifuri1993/radio-boy/index.html

 

[Soundhappy]

Welcome back Soundhappy. Haven't heard from you in a couple of months and was wondering if you were OK.
Best regards, Steve

Can be alwas better but I am OK 🙂 Thanks for kind words Steve !
Best regards and have a nice day

 

[gillougillou]

Thank you Soudhappy for all these nice projects !

Gilles (FR)

 

[Soundhappy]

@ Gilles and Diyers

Yes ! Wish you a good time on the electronic workbench and listening great music sound !
This interesting precious Diy documentation are on line today but who knows if still available tomorrow ?
Better quickly download articles and save your copy for the backup
..and share with hobby amateurs in the future 😉
My gratitude and thanks to Old Radio Boy San Diyer hero from Japan
どうもありがとうございます
Domo arigato gozaimasu
Have a nice Sunday

 

[Kay Pirinha]

Yes, especially this preamp schematics in #711 appears to be decent!

Best regards!

 

[Soundhappy]

@ Kay Pirinha and Diyers

Generous preamp with two phono inputs

 

[Kay Pirinha]

This is only one of it's clever features. Then have a look at how it's tone stack is implemented and how it can be defeated by the throw of a switch. And any output is of low impedance. Impressive!

Best regards!

 

[56085]

I get the impression that with the tone controls engaged, the signal from the tone controls runs through a compressor/limiter of some kind (1/2 12AU7 for producing the control voltage, compression/limiting by the 6L7).

 

[banat]

Many thanks Soundhapy for great job ! , by searching your links I found for me one very interesting pdf file related to Japanese Mactone manufacture ,
which describe one AB class ~200W PP amp and one ~60W OTL amp , interesting is that both amps share almost the same front end .

 

[Kay Pirinha]

With a tail resistor of just 1k5, it's a short tail pair PI, isn't it?

Best regards!