Gold mine of DI¥ audio tubes schematics from Japan

[Soundhappy]

***** Gold mine of DI¥ audio tubes schematics from Japan *****

Lucky i was to see such extraordinary DIY projects archive with vacuum tubes i share this treasure with all forum members.
Infinite THANKS for hobby amateurs in Japan who patiently scan this MJ magazine articles over the years.
Every month we get new ones available on line in pdf format
lot's of OTL amplifiers , Sakuma San articles
Et cetera

Please enjoy & respect this precious library 🙂

click on direct download link Schematic Treasures: DIY tubes audio articles HOME

and menu and titles Google Translate version in English

どうもありがとうございます
Domo arigato gozaimasu

 

[Zen Mod]

 

[bondini]

Many thanks!

 

[Soundhappy]

One example of diy ECC88 headphone amplifier documentation.
Or interesting 211 triode 18 watts power amplifier link :
MJ1704_(03)211-single-power-amp_SoyaS.pdf - Google Drive

 

[Soundhappy]

and venerable Sakuma Sensei topology with 845 + 211 triodes and interstages transformers

http://www43.tok2.com/home/kirifuri...405_845singlr+211single-blend-amp_SakumaS.pdf

Have a nice day

 

[JoeAlders]

It is indeed a GOLD MINE !! Thanks Soundhappy

 

[kevinkr]

I have some of the magazines, and have always enjoyed looking at the photographs, graphs and schematics. I wish Japanese was not so hard to translate, the few times I have attempted machine translation I got largely gibberish in return.

Fun stuff to look at, and leaves you wondering why they are able to support such a magazine in Japan and no longer in the West, the cultural/educational divide in many ways is larger than we perhaps appreciate. Audio hobby magazines of this quality have not existed here in the U.S. since the about the late 1960s. (Audio Amateur and its successors, along with VTV and Sound Practices were maybe the last vestiges, but were tiny in comparison.)

 

[hpeter]

One example of diy ECC88 headphone amplifier documentation.
Or interesting 211 triode 18 watts power amplifier link :
MJ1704_(03)211-single-power-amp_SoyaS.pdf - Google Drive

i like small tube spud, with opt.

 

[Soundhappy]

i like small tube spud, with opt.

Great ! Me like big triodes spud and 300 B OTL amp

r-tec1502_(2)211-845-single-power-amp-and-VT52-drive-amp_AnamizuT.pdf - Google Drive

http://www43.tok2.com/home/kirifuri/article/2012/r-tec1210_(06)detail-300B-OTL-power-amp_TannoT.pdf

Many thanks!

It is indeed a GOLD MINE !! Thanks Soundhappy

All my gratitude to OLD RADIO BOY for his fantastic titanesque work

 

[Soundhappy]

I have some of the magazines, and have always enjoyed looking at the photographs, graphs and schematics. I wish Japanese was not so hard to translate, the few times I have attempted machine translation I got largely gibberish in return.

Fun stuff to look at, and leaves you wondering why they are able to support such a magazine in Japan and no longer in the West, the cultural/educational divide in many ways is larger than we perhaps appreciate. Audio hobby magazines of this quality have not existed here in the U.S. since the about the late 1960s. (Audio Amateur and its successors, along with VTV and Sound Practices were maybe the last vestiges, but were tiny in comparison.)

In the 70's ,80's and 90's France have L'Audiophile DiY magazine:

index

index

Best regards

 

[hpeter]

845 spud?
whole thing gain too low to use ..?

 

[Soundhappy]

845 spud?
whole thing gain too low to use ..?

Yes you are right.
Schematic only are very " Spud " style with his R input and his dedicated psu.
Second one is the driver stage with cool switch feature if you want try different tubes . Thanks for correction !
My question : could we build 845 , 211 SET output stage like this but on place of next tube
gain stage use autoformer passive gain stage ?
Challenge is to use only one triode without other active gain components.
Something " Spudish " like but not pure Potato amp.
Anyway bear with me 😀

 

[famousmockingbird]

Fahk yes!!

Thanks for the schematics

 

[Soundhappy]

On some rare of the above schematics we don't have all components parameters.
Happyly with component reference on the web we can find all informations.
Just say if you need available equivalent from your local USA or Europe distributors.
Example PMC-518H show is 5H, 180 mA, DCR93 Ohm
Nice 🙂

 

[famousmockingbird]

Roger that

 

[hpeter]

My question : could we build 845 , 211 SET output stage like this but on place of next tube
gain stage use autoformer passive gain stage ?

been thinking about phono pre, with jfet followers driven with step ups (transformer only gain)😱

but 845/211, mind the tube miller C, that will load too much the stepups. (strong treble roll off)
(turns ratio= ^2 impedance ratio 🙁)
you will need to add fet follower in front of tube grids -- that maybe will decrease this problem

 

[JPS64]

@soundhappy

Reihe M55

JP

 

[Soundhappy]

Few DIY articles are for advanced builders and with exotic tubes and transformers
for example this sensei Sakuma Susumu preamplifier

http://www43.tok2.com/home/temasumo/article/2003/MJ0301_(08)CX350pp-pre-main-amp_SakumaS.pdf

but many of the presented projects use wildly available components.
Few my second hand bulky paper old magazines are from 1974 !
Now we can read them on Kindle tablets and be busy and inspired
with digital versions of diy audio vacuum tube knowledge work preservation.
Thanks again to OLD RADIO BOY from Japan
どうもありがとうございます
Domo arigato gozaimasu

 

[Jsixis]

google translate very nice

Lucky i was to see such extraordinary DIY projects archive with vacuum tubes i share this treasure with all forum members.
Infinite THANKS for hobby amateurs in Japan who patiently scan this MJ magazine articles over the years.
Every month we get new ones available on line in pdf format
lot's of OTL amplifiers , Sakuma San articles
Et cetera

Please enjoy & respect this precious library 🙂

click on direct link Schematics Treasures

どうもありがとうございます
Domo arigato gozaimasu

 

[Soundhappy]

Thanks Jsixis first post updated with menu translation in English 🙂