Gold mine of DI¥ audio tubes schematics from Japan

[JoeAlders]

That picture on the right :
they look (to me) like transmitting tubes 😀
Great advantage is that you do not need an extra light to read a book.

 

[Soundhappy]

Yes read a book about Eimac tubes 😀
https://frank.pocnet.net/other/Eimac/Eimac_1969_Quick-Ref.pdf

http://w5jgv.com/downloads/Eimac-1975.PDF

 

[JoeAlders]

Ahh, Eimac tubes! Have read a long article about this brand in one of the magazines of the Tube Collectors Association (TCA). Forgot which issue it was.

 

[Soundhappy]

MJ1104-1502_(5)Eimac-100TH-single-mono-power-amp_YanagisawaM.pdf - Google Drive 🙂

 

[lilstripe]

Looks like I'm going to need to learn Japanese. There is so much good info out there in a language I can't begin to read...

 

[Soundhappy]

Pictures of point to point amplifiers wiring are instructive 🙂
1 part update february 2018

 

[Morde]

Thanks to Soundhappy for posting these links and stuff. My eye was caught with this PP tube headphone amp: MJ1801_(04)5670WA-pp-headphone-amp_YanagisawaM.pdf - Google Drive

What do you tube experts say - would it be worth the effort to build? Any design flaws?

I'm afraid that the Noguchi output transformer PMF-8P-10K is not available in europe. What would be a suitable replacement?

 

[ChrisABC]

lots here:
(try google translate)
schematics, layouts, etc.
????????????????

--

Tube links
Index of /inf/Amplifier
Valves' World ?????
Projekty lampowe
http://fonar.com.pl/a_index.htm
https://robrobinette.com/How_Amps_Work.htm
http://www.preservationsound.com/wp-content/uploads/

http://www.4tubes.com/SCHEMATICS/BY-BRAND/Antique-Sound-Lab/antique/Power_AMP_HG.htm

http://www2u.biglobe.ne.jp/~hu_amp/

 

[hpeter]

Direct Heating

71A SE AMP

not sure if this was posted here

 

[audiowize]

Thanks to Soundhappy for posting these links and stuff. My eye was caught with this PP tube headphone amp: MJ1801_(04)5670WA-pp-headphone-amp_YanagisawaM.pdf - Google Drive

What do you tube experts say - would it be worth the effort to build? Any design flaws?

I'm afraid that the Noguchi output transformer PMF-8P-10K is not available in europe. What would be a suitable replacement?

The current source used has, in my experience at least, very uneven impedance depending on frequency. One can bridge rectify the 6V winding, ground the positive side of that supply, then you end up with a negative rail which allows for a higher performance CCS.

Power is so low that the choice of output transformer is quite open.

 

[Soundhappy]

February update part 2

 

[Soundhappy]

News about older articles now available.
That is possible only because work of Distant Past Radio Boy
Thanks for all DIY spirit of knowledge share with generosity 🙂

 

[Soundhappy]

Update today 12 | march | 2018

 

[kstlfido]

News about older articles now available.
That is possible only because work of Distant Past Radio Boy
Thanks for all DIY spirit of knowledge share with generosity 🙂

I see a 15E amplifier! Always wanted to try this little tube. Any link to index or info on "Distant Past Radio Boy"? Google provided me with nothing.

-Kent

 

[jazbo8]

See 送信管　ＰＴ１５　シングル　ステレオアンプ

 

[Soundhappy]

Translated blog version , 15E amplifier are on the page [6]

Google Traduction

Have fun

 

[Soundhappy]

Any link to index or info on "Distant Past Radio Boy"?
-Kent

@ Kent

Yes vacuum tube DIY hobby amateur :
See " About Us " link on this page :

Google Traduction

Best regards 🙂

 

[kylej1050]

One can bridge rectify the 6V winding, ground the positive side of that supply, then you end up with a negative rail which allows for a higher performance CCS.

Could you elaborate on this? What CCS would you use that requires a negative rail?

 

[dowdylama]

schematics

Many thanks for your continued postings!!!

How does one access schematics?

Translated blog version , 15E amplifier are on the page [6]

Google Traduction

 

[jazbo8]

There is no schematic available from tamasan 22’s blog.