Gold mine of DI¥ audio tubes schematics from Japan

[Soundhappy]

What's that 6GB3A CSPP thing in #138? Which finals does it feature? Any schematics available?
Best regards!

@ Kay Pirinha

You can find article about this amplifier in the big archives :
r-tec1210_(04)6GB3A-CSPP_amp_ShiodaH.pdf - Google Drive

Have a nice day

 

[jazbo8]

Here it is:

 

[Kay Pirinha]

Thanks! Unfortunately I don't have my Japanese dictionary handy at the moment .


What's that 6GB3-A tube? Cannot source any datasheet, only of 6CB5-A, which also is a sweep pentode, but with all glas envelope and Magnoval socket.


Best regards!

 

[davorin]

Here is data for 6G-B3A (6GB3A) tube:

 

[Kay Pirinha]

Thank you, Davorin!


I see obvious similarities to the more common 6CM5/EL36 sweep tube, of whom I've been thinking as I saw the pictures.


Best regards!

 

[Soundhappy]

WE91 by JLB on Vimeo

New DIY articles update 2017-18

Thanks to Old Radio Boy!

 

[Soundhappy]

August 2018 update part 2 is available on line

 

[Soundhappy]

 

[Soundhappy]

DiY articles update 2011-12

 

[Soundhappy]

DIY articles update 2000 Enjoy

 

[Soundhappy]

Update 28 august DIY articles link -2000

 

[analog_sa]

Soundhappy,

Many thanks for your daily updates. Some of the circuits are truly innovative and interesting. Really great stuff

 

[hpeter]

sadly the 3cx300a1 is unobtanium

 

[Soundhappy]

or in stock but co$t is high
3CX3000A1 NOS, Tube, transmiiting - 3CX - EIMAC - Transmitting Tubes - Tubes - Transmitting, Audio, Misc.

we can find modern equivalents at good price as well

Eimac Equivalent Tube-Eimac Equivalent Tube

 

[Soundhappy]

Some of the circuits are truly innovative and interesting.

Thanks Analog_sa nice kind words!
All glory is for Distant Past Old Radio Boy-San work efforts to inspire hobby amateurs,
preserve and distribute DIY educative knowledge writings about audio tubes
Not always easy to read but with lot's of curiosity and research we can build many amplifiers only from all archived schematics.
If photos show Tango or Tamura brand transformers and chokes then check specyfications , parameters catalogues.
One example this is Tamura

 

[Soundhappy]

Producer links
TAMURA CORPORATION Select from Product List

TAMURA CORPORATION Download

https://www.tamura-ss.co.jp/file.jsp?id=18665

 

[Soundhappy]

Update 29 August -2000

 

[hpeter]

or in stock but co$t is high
3CX3000A1 NOS, Tube, transmiiting - 3CX - EIMAC - Transmitting Tubes - Tubes - Transmitting, Audio, Misc.

we can find modern equivalents at good price as well

Eimac Equivalent Tube-Eimac Equivalent Tube

you added one extra zero
heater with 7,5v 50a is a no-go at home use...

 

[Soundhappy]

heater with 7,5v 50a is a no-go at home use...

Two push-pull monoblock's with four Eimac emiter tubes was build by Japanese Diyer Everything is possible

 

[Soundhappy]

30 August update -2000
Interesting OTL amplifier
MJ^9911_(09)26LW6-SEPP-OTL-power-amp_KadoT.pdf - Google Drive