Gold mine of DI¥ audio tubes schematics from Japan

[Soundhappy]

2019-2020

MJ1907_(05)Nutube-hybrid-D-A-converter_KanedaA.pdf - Google Drive

 

[analog_sa]

Thank you!

An interesting balanced variation of the pentode-loaded riaa.

 

[Soundhappy]

Enjoy DIY 2019-2020

 

[Soundhappy]

Tube schematics new update Have a nice day

 

[Soundhappy]

DIY articles HOME

MJ0310_(03)special-feature_300B-single-amp.pdf - Google Drive

 

[Soundhappy]

articles update Have a great Sunday

 

[Soundhappy]

Update 2009-10

 

[Soundhappy]

Have fun 2019-2020

 

[Kay Pirinha]

At first glance I was sure that these tubes are veteran TELEFUNKEN RV258's form the 1920ies. I'm the proud owner of a (one) RV258 III. But on a closer look they're different. What tubes are they?
Best regards!

 

[Soundhappy]

@ Kay Pirinha

Made in the USA MJ0210_(02)vacuum-tube-museum(55).pdf - Google Drive

 

[Soundhappy]

DIY articles update 2001-2002

 

[analog_sa]

Thanks! Really liked the ECC99 parallel-bridge concept.

 

[Soundhappy]

Enjoy 2003-04

 

[Soundhappy]

Update 2003-04

 

[Sorento]

The last picture in post #341 seems to show 16x russian 6s19p (6С19П) tubes but I can't find any description or schematic for it.
No OPT as well, so maybe OTL ?
And what is in those cages ? maybe SMPS ?
A schematic would be nice to have ... Thank you.

 

[analog_sa]

Smps for the heaters.

 

[Soundhappy]

A schematic would be nice to have ...

OTL Greetings

 

[Sorento]

OTL Greetings

Ah, now it makes sense ...
And also why there are smps AND iron present, chokes !
Thanks a lot ...

 

[Soundhappy]

DIY articles update 2019-2020

 

[Soundhappy]

Ah, now it makes sense ...
And also why there are smps AND iron present, chokes !
Thanks a lot ...

Have a good time