Gold mine of DI¥ audio tubes schematics from Japan

[jazbo8]

How long did it take you to gather all the parts?

 

[tamra]

I have already spent 6 month.
I live near Akihabara so I can gather parts easily but I buy slowly for money.
Last month I orderd alminium cutting to small company and made walnut flame.
I also spending long time to reading,understanding schematics but really slow...

 

[jazbo8]

Great, please keep us posted on your progress, it’s looking pretty good already.

 

[pl802]

Very nice tamra........and you live near Akihabara,you jammy sausage!!!Keep the pics coming.

 

[Lingwendil]

This thread makes me want to listen to this gem-


Mariya Takeuchi- Plastic Love

 

[tamra]

I am happy to share my project.
I will make another thread for my progress but I join to post some Japanese schematics here. 　Please forgive my luck of knowridge/understanding for tube amps and english.
This one is another version of 300Bse amp using EC86/6CM4 instead of EC88/6DL4. 2dB NFB,Designed enough simple for newbie.
Last picture is improvement plan for cross talk.

 

[Stuey]

Very nice tamra........and you live near Akihabara,you jammy sausage!!!Keep the pics coming.

 

[kstlfido]

I am happy to share my project.
I will make another thread for my progress but I join to post some Japanese schematics here. 　Please forgive my luck of knowridge/understanding for tube amps and english.
This one is another version of 300Bse amp using EC86/6CM4 instead of EC88/6DL4. 2dB NFB,Designed enough simple for newbie.
Last picture is improvement plan for cross talk.

Both are nice schematic. Clean build! You are lucky to live near Akihabara! One day I will visit there and Restaurant Concorde.

6DW4 great rectifier and still plentiful here in USA. 2µf coupling capacitor??? A bit large; to play whale notes?

Keep up the good work!

Kent

 

[tamra]

This thread makes me want to listen to this gem-


Mariya Takeuchi- Plastic Love

For me, Mariya takeuchi remains me Tuesday suspense theater on TV.
After confession about criminal incident with tears on seaside cliff, Mariya's song bring to finish.
YouTube

 

[Soundhappy]

DIY articles update november 2017-18

 

[overtheairbroadcast]

Thank you Soundhappy! Makes for interesting reading while at work.

 

[Soundhappy]

Part 2 DIY articles update November 2017-18

 

[Kay Pirinha]

You know that the amplifier with 6R-A2's is a dangerous one?
Best regards!

 

[JoeAlders]

 

[Kay Pirinha]

The finals' heater chain isn't isolated from mains and a tube's heater-cathode isolation mustn't be regarded as safe enough.
Best regards!

 

[JoeAlders]

Ah, that it! I don't have a tube spec of this type but I guess that the isolation between cathode and heater can be an issue.
Thanks Kay.

 

[Lingwendil]

If built, it needs an isolation between wall and filaments. A heater winding for them should be used.

 

[Soundhappy]

Take 100 V from primary is strange no doubt....
other voltages are low ~50 V and 21 V if compare with many high B+in amplifiers , this OTL is on the less dangerous side.
Thanks Diyers and please tube amateurs remember :
Always safety first

 

[CaliforniaBob]

100v is Japanese standard voltage, as is no ground. the nation is
divided into 50/60hz.

 

[merlin el mago]

100v is Japanese standard voltage, as is no ground. the nation is
divided into 50/60hz.

It's curious.