• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Gold mine of DI¥ audio tubes schematics from Japan

Jump to Latest
Soundhappy

Soundhappy

Member
Joined 2012

Attachments

  • EDC282B6-EFD1-4CB0-91AE-07D4AE985B09.JPG
    EDC282B6-EFD1-4CB0-91AE-07D4AE985B09.JPG
    120.4 KB · Views: 380
  • 10A438FB-BBF6-4714-AF04-903DDEDAF6F3.JPG
    10A438FB-BBF6-4714-AF04-903DDEDAF6F3.JPG
    98.8 KB · Views: 370
Kay Pirinha

Kay Pirinha

Member
Joined 2011
dady said:
30 seconds is enough time for warm the DA100 oder 845
If is a big problem, you can avoid it without sonic problems...:D:D
Click to expand...


Yes, but as I said before, these 30 seconds, if really needed at all, would have to be provided by another gut, not by that 866A, which simply is superfluous.
Sorry, Soundhappy, no offence intended, but many of the schematics in this thread appear to carry the badge »Just to be different!«

Best regards!
 
  • Like
Reactions: 1 user
G

gideon1990

Member
Joined 2009
Kay Pirinha said:
Yes, but as I said before, these 30 seconds, if really needed at all, would have to be provided by another gut, not by that 866A, which simply is superfluous.
Sorry, Soundhappy, no offence intended, but many of the schematics in this thread appear to carry the badge »Just to be different!«

Best regards!
Click to expand...

I believe someone already once posted something along the lines of an 845 driving a 6V6
 
dady

dady

Member
Joined 2002
The circuits are as they are, nobody generated them beyond that special way that the Japanese have to design valve circuits. There are people who have put damper diodes valves in transistorized circuits, and if we start doing efficiency or perfection analysis we have to start admitting things as they are. Whoever does not like that it does not, Sound Happy has this thread and keeps it updated with original circuits. To the person who does not like it to do as with the nose, you do not like, but it is the nose that your parents gave you, but you like do not look at it. I have a feeling that we will start discussing the sex of angels and that soon this thread will be transferred to the Loungue section.
 
Last edited:
analog_sa

analog_sa

Member
Joined 2002
Kay Pirinha said:
I think that this feature is ill-concieved.
Click to expand...

Mysterious or inexplicable are more appropriate then ill conceived. We can agree the 866 has nothing to do with delaying B+, only this is obvious and invites no further discussion.

Similarly inexplicable is the use of parallel to SS diodes tube rectifiers in many of Kondo's more recent amps.

I have little doubt the effect is audible and worthwhile and perhaps the Japanese builder has a working hypothesis why this is so.
 
dady

dady

Member
Joined 2002
XCTO, many things have no explanation, I remember that Sakuma made the copper chassis stand for a time in his store so that they absorbed the vibrations of the place, after a time of leaving the chassis bare he began to build the amplifier, he was the one who He put 845 behind another 845, in the end the myth is mixed with science and one as an unwary person realized that his designs sounded better than anything. Martin Colloms said in one of his maxims that louder amps sound better. There is a huge dose of subjectivity in everything. And especially in this hobby. Instead of putting a 866A on and feeding the filament to delay the + B, having the anode dangerously exposed on top of the valve, with voltage loss is easier and safer, setting a delay with an NE555 and a relay. It sure sounds worse, but who would notice? I have seen a CD player built in this forum that uses two tube Damper diodes and a very low voltage circuit in the power supply. Who can tell another that what he is doing is wrong? Or is it irrational. As long as he doesn't explain it, it's going to be a mystery.
 
Soundhappy

Soundhappy

Member
Joined 2012

Attachments

  • A5C6562A-C515-47D3-AEC8-3DA3B3A214CB.JPG
    A5C6562A-C515-47D3-AEC8-3DA3B3A214CB.JPG
    550.4 KB · Views: 461
  • 6EE0DAB6-DB92-4D5A-9086-56538EE7A185.JPG
    6EE0DAB6-DB92-4D5A-9086-56538EE7A185.JPG
    325.3 KB · Views: 479
  • EA3BB184-0BAB-44F0-9160-09F8875D3D4D.JPG
    EA3BB184-0BAB-44F0-9160-09F8875D3D4D.JPG
    331.3 KB · Views: 475
  • E7B7764B-F111-4172-9B25-77C1134B32C9.JPG
    E7B7764B-F111-4172-9B25-77C1134B32C9.JPG
    368.1 KB · Views: 459
  • 2246A47E-74D2-4125-B95F-6CC0685C64CC.JPG
    2246A47E-74D2-4125-B95F-6CC0685C64CC.JPG
    377.9 KB · Views: 467
  • 8E2D2DD8-B740-4162-8EB4-0B369993DD69.JPG
    8E2D2DD8-B740-4162-8EB4-0B369993DD69.JPG
    323 KB · Views: 199
  • 71A65725-B622-49CD-A375-F5654CCD11C6.JPG
    71A65725-B622-49CD-A375-F5654CCD11C6.JPG
    404.9 KB · Views: 236
  • 182CD21E-E080-4C91-A978-D17333D5CB29.JPG
    182CD21E-E080-4C91-A978-D17333D5CB29.JPG
    538.6 KB · Views: 224
  • F00F3214-27F4-4B2D-B1F8-F5B3BA1D4D1B.JPG
    F00F3214-27F4-4B2D-B1F8-F5B3BA1D4D1B.JPG
    35.4 KB · Views: 137
  • D1DB2101-4F89-48C3-9EEA-7DF39B75FBF4.JPG
    D1DB2101-4F89-48C3-9EEA-7DF39B75FBF4.JPG
    43.1 KB · Views: 118
G

gideon1990

Member
Joined 2009
dady said:
XCTO, many things have no explanation, I remember that Sakuma made the copper chassis stand for a time in his store so that they absorbed the vibrations of the place, after a time of leaving the chassis bare he began to build the amplifier, he was the one who He put 845 behind another 845, in the end the myth is mixed with science and one as an unwary person realized that his designs sounded better than anything. Martin Colloms said in one of his maxims that louder amps sound better. There is a huge dose of subjectivity in everything. And especially in this hobby. Instead of putting a 866A on and feeding the filament to delay the + B, having the anode dangerously exposed on top of the valve, with voltage loss is easier and safer, setting a delay with an NE555 and a relay. It sure sounds worse, but who would notice? I have seen a CD player built in this forum that uses two tube Damper diodes and a very low voltage circuit in the power supply. Who can tell another that what he is doing is wrong? Or is it irrational. As long as he doesn't explain it, it's going to be a mystery.
Click to expand...

Do you have a link to that topic? I have seen some mentions of it but could never find it
 
G

gideon1990

Member
Joined 2009
dady said:
Sound Practices for Sakuma
Audio Amateur for Martin Colloms

I read they in Argentina, I have there my collection of magazines I miss so much. But this was long time ago.
Click to expand...

Oh sorry I should have been more clear, I was talking about this damper diode in a cd player story. It sounds like a fun read :)




P.S a big thanks to the people who are posting cool things in here !
 
You must log in or register to reply here.
Top Bottom