Thanks for kind words Diyers Have a good time
Public domain old book's about vacuum tubes, amplification etc.
https://ia801605.us.archive.org/14/..._Design_G.E._Valve-Electronics_Dept._1957.pdf
Vacuum Tube Amplifiers : George E. Valley Jr. & Henry Wallman : Free Download, Borrow, and Streaming : Internet Archive
Thermionic Valve Circuits : Emrys Williams : Free Download, Borrow, and Streaming : Internet Archive
Public domain old book's about vacuum tubes, amplification etc.
https://ia801605.us.archive.org/14/..._Design_G.E._Valve-Electronics_Dept._1957.pdf
Vacuum Tube Amplifiers : George E. Valley Jr. & Henry Wallman : Free Download, Borrow, and Streaming : Internet Archive
Thermionic Valve Circuits : Emrys Williams : Free Download, Borrow, and Streaming : Internet Archive
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Yes, ill-conceived indeed!866A is a mercury vapour rectifier that itselves needs the HT voltage to be delayed until it's cathode has warmed and enough mecury has vapourized.
Sorry, I think that this feature is ill-concieved.
Any old damper diode will happily serve that function.
30 seconds is enough time for warm the DA100 oder 845
If is a big problem, you can avoid it without sonic problems...
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!
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!
I believe someone already once posted something along the lines of an 845 driving a 6V6
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.
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I think that this feature is ill-concieved.
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.
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.
Update schematics DIY HOME
Mullard Equivalents List 1965-66 : Mullard Ltd. : Free Download, Borrow, and Streaming : Internet Archive
Vacuum Tube Manual: Mullard Tubes 196x : Free Download, Borrow, and Streaming : Internet Archive
Mullard Equivalents List 1965-66 : Mullard Ltd. : Free Download, Borrow, and Streaming : Internet Archive
Vacuum Tube Manual: Mullard Tubes 196x : Free Download, Borrow, and Streaming : Internet Archive
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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.
Do you have a link to that topic? I have seen some mentions of it but could never find it
Do you have a link to that topic? I have seen some mentions of it but could never find it
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.
Thanks a lot for these Mullard documents !
Yes interesting library Vacuum Tube Manuals : Free Texts : Free Download, Borrow and Streaming : Internet Archive
Have a good time
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Oh God! this page is incredible! Did you watch the Vacuum Tube Manual: Kenyon Amateur 1937 : Free Download, Borrow, and Streaming : Internet Archive ?
this is a goldmine men
this is a goldmine men
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.
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 !
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