VSSA is Lazy Cat's baby, the PeeCeeBee is Shaan's simpler "poor man's" VSSA. IIRC, there was some initial co-operation but the PeeCeeBee has effectively become Shaan's.
I don't blame Shaan for defending the relative simplicity of the PeeCeeBee, and the integrity of the tread. He has allowed some of us to explore it in our own way, so long as the basic 'recipe' remains the same. There are other VSSA related threads here where more progressive ideas would be more welcomed.
Cudos to Shaan for keeping the thread on track and not allowing the derailment of a good thread and nice little design.
I don't blame Shaan for defending the relative simplicity of the PeeCeeBee, and the integrity of the tread. He has allowed some of us to explore it in our own way, so long as the basic 'recipe' remains the same. There are other VSSA related threads here where more progressive ideas would be more welcomed.
Cudos to Shaan for keeping the thread on track and not allowing the derailment of a good thread and nice little design.
Thanks Jason, I am grateful for your continuous support.
Of course VSSA is LC's. However, Gabor is the first guy to introduce the technique to this forum, AFAIK. So, I consider both of them equally important and am thankful to both.
This is a build thread, based on a fixed VSSA design. I chose to keep it that way because its work principle is just as easy to understand as it is to build, on a perf board or pcb.
Since I first listened to the amp, the craze of spreading the idea has been the driving force for me. I see PeeCeeBee as a philosophy that helps the new builder taste the topology at its most basic form and also let free his imagination in case he wonders in how many ways he can scatter the components on the board and still make it play the same song.
The many layout designs that you guys released has helped a lot of people, and modified/fresh designs are added regularly. Your designs are inspiring others to draw their own, and they try hard to make it work. If it works it may be shared to attract and inspire even more.
I believe this is the true meaning of D.I.Y.
Of course VSSA is LC's. However, Gabor is the first guy to introduce the technique to this forum, AFAIK. So, I consider both of them equally important and am thankful to both.
This is a build thread, based on a fixed VSSA design. I chose to keep it that way because its work principle is just as easy to understand as it is to build, on a perf board or pcb.
Since I first listened to the amp, the craze of spreading the idea has been the driving force for me. I see PeeCeeBee as a philosophy that helps the new builder taste the topology at its most basic form and also let free his imagination in case he wonders in how many ways he can scatter the components on the board and still make it play the same song.
The many layout designs that you guys released has helped a lot of people, and modified/fresh designs are added regularly. Your designs are inspiring others to draw their own, and they try hard to make it work. If it works it may be shared to attract and inspire even more.
I believe this is the true meaning of D.I.Y.
Hi X86. Don't sweat it. All's well here.
Let us get back to building more PeeCeeBee!
Happy listening.
Let us get back to building more PeeCeeBee!
Happy listening.
Peeceebee
My Peeceebee first test.
+/-35v
Dummy load=6R
VAS current=30mA(0.3V On 10R)
Compensation capacitors=33pf
My Peeceebee first test.
+/-35v
Dummy load=6R
VAS current=30mA(0.3V On 10R)
Compensation capacitors=33pf
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Hi thimios.
Seems you are using -16 suffix BD pair. Are you?
Just increase the 15k resistors to 22k and you should be near 15mA.
Keep us updated.
Seems you are using -16 suffix BD pair. Are you?
Just increase the 15k resistors to 22k and you should be near 15mA.
Keep us updated.
Yes ,compensation capacitors are populated under board, directly connected at transistors pins.
Oh sorry,i didn't try this.I will try this tomorrow.
VAS current=14mA(0.142V on 10R) With 16K VAS emitter resistor.(putting here 22K the VAS current is 2mA only!)
Offset =6mv(1M//16K on the positive rail)
Raise time=640ns!
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NICE. 
Hope you get a wonderful listening expdrience.
Very good offset and VAS current.
Please play some music with PeeCeeBee with the comp caps connected. If you like the sound then keep the caps in the circuit.
Well, of course it would be interesting how your board behaves without compensation. Please don't mind my curiosity. 🙂
Hope you get a wonderful listening expdrience.
Very good offset and VAS current.
Please play some music with PeeCeeBee with the comp caps connected. If you like the sound then keep the caps in the circuit.
Well, of course it would be interesting how your board behaves without compensation. Please don't mind my curiosity. 🙂
I will try without compensation caps ...my curiosity😉NICE.
Hope you get a wonderful listening expdrience.
Very good offset and VAS current.
Please play some music with PeeCeeBee with the comp caps connected. If you like the sound then keep the caps in the circuit.
Well, of course it would be interesting how your board behaves without compensation. Please don't mind my curiosity. 🙂
Is any of these Peeceebe working well (no oscillation)without compensation?
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Speaker is not resistive load, stability with reactive load is important for sound fidelity.
Regards
Stability in capacitive reactive load.
However, I doubt it's practical benefit as normal speakers are complex Inductive reactive load, not capacitive. But if apex is planning to adopt the PeeCeeBee for his ESLs then may be it is relevant. But making others run a test that matters little or none to them is, well, a bit hard for me to understand, especially if the person asking is a reputed 'designer'.
However, I doubt it's practical benefit as normal speakers are complex Inductive reactive load, not capacitive. But if apex is planning to adopt the PeeCeeBee for his ESLs then may be it is relevant. But making others run a test that matters little or none to them is, well, a bit hard for me to understand, especially if the person asking is a reputed 'designer'.