Output stage for BBA3
I'm hammering up a BBA3 and I just realized that I do not have an output stage to mate it with
Really just an excuse for finding additional projects
Any suggestion anyone? I don't need much power and I don't think I have heat sinks for 300W dissipation.
Cheers,
Nic
I'm hammering up a BBA3 and I just realized that I do not have an output stage to mate it with
Really just an excuse for finding additional projects
Any suggestion anyone? I don't need much power and I don't think I have heat sinks for 300W dissipation.
Cheers,
Nic
I'm hammering up a BBA3 and I just realized that I do not have an output stage to mate it with
Really just an excuse for finding additional projects
Any suggestion anyone? I don't need much power and I don't think I have heat sinks for 300W dissipation.
Cheers,
Nic
I think the 300W refers to the full six pairs of fets i.e., two output boards per channel. More manageable if you just use one output board per channel.
Chris
across R13 seems good to me...
@tea-bag D could be after the cap.....
Thanks. Yes it's got to be before the cap.
Chris
Generg,
Have you decided on a position of P3 which you prefer to listen to? If so why do you prefer it?
Chris
I think the 300W refers to the full six pairs of fets i.e., two output boards per channel. More manageable if you just use one output board per channel.
Chris
A single mosfet pair would mean two pairs or 4 fets per channel for a balanced setup. If you ran two mosfet pairs, that would be 8 per channel and you would need even more dissipation capability than standard BA output.
A single mosfet pair would mean two pairs or 4 fets per channel for a balanced setup. If you ran two mosfet pairs, that would be 8 per channel and you would need even more dissipation capability than standard BA output.
So how many mosfet pairs are on one output board?
Standard BA-3 has 3 pairs or six fets per channel. If you look at the schematic for BA-3b, you now have to double that in order to have a complete amp if using standard output stage. Think of BA-3B as a pre-amp and the needed BA output as an F4 running as a mono-block instead of stereo output. Go back and read listing of BA-3B info and look at the output power compared to standard BA amp. That did not come from just different FE. It is a function of the FE and the doubling of the output transistors.
hi Backbones,
the problem is - the Mac software is on a desktop PC (hackintosh) and I put the amps besides it,
when I have in November the software on my laptop (windows software) i can measure and hear in my living room with the speakers, so I have to wait if I prefer more or less k2......
the problem is - the Mac software is on a desktop PC (hackintosh) and I put the amps besides it,
when I have in November the software on my laptop (windows software) i can measure and hear in my living room with the speakers, so I have to wait if I prefer more or less k2......
I might beat you to it by just twiddling P3 one way and then the other--adjusting everything else along the way--and having a listen.
Now I've soldered everything in place can I measure the R value on P3 for different positions (thinks to himself); I'll go down to the garage and see.
Chris
Now I've soldered everything in place can I measure the R value on P3 for different positions (thinks to himself); I'll go down to the garage and see.
Chris
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