ah...for bridging two stereo amps, I guess
but starting from scratch, I thought 'X-balanced' would be better
well, maybe its better to go slow on the balanced subject...its still early days for this thread
and it might go on for a long timeah...for bridging two stereo amps, I guess
but starting from scratch, I thought 'X-balanced' would be better
well, maybe its better to go slow on the balanced subject...its still early days for this thread
I'll pause for the time being and wait to explain its operation.
Two threads already explain [by analogy] the operation of Conjoined Twin AB100. They are "Conjoined Twin DiyF6s" and "Bridge a pair of F5s" in the Pass Labs Forum.
Best regards.
I should think they would do the job, and fewer of them.. Of course you
don't at all have to use darlingtons. It's trivial to put together a driver stage.
Trivial for YOU maybe LOL!
Not so much for us Padawans!
I will have to presume that the diode string across the bases of TIP 142 147 will shunt excessive drive to output and that will create a crude method of limiting if and when needed
I am actually not familiar how protection like that will work sound wise ...None of the amplifiers i am listening to had this schema of protection ...Also don't know how effective this is
Then the question for me is :why bother? since Darlingtons on the output will do there "own" thing after the protection depending on the thermals cooling load and so on and on .
Tinitus i think exercise is always nice and sharpens brains but i think one may put his energy on a pcb and not a schematic .
Nice idea for a weekend project could be a pcb that has the arrangement of transistors L style bracket made like NPNPDVBEDNPNP
Where
N stands for NPN
P stands for PNP
D for driver ( there can be a question if driver needs common heat sink with outs)
and VBE will be Vbe
could be nice project but not for me ...unless one has a better darlington to offer than 142 147 ( any with audio specs will do )
I presume that arrangement like that will offer excellent current sharing and equalize thermals all the way through . Point is no matter what i say the next step is to construct and listen cause i may hate darlingtons while NP operates them in an ""other" way and after all may worth listening .
Kind regards
Sakis
I am actually not familiar how protection like that will work sound wise ...None of the amplifiers i am listening to had this schema of protection ...Also don't know how effective this is
Then the question for me is :why bother? since Darlingtons on the output will do there "own" thing after the protection depending on the thermals cooling load and so on and on .
Tinitus i think exercise is always nice and sharpens brains but i think one may put his energy on a pcb and not a schematic .
Nice idea for a weekend project could be a pcb that has the arrangement of transistors L style bracket made like NPNPDVBEDNPNP
Where
N stands for NPN
P stands for PNP
D for driver ( there can be a question if driver needs common heat sink with outs)
and VBE will be Vbe
could be nice project but not for me ...unless one has a better darlington to offer than 142 147 ( any with audio specs will do )
I presume that arrangement like that will offer excellent current sharing and equalize thermals all the way through . Point is no matter what i say the next step is to construct and listen cause i may hate darlingtons while NP operates them in an ""other" way and after all may worth listening .
Kind regards
Sakis
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A few quick answers.
The original design (this one) was intended for dummies with maximum
reliability and minimum adjustment and also minimum opportunity for
noises and pops. ....
I guess that answers it .... maximum reliabity sounds good for my bass guitar... and intended for dummies, spot on too
I expect to hardwire on proto board
regarding the Darlingtons
with their high current gain, I suppose they are easy to drive, and might have been chosen for that reason ?
http://www.onsemi.com/pub_link/Collateral/TIP140-D.PDF
I guess there is a first time for everything, also on Pass forum