Looking at the schematic I see it is not the same as Crescendo,
but other versions sold by ALBS are.
but other versions sold by ALBS are.
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No you didn't - we're just discussing servos before that.
Are those schematics for an ALBS amp? Any idea what the "Modul 1" is for? It's not in the parts list.
Thanks a lot!
Thanks as_audio, it is the one. Now the heat sink make sense.
The module is part of the feedback circuitry, connected to inputs, grounds, outputs, what not.
There is a bias pot and a maximum output level pot (through D13) activating the relay(-s).
The module is part of the feedback circuitry, connected to inputs, grounds, outputs, what not.
There is a bias pot and a maximum output level pot (through D13) activating the relay(-s).
@CyberIndy
No idea what the "HF"-pin is for. The only thing I recall is a cryptic statement, that it can be tied to ground for special applications. How many pins does your "Modul 1" have ?
No idea what the "HF"-pin is for. The only thing I recall is a cryptic statement, that it can be tied to ground for special applications. How many pins does your "Modul 1" have ?
The schematics as_audio contributed (thanks 🙂) are for an "ALBS DAC MOS 100" - or at least I found them attached to an thread about that amp.
The DAC MOS 100 looks very similar, but not identical to mine. The best picture I could find is:
Maybe mine is an older version? Or maybe an inofficial clone of some sort - it seems like the ALBS amps all proudly featured the albs logo on the PCBs which mine is missing. Unfortunately there doesn't seem to be much information available online for these older albs amps.
The DAC MOS 100 looks very similar, but not identical to mine. The best picture I could find is:
Maybe mine is an older version? Or maybe an inofficial clone of some sort - it seems like the ALBS amps all proudly featured the albs logo on the PCBs which mine is missing. Unfortunately there doesn't seem to be much information available online for these older albs amps.
@MarsBravo: The problem with the blue modules was, that the embedding resin was quite aggressive and corroded the copper traces, so I had to build 1:1 replacements, which work fine. Unfortunately my spars documentation got lost over the years. The crescendo schematic mentioned by as-audio should come close if memory serves me well.
Ah- that would explain the big size of those pins. Not sure though what "HF" should stand for then?
Over at ALBS DAC- MOS, Elektronik - HIFI-FORUM the users were also puzzled by those HF-pins. One theory was that you could/should connect a capacitor in order to filter HF interference.