Earlier I had posted these questions to the wrong forum. My apologies, I am new at this.
Hi, first of all, credit to all the work that people have done on the A60 power amp "clones". I do have several questions:
1. Does anyone know the difference between the A60-V1.0 and the A60-V1.1 boards?
Note: A60 using 3x NPN and 3x PNP output stage version, not the 8x NPN and 8X PNP high power version.
I have looked high and low for this info and have had no luck to date.
2. Has anyone experimented with a revised VAS stage?
The A60 clone boards use an oddly revised cascode with bootstrap VAS stage vs. the Accuphase simple but effective cascode Darlington version.
3. Is there any good data on the THD vs. Po and frequency behavior of the A60 or the A60+ power amps?
4. Is there any concise discussion of mods or improvements to these boards?
5. Has anyone figured out the matrix of V60, V60+, V60++, and the various revs of these boards, V1.0, V1.1, etc?
It would really be nice if there was a central compilation of data and schematics for these assorted variants.
Thank you, and regards.
Hi, first of all, credit to all the work that people have done on the A60 power amp "clones". I do have several questions:
1. Does anyone know the difference between the A60-V1.0 and the A60-V1.1 boards?
Note: A60 using 3x NPN and 3x PNP output stage version, not the 8x NPN and 8X PNP high power version.
I have looked high and low for this info and have had no luck to date.
2. Has anyone experimented with a revised VAS stage?
The A60 clone boards use an oddly revised cascode with bootstrap VAS stage vs. the Accuphase simple but effective cascode Darlington version.
3. Is there any good data on the THD vs. Po and frequency behavior of the A60 or the A60+ power amps?
4. Is there any concise discussion of mods or improvements to these boards?
5. Has anyone figured out the matrix of V60, V60+, V60++, and the various revs of these boards, V1.0, V1.1, etc?
It would really be nice if there was a central compilation of data and schematics for these assorted variants.
Thank you, and regards.