FYI he said it on post #2678.Super nice build Juntuin!
Maybe you could use both left and right sides with speaker grill clothe, covering complete both sides or just one. It would have an audio look? Make a black painted wooden frame with rounded sides to lift everything 10mm?
Just a thought..
Do
Kind of
FYI he said it on post #2678.
Hi Tonza, I wasn't thinkin using that for the whole side but why not, it might work!
..and black edition. I don't know, maybe that tinted acrylic would be better than any of these.
Why do you want to hide the gorgeous details? Show it off.
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I agree, showing it off is nice.
Is that an ACA or a MoFo? How does all that heat from the two MOSFETs bolted to the center bar get dissipated?
If I am not wrong that is a gainclone amp by Peter Daniel:
6moons audio reviews: Audiosector Patek
Juntuin,
Very nice work with the build! Congratulations on the successful execution of some bold design ideas.
Thanks Z, sides will get trashed tough and something else is coming as replacement but even then, this is not the most conservative build..but neither is the B.B., it's rather something old combined to something new.
This is interesting. Matched PNP in SMT package.
https://www.mouser.com/datasheet/2/308/NST65010MW6-D-775558.pdf
Although specs say current gain matching to within 10% whereas we hand match Hfe to typically 1%.
KSA992 also available in SOT23 package - it’s called FJV992MTF.
https://www.fairchildsemi.com/datasheets/FJ/FJV992.pdf
The KSC1845 is available as SOT23 and called FJV1845PMTF
https://www.fairchildsemi.com/datasheets/FJ/FJV1845.pdf
The front end of the Alpha and the Aleph CCS could theoretically be shrunken down to the size of large postage stamp if all SMT parts were used.
https://www.mouser.com/datasheet/2/308/NST65010MW6-D-775558.pdf
Although specs say current gain matching to within 10% whereas we hand match Hfe to typically 1%.
KSA992 also available in SOT23 package - it’s called FJV992MTF.
https://www.fairchildsemi.com/datasheets/FJ/FJV992.pdf
The KSC1845 is available as SOT23 and called FJV1845PMTF
https://www.fairchildsemi.com/datasheets/FJ/FJV1845.pdf
The front end of the Alpha and the Aleph CCS could theoretically be shrunken down to the size of large postage stamp if all SMT parts were used.
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I am curious what rail voltages builders of the Alpha 20 and Alpha BB are actually running at? There is a large amount of voltage sag with linear trafos and it seems to me, no matter how I try, I end up always a volt or two below recommended rail voltage. Also, if you are above, is the heat output manageable?
I recently bought a pair of 22VAC 300VA Anteks, hoping to get a solid 27vdc under load of 1.6amps. After the CRCRCRC, I am getting 25.6v. This is for a high output variant of the Alpha 20 that I am testing - just seeing if pushing higher voltage and increased cooling via CPU coolers and fans can work to boost power output.
I recently bought a pair of 22VAC 300VA Anteks, hoping to get a solid 27vdc under load of 1.6amps. After the CRCRCRC, I am getting 25.6v. This is for a high output variant of the Alpha 20 that I am testing - just seeing if pushing higher voltage and increased cooling via CPU coolers and fans can work to boost power output.
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With the 22V transformer, you get 26.4V plus U use CRCRCRC power supply. With the 3pc R you burn up some power also. I hope you not using any high-value resistors there to burn up more power. Your 25.6V is absolutely normal with your setup.
When you buy a transformer to regular Class A bias calculation(not talking about Alep X where the total bias is over 7A per channel) 22ACV x 1.2 under load =26.4V DC.
When you buy a transformer to regular Class A bias calculation(not talking about Alep X where the total bias is over 7A per channel) 22ACV x 1.2 under load =26.4V DC.
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