Pictures of your diy Pass amplifier

[nar]

Please find below pics for my recently upgraded A_4 to A_J.

Those are mono blocs versions.
New mainboards are pro. factory custom made.
Other than mainboard, only change needed was the xformer, 18V/450VA per bloc.
Fuse 240V is 500 mA and holds with 2 CL60 in series.
Current is 2,3 amps as per schematic values on +/- 23,4V average. Offset 40 mV cold to 20mV idle.
Power resistors are Welwyn 3W vitreous wirewound 5% 75PPM.
Other resistors are DALE RN55 series. Onboard caps are Nichicon Audio.
Sinks 48-49 celsius at idle.

More, sound is marvelous I second Neslon when he says that A_J is the best of Aleph series

Best,

nAr

[Marra]

Nice work Nar. Are you likely to make the boards available?

[nar]

Originally Posted by Marra

Nice work Nar. Are you likely to make the boards available?

Thank you

Hey. Those are private builds, but tested and bugfree.
I did this as a hobby, working on Gerber files and so on, with the precious help of Pierre my canadian friend it took time and efforts to get the real thing.
Those were done on a small batch ordrer; I only have 1 board left ATM, because the left ones are reserved for friends.
So quantity is very limited But for anyone interested, feel free to contact me by PM. Depending on interest, I may study possibility of having a new batch made, maybe in bigger volume if needed.

Please do understand my use of the word may ... As I also have a life out of DIY and must make a living. Those boards were just for fun. And they worked as expected

Best,

nAr

[merlin2069er]

Originally Posted by mhouston

Nice caps. Your build is almost a BoZoaC.

I guess. I used 2x 4700uf filter caps. I couldn't fit any more in my case.

[evanc]

here it is my freshly minted f-5. Thanks to Mr. Pass for this design, and all that have posted before me who answered my questions before I had them.

[routhun]

Simply superb! Salute to your wonderful idea to build the chassis with wood and mastery over wood working skills.

Enjoy

[vdi_nenna]

Nice case evenc. My f3 will look much like it, but a bit less lumber.
Nice lacour job!

[6L6]

OOOOOHHHHH!!!! Your casework is sublime! My most sincere admiration!

[norb]

@ preamp: Yes, partly. I use these heatsinks for industrial power rectifiers.

@ Jacco: Thank you. I was just too lazy to take photos, the A75 is working for three years now. In the meantime i built a B1/Pearl-Preamp, which i will upgrade to the Pearl II. Maybe i take some pics in a year or three.

Did you mean the four black circular things by uncommon rectifier diodes ? These are fuse holders, the rectifier modules can only be seen vaguely, they´re mounted on the bottom plate, where the red and black wires go to.

Hello evanc, very beautiful enclosure and superbly crafted. What kind of wood is it?

[evanc]

Thanks

The case is cherry.....a 2.5" thick piece left over from some paying project. The top is cheap 1/2" plywood veneered with curly sycamore....another leftover.

The finish is shellac. Applied with a rag and polished. Easy enough on a piece this small.