That's what I'm thinking based on Bill Fuss's comments. I would think a Plitron 300VA 18-0-18 or Antek AN-4218 400VA should work great for ~24V rails for a stereo version or single monoblock.
I used an Antec 400VA for the standard one and a 600VA for the higher powered one. They are pretty underrated IMHO.
8" long pieces are plenty, one per channel @90 watts diss.
Always nice to get a little confirmation, thank you
I'm most likely going to use the Antek AN-4218, I've had good luck with their transformers and use them whenever I want a toroid.
I was also eyeing the AN-6218 just for the extra-hugeness and overkill factor
It wouldn't cost that much more, but probably really wouldn't have much impact on sound quality and I would have that much higher of an inrush current to deal with.I have the 4218 in my F5 and I'm guessing it should be fine for the J. In my case, I may lean to the Plitron because it is slightly narrower, thus fitting the slimline package style I want. I hope to be able to place the heatsinks about 5-5.5" apart and span them with the X daughter board that is 3.25" (think of an "H").Always nice to get a little confirmation, thank you
I'm most likely going to use the Antek AN-4218, I've had good luck with their transformers and use them whenever I want a toroid.
I was also eyeing the AN-6218 just for the extra-hugeness and overkill factor
Not sure if that would be an issue if the + and - halves of the "X" are not tightly thermally coupled?
I don't know about the 2SK3700, but matched 2sj74's used in pairs is what many have done. The board layout accommodates 2 of them joined with a special heatsink that was part of a group buy some time ago.
I used .900A bias per fet. I tried cranking up the bias on the larger one (1.100A)because I have plenty of heatsinking, but in the end I did not like the sound and went back to .900.
That's tough to put into words, it's purely subjective. In my system the envelope of the sound field develops more naturally with the standard J bias. My spkrs are Seas Excel so they don't need any help with generating dynamics.
I've had an Aleph 5 for a few years and loved it, but the J is definitely a cut above that in transparency. I'm pretty well hooked on Single Ended after trying the F5, I just didn't like the clinical (to my ears) sound. This is just my own opinion and you know what they say opinions are like (Everybody has one).
very interesting project
with complete and accurate direction too
i receive all the package from u peter
thank you