Hi fellas,
Populating this board and goofed a little on my original BOM order. If any of you savvy builders have a pair of 2K ohms Bourns 3299 or 3296 multiturn pots (for R7) you can drop in the mail, I will compensate. I am located in the continental USA. I will try to post a WTB in the swap meet as well if no takers here.
Thank you,
Anand.
Populating this board and goofed a little on my original BOM order. If any of you savvy builders have a pair of 2K ohms Bourns 3299 or 3296 multiturn pots (for R7) you can drop in the mail, I will compensate. I am located in the continental USA. I will try to post a WTB in the swap meet as well if no takers here.
Thank you,
Anand.
I have two of these I can mail out.
I can't remember if the board takes three straight leads or a triangle of leads. These have three leads in a strait line.
Alan
Finished my Aleph J today, it takes a few minutes before it comes to life. I understand why other builders were hesitant during the initial start up. Patience.
I used the 4U chassis, standard power supply with 22,000uF caps, Vishay film caps, and a friend sent me a pair of Audicaps for C2.
I set bias to 400mV with less than 1mV of offset on each channel.
I used the 4U chassis, standard power supply with 22,000uF caps, Vishay film caps, and a friend sent me a pair of Audicaps for C2.
I set bias to 400mV with less than 1mV of offset on each channel.
Attachments
Congratulations on your build! Enjoy the music, the Aleph J is a great amp.
Looks good! Congrats!! I need to dig back into mine and mount my transformer vertically, like yours. I like the extra space if buys in the 300mm chassis
What do you mean by this? Doesen't it play music from the first second you switch it on?
mbrennwa -
What I meant, is that when I first put mains power to the amp, it took a couple of minutes before I was able to adjust offset and bias on each channel. The right channel came to life 30 seconds before the left channel. It seemed like an eternity, even though it was only a couple of minutes. During that time I was trying to figure out what I did wrong, I used a Variac to supply mains and it did not blow a fuse, which I select at 1 amp less than N.P. suggests in the schematic. So I was at a loss to figure out what was wrong, until I remembered reading about others with this same problem.
What I meant, is that when I first put mains power to the amp, it took a couple of minutes before I was able to adjust offset and bias on each channel. The right channel came to life 30 seconds before the left channel. It seemed like an eternity, even though it was only a couple of minutes. During that time I was trying to figure out what I did wrong, I used a Variac to supply mains and it did not blow a fuse, which I select at 1 amp less than N.P. suggests in the schematic. So I was at a loss to figure out what was wrong, until I remembered reading about others with this same problem.
Distortion analysis, left channel is the first pic and right channel the second. Primarily an H2 amplifier, so I'll use my BZLS preamp to listen to the first music made. I plan on playing music on the amp the rest of this week and then substitute amp and preamp for the M2X with B1Korg preamp currently in my listening room.
