thornev
Super Member
I've attached the images about the subject mod which I found elsewhere in this forum. Questions...
1. Is this one board enough for this mod or does the mod require left and right channel boards built the same way? The schematic refers to left and right dual op-amp IC's.
2. I count 4 input and output connections in the schematic: front level control, to other channel, to original bias lead, and new preamp output jack. Can someone be more specific about where in a 500-C these connections need to be made? I assume the "bias lead" connection can be anywhere that bias power can be tapped.
3. There are multiple TL082 op-amps. I bought TL082BIYDT and they look way too small and don't fit on my breadboard where I'm previewing the setup. I then purchased LF353N op-amps and am waiting for delivery. Can someone be specific about which TL082xxx is correct? I use mouser.com.
4. I'm using the attached completed board as guidance for how the mod should look. Does the build on the board accurately reflect the schematic? I would think so but want a sanity check.
The original post is here:
http://audiokarma.org/forums/index.php?threads/improving-the-fisher-400.511867/page-3, post 41
Thanks for helping. Thorne
1. Is this one board enough for this mod or does the mod require left and right channel boards built the same way? The schematic refers to left and right dual op-amp IC's.
2. I count 4 input and output connections in the schematic: front level control, to other channel, to original bias lead, and new preamp output jack. Can someone be more specific about where in a 500-C these connections need to be made? I assume the "bias lead" connection can be anywhere that bias power can be tapped.
3. There are multiple TL082 op-amps. I bought TL082BIYDT and they look way too small and don't fit on my breadboard where I'm previewing the setup. I then purchased LF353N op-amps and am waiting for delivery. Can someone be specific about which TL082xxx is correct? I use mouser.com.
4. I'm using the attached completed board as guidance for how the mod should look. Does the build on the board accurately reflect the schematic? I would think so but want a sanity check.
The original post is here:
http://audiokarma.org/forums/index.php?threads/improving-the-fisher-400.511867/page-3, post 41
Thanks for helping. Thorne