bf Bassman question: phase inverter

[justinbelshe]

Hey Fender gurus...

I've been overhauling my '67 Bassman to follow Andy Ruhl's AA864/AB165 hybrid recipe...

I've tried to make the phase inverter look like the AA864, but I've run into a snag...

See where I've put the question mark? There should be a jumper from that point to... where, exactly?

[img:500:2082]http://i45.photobucket.com/albums/f100/ ... estion.jpg[/img]

AB165 board layout:

[img:500:2298]http://i45.photobucket.com/albums/f100/ ... Layout.jpg[/img]

AA864 board layout:

[img:500:2153]http://i45.photobucket.com/albums/f100/ ... Layout.jpg[/img]

Let me know what you think, and if you spot anything else I might have missed...

[justinbelshe]

Okay, I just redid my jumpers, copying the AA864 layout.

What do you think, will this work?

[IMG:500:2111]http://i45.photobucket.com/albums/f100/ ... 70-500.jpg[/img]

[justinbelshe]

Anyone? Anyone?

[justinbelshe]

Submitted for your perusal. I already know it won't work as it is, I'm just not sure why. I'm not even going to plug it in until I'm reasonably certain that I've got everything arranged correctly...

[img:926:2042]http://fc04.deviantart.com/fs17/f/2007/ ... ervert.jpg[/img]

Here's the color code for wires coming out of the doghouse:

[IMG:500:667]http://i45.photobucket.com/albums/f100/ ... 01-500.jpg[/img]

Here's the filter board:

[IMG:500:349]http://i45.photobucket.com/albums/f100/ ... ard500.jpg[/img]

[mlp-mx6]

Having a hard time tracing how the choke is connected. I see the double-caps for the plate supply, but I don't see the choke hooked up, so I'm not seeing how the voltage gets through your circuit.

Can you draw up how it is wired? Just a quick pencil sketch, labeling every wire/color and cap and resistor. That would really clarify this quickly for me.

[justinbelshe]

Having a hard time tracing how the choke is connected.

It's the two black wires coming out of that grommet.

[IMG:500:827]http://i45.photobucket.com/albums/f100/ ... wiring.jpg[/img]

[justinbelshe]

[IMG:500:667]http://i45.photobucket.com/albums/f100/ ... 97-500.jpg[/img]
[IMG:500:667]http://i45.photobucket.com/albums/f100/ ... 96-500.jpg[/img]
[IMG:500:667]http://i45.photobucket.com/albums/f100/ ... 95-500.jpg[/img]
[IMG:500:667]http://i45.photobucket.com/albums/f100/ ... 93-500.jpg[/img]