Fender Vintage Amp Schematics X, B and D

[Amp'd Up]

Hello. I am new to the forum. I having trouble interpreting what X, D and B with box around them is.

Thanks!

[Teleguy61]

Correlate them with the AA1164/5U4GB schematic.
The letters indicate connection points in the dropping string of the power supply.

[Amp'd Up]

Can you elaborate on that please. What has to be connected to those points? Sorry I am not an electronics expert but I have a pretty good grasp on some of this stuff.

[Blackburn]

Just imagine that every point with a 'D' is a single wire running to all these points with nothing between from that point at the filter cap can. When I say single wire, I mean a single path that must make all these connections. 'D' connects to all the other 'D' points and it's the same for any other letter indicating a distance that they didn't draw on the schem or layout.

[Amp'd Up]

Ok. I think I understand now. So using the PR AA1164 as an example:

The V source of "D" is +240V from the cap can. (connect all D points).

The V source of "B" is +400V coming from pin 4 of the 6V6 (connect all B points).

The V source of "X" is pin 7 on V4 (PI) (connect all X points together).

Am I getting this right?

[Blackburn]

Sounds right. You may find it easier reading schematics, as they are a bit easier to find where all the letter points end up.