3 prong plug conversion

[Bmhanner]

I have a 1966 B15NF and need to change the 2 prong plug to a 3 prong. Does anyone have a wiring diagram for this.

[Bmhanner]

Actually, in reviewing the schematic it seems I would wire this just the way it was originally, with the following exceptions:

1. Remove wire going to "Death Cap" and the cap itself
   
2. Rewire the Ground switch to move the black wire to where the Death Cap was
   
3. Add a jumper from the top of the ground switch (with the white wire from the new AC cable and the black wire from the transformer) to the bottom, so no matter which position the ground switch is in, the white wire is always selected
   
4. Attach green ground from new AC cable to chassis
   

Does this sound right?

[Bmhanner]

Well, in looking at the actual circuit I see this would not be a good idea! Having the hot lead on the center of the ground switch would lead to a dead short!

I know folks are hesitant sometimes to offer advice given the voltages we are working with here, but I'm familiar with the discharge processes and have worked on quite a few Fender amps. This is my first Ampeg and I'm still trying to understand the circuit. It seems to me that rewiring the ground switch is key to this process.

If anyone can help me out with a diagram of how this should be wired I would be greatly appreciate it. I don't want to proceed until I fully understand the circuit, and I'm not quite there yet.

[Bmhanner]

It appears I've been way overthinking this!

1. Remove all wiring from the ground switch along with the death cap
   
2. Attach hot lead (black) from new AC cord to top tab of On/Off switch
   
3. Bottom tab of this switch goes to the fuse (existing)
   
4. Other end of fuse goes to transformer primary (existing)
   
5. Solder and heat shrink common lead (white) to other end of transformer primary
   
6. Attach green lead (ground) from new AC cord to solid chassis ground
   
7. Done
   

I would think this would be a common question but couldn't find the answer here, so perhaps this will help others looking to do the same thing.