MC-2125 mono bridge buss

MC-2125 mono bridge bus

Here is a neat DIY to bridge the autoformers on a MC-2125 for running it in mono. The screws are where the spades attach which is handy if you already have "normal" spades mounted on your cable! After fabrication the bus was buffed on a polishing wheel and treated w/ Pro-Gold.

Source of copper???? Seamless Copper Water Tube Type M

Here is some data on the alloy used......

Manufactured to ASTM B 88 – Standard Specification for Seamless Copper Water Tube, manufactured from copper alloy C12200 having a chemical composition of a minimum of 99.9% Copper (Cu) and Silver (Ag) combined and a maximum allowable range of Phosphorous (P) of 0.015 % - 0.040 %.

Applications Used for seamless copper water tube, electromechanical hardware connectors, bus bars, etc.

Principal Design Features
Copper, DHP, Phosphorus-Deoxidized, High Residual Phosphorus. Deoxidization gives improved embrittlement resistance during welding. Has conductivity 85% IACS.

Information sources
http://www.copper.org/applications/plumbing/techref/tpf_stds/tube_pipe_stds.htm#top
http://www.metalsuppliersonline.com/propertypages/C12200.asp#chemistry

Man that looks really dangerous. It looks like the 2 speaker screws are going straight into the rear chrome frame of the amp - thereby directly shorting the speaker outputs. At the very least those huge cooper jumpers are waaaay too close to the frame. I would rather use a small piece of wire with spade plugs fitted on both ends and use it as a jumper. Much safer.

Your right IT does LOOK close,but in reality it is not. I thought about that when playing with my "design".

What I failed to mention was that there is about 1" of space between the chassis and the back of the brass nut/bolt. The copper bus is strong and doesnt bent easily, I tested it, too make sure.

A straight on picture doesn't give you the full view. I was going to make a strapping harness w/ some Mc sized spades I had on hand and mil spec silver/cu/teflon wire I had on hand, but this has fewer mechanical joints.