A little candohm assistance

[bigaudioal]

Note: the picture of the resistor is oriented the same as the picture of the schematic. So the yellow wire on the left is going to pin "N," the orange wire to pin "M," and the red wire to a terminal strip in the chassis.

Also, can I use the center terminal of the old candohm as a mounting point? Leave the orange wire there and attach one end of each new resistor there. Then remove the yellow and red wires from the old candohm and connect to the proper new resistors?

[Notimetolooz]

Do the replacement resistors have wire leads? If they do, I wouldn't leave the junction of the yellow or red wire just float in the air. If they are the tubular resistors with solder lugs then soldering one of the lugs each to the center candohm lug should be OK.

[Kevin Kuehn]

Those values should work. Sometimes (if chassis space permits) you can spread open those candohm mounts and remover the resistance element wire. Then reinstall the terminals and insulation. Mount the replacement resistors to the terminals. Wires stay in their original places.

[bigaudioal]

I think to be safe I would cut off he old unused tabs on the old candohm so there is no chance of them coming into contact with anything. Then the only tab remaining would be the one holding the new resistors.

[M3-SRT8]

Originally Posted by bigaudioal

I think to be safe I would cut off he old unused tabs on the old candohm so there is no chance of them coming into contact with anything. Then the only tab remaining would be the one holding the new resistors.

Or, do what I do. Put a length of heat shrink tubing on the now dormant metal tab.

Put the same color heat shrink on the end of the wire going to the new ww resistor nearby. Then you, or anybody in the future, can tell at a glance what you did.

I usually do this when I hang new radial electrolytics underneath canned multi-sections. Red for A, Yellow for B, Blue for C.

Looks pretty.

[bigaudioal]

Thanks for all the replies. Since there is plenty of room around this candohm, I may try and pry it open, gut it and leave the original three tabs and insulation to mount the new resistors to. This way no chance of the original candohm interfering with the new resistors, but will give me great mounting points.

At least I understood the schematic and wiring on this candohm and how to replace it with these two new resistors. Baby steps!!!

Each time I encounter a new part to replace that I have not done before, I learn.

[earlyfilm]

Originally Posted by bigaudioal

Also, can I use the center terminal of the old candohm as a mounting point? Leave the orange wire there and attach one end of each new resistor there. Then remove the yellow and red wires from the old candohm and connect to the proper new resistors?

Only if you first remove all three wires and check the candohm for center terminal to chassis resistance.

Many candohms carbonize the insulator when they overheat and fail, and that leaves a high resistance path to ground.

Overheating also boils out the wax that was formerly kept the insulator dry and that too can cause them to absorb moisture on a damp day, although this normally is not a problem as they almost never were used in critical circuits.

James