Also I'm replacing the power cable - do most of you use the 3 prong polarized plug and use the grounding wire to ground the chassis? (instead of using the regular gound terminal on the radio)
Thanks, Steve
Wire rated for 600v is easy to find and will exceed about anything you will find in your radio. Use same gauge wire as what you are replacing. Use stranded wire to replace stranded, and solid to replace solid where possible. It's also important to follow the same physical layout as the original wire to avoid interaction with other circuits. Try to use the same color as original since most circuits have color coding schemes. I would use standard 2 conductor AC cord with the polarized plug (one wide spade and one narrow). Just be sure the hot side (narrow spade) goes to the on-off switch.
Steve
I agree with Steve. Use a regular lamp cord, available at any hardware store. Get one that is polarized, that is to say one prong is wider than the other so it will only go on one way. The wide prong is the neutral, or, incorrectly, the ground. That one you want to go t0 the chassis. The narrow one goes to the power switch. Now, you will have a radio that someone will have to work at to get shocked.
Lewis
Sorry, but I'm getting a little nervous about "chassis" and "ground" talk with new people. You want to make the AC/DC radio safe ON or OFF. This from Phil's Old Radios, http://antiqueradio.org/safety.htm, in case it might need some clarification.
Bill
You'll want that to go to the chassis assuming that you have a line powered set such as an AA5. That won't usually be the case with a transformer powered set ;)
Many AA5 sets have the power switch in the chassis lead. In these cases the ground or neutral lead should go to the switch.
Note that on polarized lamp cord the neutral wire is ribbed and the hot wire is smooth.
Jim
If you see that on an existing AC/DC radio it has one side of the power-on/off switch wired to the AC line and the other side of the power-on/off switch going directly to the metal chassis... then you should put your ribbed-neutral side of your NEW AC cord to the switch where the old AC wire went.
If however your AC/DC radio already has a "floating ground" (B minus)... then, in that case you connect the HOT side of the AC power cord to the switch.
Steve, if you are going to put in the polarized line cord you should check first to see if on/off switch in chassis leg of set. If so you may want to move switch over to high side and then run high side of line cord there and nuetral to chassis. PL