I have the original am radio in my '71 Elky with an fm converter. When the key is on with the engine not running, it plays beautifully. With the engine running, all I get is static and alternator whine. I have the clip on top of the cowl and the woven ground straps from valve cove to firewall and fenderwell to frame. I do not have the condenser on the voltage regulator, which is a Wells solid state unit, or the one on the coil. Will ading these solve the problem? Can I use a points condenser with the proper end spliced on or is it something special? If these are not enough, what else will be required. The car is all stock, right down to the repro plug wires. Thanks!

You can try and run the car for a little tiny bit without the alternator belt on. If the alternator is not spinning that eliminates the charging circuit as the cause. Believe that belt also runs the water pump which is why I said a little tiny bit. A guess would be the noise is still there perhaps caused by the missing points condenser.
If all that doesn't work out there are aftermarket filters that go into the radio 12 volt line.

I have added the condensers to the coil and voltage regulator and the problem is exactly the same. I have removed the belt from the alternator and the static is gone and the radio plays without noise. Now what? This is frustrating, I have never had this problem on any of my old cars before. A friend suggested that the radio may have an internal problem, but I don't know if this is possible or how I would verify it.

Sometimes this can be hit or miss ... Check for a good ground on radio ... You can try shielding/insulating wires ...making sure antenna wire isn't mingled with power wires ... There are filters for the antenna ( crutchfield carries one ) ... You might try a different brand of alternator ( last alternative ) .. I am assuming that this is radio only, no external amp ...

try running over to http://www.the12volt.com/

you might find some good info over there ...

I will add a redundant ground to the radio and try a filter on the 12v side, pretty easy to do. If that doesn't do it, I may try another radio. Thanks!