Have you tried using that radio with the amp? It may work. Worth a simple try. Even though that radio may seem like junk, it's a great radio for testing and they actually work quite well on AM. Don't be fooled by the size! Again, leave the radio where it is, at 1w dead key and see if it will key the amp. Don't worry so much about power readings as in getting big numbers. This is just to verify that the amp will infect work with a lower output and dead key, that being 1 watt. JMHO. But like I said before, don't stay on the key too long!! Hope this helps and keep us posted. And be safe!!!