Give a soldering Iron to a knuckle head and you get a golden screwdriver radio on eBay. The best modulator circuit I have ever seen is the one built into the S45HP. Set it for 2 watts dead key and swing for the fences with 70 to 80 watts peak. Always got good reports for sound quality, signal strength and it looked good on the scope and with the spectrum analyzers. The person on the other station would always notice the S/RF meter bouncing with the modulation.