Sorry I haven't posted any results of my testing sooner. With the help of several folks on the forum I have been running the H-Bridge successfully using the transistor and bootstrap style high side drive and also using the
IR2110 driver. I discovered that the bootstrap diode I was using (1N4148)was too light and not allowing the gate drive voltage to get as high as it should.(i.e with the 12vdc, the gate drive should have been about 10vdc above that or 22vdc). I switched to the 1n4001. I also discovered that the bootstrap cap I was using (.1uf) was not large enough. I'm now using a 1uf bootstrap cap and am getting a solid 22vdc gatedrive voltage. The fets are not heatsinked yet but I can run them close to 3amps without getting too hot to touch(about 130F).
I also discovered that you can increase your gatedrive voltage easily by increasing the size of the bootstrap cap, however when I used a 10uf cap, I was getting around 32vdc gate drive voltage until something happened to the IR2110. The specs indicated that Max Allowed gate drive voltage would be your Battery or supply voltage plus 20vdc that put me running right at 12+20 or 32vdc which burned out the IR2110.
My next step is to add radio control capability and then create a double sided board with enough copper to support the 30amp fet capability. Would appreciate anybodys recommendation on a good system for making your own double sided boards.
Thanks, John