Hey 8bit:
The longer the boom and more elements on a TV antenna, the greater the gain in signal strength typically.
If you can repair that antenna you picked up for free, it might improve your TVs reception over your current workhorse, RCA ANT751R. However, if you're already in a strong to moderate signal area and your current antenna is picking up your market stations reliably, you may not notice much of an improvement as far as dBs go. Here's a previous TV Fool thread on your current antenna:
http://forum.tvfool.com/showthread.php?t=16264
If you don't mind sharing your market information from RabbitEars.info, I'm sure the forum could give you more specific help.
Anyway, that "wounded" antenna you picked up for free could be an interesting project for you and perhaps give it a new lease on life for your TV!
Also, to get the lowest insertion loss and increase your signal strength out of your balun, here's an excellent tip from a previous thread by rabbit73, that you might find of interest:
http://forum.tvfool.com/showthread.p...ed=1#post58266
Take care and keep the forum posted on your progress, please.