Hi, can any body help me in making H-bridge using relays which can provide current up to 6+ amp i also tried transistors tip122/tip127 but was not able to get the required current can anybody suggest something else which can work.
USE IR3220
You can use relays but I advise you to use transistor since relays emit electromagnetic waves which can effect other sensitive components like receivers.
Anyway if you need the sch let me know
On the early days of valve radios in cars they had such things. It was two synchronized banks of DPDT contacts. The first made a square wave AC and then it was sent to a step up transformer and the second set of contacts produced DC.