LoveNRG wrote:We haven't changed a thing apart from changing where the audio was sourced from thats all however we were testing a new TX yesterday and for the brief 10 mins before it blew up were booming out much better , sad thing is we only just had it repaired ready to come on with a much better signal but it wasnt too be as i speak its being repaired again and hopefully in a week or two we will be back with a much larger scale signal so hold tight all

Did you check the SWR? It's all well and good getting it repaired but if the aerial is out of SWR it's going to keep on blowing.
...I've found your audio source can add noise to the carrier and decrease your signal quality, a bit like with excessive RDS level.