Hi everyone, I have a touring caravan with both 12v dc & ac mains. I have installed an LCD combo tv & the sound quality is very poor due to the speaker sizes.So I made up a 25w stereo amp from a module (*bay) this works fine except for a buzzing noise which I have discovered is coming from the onboard battery charger(?). If I turn on any 12v appliance it gets louder/worse as the charger tries to compensate for the loss/demand. Even an LED lamp causes this. So I guess a smoothing/ripple circuit is needed, but where? In the output from the charger, or the input to the amp? And if so how would I make this? I'm guessing some large capacity Electrolytic caps 50v? might be the answer. Also, the output from the TV is via the 'Headphone out' socket and is way way too loud, even with the amp gain set at it's lowest setting (there is no volume control on the amp, only gain) we have to use the TV with only 1 or 2 'bars' of volume which is still quite loud. There was a suggestion that a 50k dual pot might be used to aleviate the problem, on the line in.However I would not like to compromise the TV as it is still under warranty. I would be eternally grateful if some of you experts could advise me. This is my first visit to the forum so I hope I have not infringed any rules. Best wishes to all Alex
Last edited: