My psr 500 wasnt loud enough for me at all. I went on ebay and found a decent little amplifer board
2*15 watt @ 4ohm, TA2024 D-class Audio Amplifier Board on eBay.ca (item 230453629892 end time 23-Apr-10 03:19:11 EDT)
I hooked it up to the headphone output of my psr 500 and then connected it to my 2003 p71 cigarette adaptor. It worked great til I started the car and got a hateful whine from the fuel pump and alternator coming through the speaker. I figured out that I can attatch a wire to a ground on the amp board and then touch the other end to the outside of the bnc connector going into the scanner and it will almost dissapear. But not quite, just for peace of mind I have a drilled roof nmo with a comtelco antenna routed through rg58 up to my dash pad then into the psr. Please help. Much appreciated. By the way I also tried grounding the bnc connector to the car, then grounding the amp to the car. Nothings helping
2*15 watt @ 4ohm, TA2024 D-class Audio Amplifier Board on eBay.ca (item 230453629892 end time 23-Apr-10 03:19:11 EDT)
I hooked it up to the headphone output of my psr 500 and then connected it to my 2003 p71 cigarette adaptor. It worked great til I started the car and got a hateful whine from the fuel pump and alternator coming through the speaker. I figured out that I can attatch a wire to a ground on the amp board and then touch the other end to the outside of the bnc connector going into the scanner and it will almost dissapear. But not quite, just for peace of mind I have a drilled roof nmo with a comtelco antenna routed through rg58 up to my dash pad then into the psr. Please help. Much appreciated. By the way I also tried grounding the bnc connector to the car, then grounding the amp to the car. Nothings helping