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mchaos the original set of RFX that came out with no pre installation check list and it was hit and miss on figuring out the problems. Your dk is way to high and what voltage are you running it at. Either your meter shows happy watts or something is off because 150w is an unrealistic number for that radio or any other radio. If you run it at 13.8v and set the dk to 12-15w(max) then it will hit around 75-80w. If you installed the Cap and resistor at JP36 then remove it and run it without it, otherwise it will sound like crap. Heck for $40 and getting 4 times the PEP power out of the radio and it will sound crystal clear and awesome. If you continue to have the hum at any point then look to the driver and final in the RFX; there is a quality issue there with the soldering of the pins of the transistors to the board. I know you made the wires as short as possible but that may be a downfall to any repairs that could be made without completely removing it. As long as you tied the wires up and kept them up and away you should have left them alone and kept them factory length. If you had problems like the hum you could have backed out the 2 screws holding it in and touched up the solder points of the transistors with a pinpoint soldering iron and eliminated it possibly.

<blockquote data-quote="Cityboy" data-source="post: 203931" data-attributes="member: 8486"><p>mchaos the original set of RFX that came out with no pre installation check list and it was hit and miss on figuring out the problems. Your dk is way to high and what voltage are you running it at. Either your meter shows happy watts or something is off because 150w is an unrealistic number for that radio or any other radio. If you run it at 13.8v and set the dk to 12-15w(max) then it will hit around 75-80w. If you installed the Cap and resistor at JP36 then remove it and run it without it, otherwise it will sound like crap. Heck for $40 and getting 4 times the PEP power out of the radio and it will sound crystal clear and awesome. If you continue to have the hum at any point then look to the driver and final in the RFX; there is a quality issue there with the soldering of the pins of the transistors to the board. I know you made the wires as short as possible but that may be a downfall to any repairs that could be made without completely removing it.&nbsp; As long as you tied the wires up and kept them up and away you should have left them alone and kept them factory length. If you had problems like the hum you could have backed out the 2 screws holding it in and touched up the solder points of the transistors with a pinpoint soldering iron and eliminated it possibly.</p></blockquote><p></p>

[QUOTE="Cityboy, post: 203931, member: 8486"] mchaos the original set of RFX that came out with no pre installation check list and it was hit and miss on figuring out the problems. Your dk is way to high and what voltage are you running it at. Either your meter shows happy watts or something is off because 150w is an unrealistic number for that radio or any other radio. If you run it at 13.8v and set the dk to 12-15w(max) then it will hit around 75-80w. If you installed the Cap and resistor at JP36 then remove it and run it without it, otherwise it will sound like crap. Heck for $40 and getting 4 times the PEP power out of the radio and it will sound crystal clear and awesome. If you continue to have the hum at any point then look to the driver and final in the RFX; there is a quality issue there with the soldering of the pins of the transistors to the board. I know you made the wires as short as possible but that may be a downfall to any repairs that could be made without completely removing it. As long as you tied the wires up and kept them up and away you should have left them alone and kept them factory length. If you had problems like the hum you could have backed out the 2 screws holding it in and touched up the solder points of the transistors with a pinpoint soldering iron and eliminated it possibly. [/QUOTE]

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