When it comes to Cobra 148/2000GTL receive mods there seems to be only a few. The most notable able is the (1) 1st rf amp and (2)dioide swap and finally the (3)"Goldfinger" cap mod. I purchased all the parts to do the 3 mods. As I stared at the parts I thought, "Wow, lots of parts...I hope I don't mess it up and have to put the covers back on and say I'm sorry..." At any rate, I proceeded to start replacing and after a short amount of time it was complete. The performance was dismal at best. Kinda like a jedi mind trick..."Your radio receives better.." , not quite. Almost the exact same feeling of putting louder exhaust pipes on a car makes it feel faster. I really did feel as if I had received a "Goldfinger", and not the radio. Anyway, I sough out a "more better" approach and here is what I have built, installed and now currently run: 1. Crystal IF Filter (7.8Mhz) 2. Low Distortion/High Dynamic Range Detector Link to Schematic of the Detector: http://www.amwindow.org/tech/htm/lowdisdet.htm The audio that pours from that radio is FANTASTIC. The IF filter really cuts the noise down and puts a leash on bleedover, it also adds a scoshi gain right in the 7.8mhz bandpass. Nice... The new detector is really nice. When listening the high dynamic range is very apparent as the sound is full, warm and more natural sounding. This setup can demodulate up to 200% modulation and it really shows. I recommend this setup up as a much higher performance alternative to the RX mods out there. The only "mod" I did was taking the output of the detector and running the audio through a second opamp, boosting to line-level then out to a much better audio amp and speakers. I don't want my precious recovered audio molested by half rate coupling/bandwidth limiting circuits/caps and the worst high-level audio amp (TA7222 ..blah..) Cobra could have used, ever. I've also included an audio clip of the detector in action. My personal taste is he needs a bit more highs but over all I like it.