i have done pretty much all of the audio mods available to a 148 style chassis, and i have to say that just clipping R131 which is the AM mode modulation limiter makes the radio sound great!
the other mods do work, and may give different audio qualities, but after all my fiddling, just removing R131 works just fine.
yes, you can make the radio sound like crap by doing this.
if you are the type who just HAS to run the Dynamike at maximum, and you use a power mic, then you can distort the heck out of the audio.
if however you are sparing with the dynamike (i like about 2 O'clock) and just turn the power mic's volume up enough to get full modulation from the radio, then you will sound great.
just a couple of sidenotes. if you have removed TR24, or modified it in anyway; put it back the way it was with a 2SC945 transistor.
it will make SSB sound bad if its messed with.
also, if you have done the mod that tells you to change the values of R124 and R126, put them back the way they were.
you dont gain anything by changing these transistors because you just have to turn the mic gain down more to keep from distorting.
changing R114 to a 10K resistor will give you some more audio bandwidth on transmit.
so, just give the radio a good alignment, remove R131, and change R114 if you want to.
it will sound great.
LC
