If you read between the lines, I said basically the same thing back there in
my original post!
If you really want to trick the R-4C out, acquire the Sherwood mods package.
Sell the "C" to a DXer and invest in a "B" and go from there... You might have
enough left over for a pack of gum or something...
Actually, there is a way to make the receiver perform like a Pro plus more.
Build a SoftRock SDR unit on the output frequency of the first IF stage of
the R-4C and feed that to a computer running Power SDR Software. That
will give you every mode available on hf shortwave, including panadaptor
and waterfall displays...(LSB, USB, CW, AM, FM, Sync Detector, etc)
To prevent overloading the first mixer in the receiver use an 102 fet isolation
stage between the mixer plate and the SoftRock board. Power the added board
from the receivers 12vdc source and use the open hole on the back of the
R-4C to run the SR output to the audio in on the computer. Connect HiFi amp
to computer AF output...
The above would work with any of the R-4's as well...