"Aaron Burr" wrote in message
...
lsmyer wrote:

Sensitivity: Despite being the least expensive out of the group, my
trusty SRIII picked up at least a whisper of a station on nearly
every single frequency (A+)....

Out of curiosity, has anyone built a homebrew version of the SRIII?
I suppose with the addition of a calibrated tuning scale, and maybe
a few other improvements here and there, it will be a very good AM DX
machine. Doesn't it use a variable inductor for tuning?


No. It uses varactor tuning. Voltage changes the capacitance of a diode,
which is used for the tuned circuit instead of a standard variable
capacitor.