Hello, I have a very clean Drake R-4C HF receiver for sale. The R-4C has no chassis corrosion and a clean front panel. The receiver has the GUF-1 crystal filter, and the following Sherwood mods: 1) product detector, 2) power supply board and 3) audio amplifier. The receiver was serviced and aligned by Sherwood. Will sell for $550 plus shipping. 73, Mike KF2LF Rochester, NY