ATS-909 Modification and Alnment - The ATS-909 / DX-398 is certainly one of the great portable shortwave receivers ever made. It well outperforms my old DX-160, and does more than my Heathkit HR-1680. Despite this. Schematic ATS-909 Schematic, DX-398 HF Receiver Schematic.
Heathkit Virtual Museum HR-10 It performs reliably, has many fine features, and is widely available at a reasonable cost. HR-10. Amateur band coverage only 80 through 10 meters for hh stability & tuning. Two IF amplifiers operating at 1680 kc provide good image rejection.
G3ZPS - sn Lookup by QRZ. COM It well outperforms my old DX-160, and does more than my Heathkit HR-1680. I will not repeat the numerous improvements to the ATS-909 that may be found on other modification websites, such as but will limit my comments to a few changes that mean the most in my shortwave listening experience with the receiver. Bander a basket case but restored to full operation, Heathkit HR-1680 RX. I discovered errors and errata in the manuals relating to the FM.
Heathkit hr 1680 manual:
Rating: 100 / 100
Overall: 97 Rates