Heathkit-hd-1420-vlf-converter SCHEMATIC2 – Manual (PDF)
Heathkit HD-1420 VLF Converter SCHEMATIC2 manual aids in troubleshooting and repairing with detailed circuit diagrams. File size: 383.4 KB.
SCHEMATIC2
Heathkit-gr-64-receiver SCHEMATIC2 – Manual (PDF)
Heathkit GR-64 Receiver SCHEMATIC2 PDF (2.8 MB) aids technicians in troubleshooting and repairing the receiver’s circuitry.