Others
- 030: Dual tracking DC power supply (JA0TAQ)
- 029: Helmholtz resonant type of loudspeaker for CW (ver.3)
- 028: Extra: Record player
- 027: Simple send/receive control box for EME (K5AZU)
- 026: CW noise smoother (JM1MCF)
- 025: 50MHz low pass filter
- 024: High Q ferrite bar antenna for BC band radio
- 023: 7360 mixer and its IIP3 (50MHz)
- 022: Single ended FET mixers and their IIP3 (50MHz)
- 021: ATT adapter for self-monitoring while sending
- 020: Simple high pass filter for digital-TV interference
- 019: Capacitor and “Q” (at 50MHz)
- 018: Coil and “Q”
- 017: Noise blanker
- 016: 100KHz crystal calibrator
- 015: The cartoon illustration on the equipment making guide book of HAM radio
- 014: Variable ATT with stand-by control (for QRP experiment)
- 013: Helmholtz resonant type of loudspeaker for CW (ver.2)
- 012: Automatic "CQ" voice caller
- 011: Speech processor
- 010: VXO unit for 50MHz AM transmitter
- 009: 70V DC/DC converter for 3A5 portable transceiver
- 008: QRP operation rack (ham radio diorama)
- 007: 432MHz BPF (4-pole Butterworth)
- 006: 50MHz BPF (strip-line)
- 005: Helmholtz resonant type of loudspeaker for CW
- 004: Noise canceller for HF low band reception
- 003: Audio CW filter
- 002: Electric keyers
- 001: DC power supply