4 meter
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Antennas : 15M- Zippiro antenna for 40 Meters
- Very compact and high efficiency antenna ,very low radiation angle even at low height.
[ Hits: 2112 | Votes: 3 | Rating: 5.67 ]
- ZMV Spiral antennas
- An experimental antenna similar to the TAK spiral antenna was evaluated for SWR response
over the frequency range of 7.0 to 7.3 MHz, or the 40-meter band.
[ Hits: 3431 | Votes: 8 | Rating: 5.37 ]
- Design & Performance of a Choke Balun
- Design & Performance of a Choke Balun and Balanced Transmission Line by G4FGQ
[ Hits: 1282 | Votes: 3 | Rating: 4.33 ]
- 40 m Band Delta loop Antenna
- 40 meters band Delta loop antenna plan that is vertically polarised
[ Hits: 9721 | Votes: 19 | Rating: 4 ]
- 40/80 Trap Dipole Design
- An home made trapped dipole antenna for 40 and 60 meters band by 2E0HTS
[ Hits: 2575 | Votes: 4 | Rating: 7.75 ]
- Inverted V Dipole for 10 15 20 meters
- Inverted V Trapped dipole antenna for 14MHz,
21MHz and 28MHz ham radio bands.
[ Hits: 1295 | Votes: 0 | Rating: 0 ]
- Folded dipole antenna by N4SPP
- A quarter size cobra dipole antenna, a multiband dipole antenna for 40 to 10 meters basedn on original cobra dipole design but with a limited space by N4SPP
[ Hits: 2619 | Votes: 1 | Rating: 8 ]
- 50MHz 4 elements HB9CV antenna
- 4 elements HB9CV antenna for six meter band by JA1HWO
[ Hits: 3392 | Votes: 17 | Rating: 4.41 ]
- J-Pole for 14MHz
- 20 meter wire j-pole for 14.2 MHz, a vertical, end-fed half wave antenna by N1LO
[ Hits: 5227 | Votes: 3 | Rating: 5.67 ]
- 20 Meter Jpole Vertical
- The J pole vertical for 14MHz is built from a fifty-foot TV push up mast by Mike Higgins, K6AER
[ Hits: 7837 | Votes: 6 | Rating: 6.5 ]
- RX antenna for 160/80 meters
- RX Antenna 160m/80m Band Splitter/Switch, a small project that will work along with the K9AY RX antenna
[ Hits: 2058 | Votes: 0 | Rating: 0 ]
- OCF 2-Meter Sleeve Dipole Antenna
- A 144 MHz dipole antenna made from coax, PVC pipe, and aluminum foil tape
[ Hits: 3091 | Votes: 7 | Rating: 4.85 ]
- Multiband HF Vertical
- A telescopic pole that you adjust to suit the band you're working on , tested on 40 20 and 15 meters band by M0PZT
[ Hits: 2379 | Votes: 5 | Rating: 7 ]
- WA4FC/B 10 meter Beacon
- 28.231 MHz beacon ay WA4FC
[ Hits: 177 | Votes: 1 | Rating: 8 ]
- QROlle, 6 Band QRP-rig
- QROlle QRP-rig. 6 Band Shortwave rig with SMD:s.
160, 80, 40, 30, 20, 17 meters SSB/CW QRP-rig.
All documentation in English
[ Hits: 2235 | Votes: 2 | Rating: 9.5 ]
- GAP Titan DX - Test Details
- GAP Titan DX 10 15 20 40 meter performance tests by AA3RL
[ Hits: 851 | Votes: 0 | Rating: 0 ]
- 5-band RF Power Amplifier
- This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands
[ Hits: 6951 | Votes: 5 | Rating: 7.4 ]
- A 40 meter SSB QRP transceiver
- This transceiver was conceived as a power-efficient, small, lighweight unit to be carried in the backpack, along with antenna and battery.
[ Hits: 2298 | Votes: 1 | Rating: 1 ]
- QRP transceiver for 7 Mhz
- An optimized QRP transceiver for 40 meters band
[ Hits: 1216 | Votes: 2 | Rating: 5.5 ]
- DSB/CW QRP rig for 20 and 40 mt.
- An experimental DSB/CW QRP rig for 20 and 40 meter bands
[ Hits: 1404 | Votes: 1 | Rating: 10 ]
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