9 band

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9 band

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Antennas : 20M : 20 meter Yagi antennas Antennas : 40M : 40 meter Dipole Antennas
  • Portable Dipole Antenna for 7 MHz - A simple portable dipole antenna for the 40 meter band using a total lenght of 18 meter. It can be used for 80 to 10 meters coverage using a antenna tuner.
    [ Hits: 322 | Votes: 2 | Rating: 7.5 ]
Antennas : 40M : 40 meter Yagi Antennas Antennas : 70cm
  • Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.
    [ Hits: 3545 | Votes: 3 | Rating: 8 ]
Antennas : Delta loop
  • The GM3VLB 5 Band mini delta beam - HF multiband mini delta compact and easy assembling antenna that cover from 20 to 10 meters by GM3VLB
    [ Hits: 11277 | Votes: 11 | Rating: 6.73 ]
Antennas : HB9CV
  • HB9CV antenna for 70 cm - An HB9CV antenna for the 70 cm band in french
    [ Hits: 4555 | Votes: 13 | Rating: 5.15 ]
Antennas : J-Pole Antennas : Multiband
  • Vertical antenna for Vacation - Vertical Vacation Antenna for 80, 40 and 20 Meter-Band, by Herbert OE3BMB This antenna is a full size λ/4 for 20m and 40m band, and a shortened λ/4 for the 80m band. Generally on the 40m band the SWR is under 1,6. In 80m and 20m band at the resonant frequency the SWR is about 1,1.
    [ Hits: 5033 | Votes: 4 | Rating: 8 ]
  • Offset multiband trapless antenna - Simple, easy to build, low cost, compact, multiband By Robert Wilson, AL7KK
    [ Hits: 2115 | Votes: 2 | Rating: 9 ]
  • Four Band Antenna - This 4 band up and outer antenna covers 21 to 10 Mhz and can work on 28 Mhz as well by W9SCH
    [ Hits: 2372 | Votes: 2 | Rating: 6.5 ]
Antennas : Theory
  • Vertical and Above - Using vertical on six meters band and above, by Peter Schleuss, HB9RUZ
    [ Hits: 352 | Votes: 0 | Rating: 0 ]
Antennas : Tuners
  • MFJ-940 modification - The MFJ-940 VERSA TUNER II is a useful little antenna tuner for the HF-bands. However it suffers from a minor design error, which can be easily rectified.
    [ Hits: 2647 | Votes: 2 | Rating: 7.5 ]
Antennas : Vertical
  • Butternut HF9V Project - WB3AAL setup project of the popular HF9V vertical antenna with report on tuning it on ham radio HF bands
    [ Hits: 799 | Votes: 2 | Rating: 5.5 ]
Antennas : W3DZZ
  • W3DZZ multiband dipole - The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz. The overall top length needs to be approximately 32.9 Meters
    [ Hits: 10460 | Votes: 20 | Rating: 6.9 ]
DX Resources : Beacons : Beacon stations
  • IK6BAK / beacon - 24915 KHz 12 mtrs band from JN63KR
    [ Hits: 406 | Votes: 0 | Rating: 0 ]
Operating Modes : SSTV : SSTV Images
  • Digital SSTV images - HAMDRM pictures received on 80 meters band at 3733 KHz
    [ Hits: 291 | Votes: 2 | Rating: 10 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • WideBand for Yaesu 817 857 897  pop - Free Download of Widebander. This software will allow you to extended TX for the Yaesu FT 857 FT 817 FT 897 and reset back to standard factory defaults. Warining: this programs looks like not to be supported. Download and use it at your own risk.
    [ Hits: 41144 | Votes: 65 | Rating: 6.14 ]
Technical Reference : Amplifiers : HF Amplifiers
  • KENWOOD TL-922 Modifications - Allow 9 bands and 1300 Watt output on the TL-922 amplifier with this document by PA0FRI
    [ Hits: 2844 | Votes: 9 | Rating: 3.89 ]
Technical Reference : Duplexers
  • Diplexer 2m 70cm - This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band by hb9abx
    [ Hits: 3787 | Votes: 12 | Rating: 7.75 ]
Technical Reference : Filters
  • Interdigital bandpass filter designer - Fill out the form to design a bandpass filter as described in the January 1985 issue of Ham Radio Magazine. These filters are generally limited to frequencies above 200 MHZ because their size is slightly longer than 1/4 wavelength
    [ Hits: 1115 | Votes: 6 | Rating: 7.67 ]

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