“After several attempts to build a multiband C-Pole I finally ended up with the Multiband H-Pole. C-Poles for different frequencies on one pole must be fed with separate feedlines over separate current baluns.
In a first attempt I fed the H-pole in the center with a ladder line. It was electrically no longer an “off-center-fed-dipole” as the C-Pole was, but a vertical, folded “doublet”.
The C-Pole is a resonant antenna, whereas the H-Pole is non resonant and must be matched with a tuner.
Construction and materials used for the H-Pole are similar to the C-Pole. I use non conductive glass fibre fishing rods, beware of conductive carbon fibre!
The first results are very promising. I had contacts with excellent signal reports within a few minutes on all bands except 80m at @ 12:00 UTC in July 2008.
I used the SG-239 Automatic Tuner (asymmetric !). So far, the sound of the automatic tuner, was “healthy”, only a few “clicks” and down was the SWR! I connected the lower half of the H-Pole to the ground connector, the upper half to the “hot” side of the tuner output.”
Elevation Diagrams H-Pole [black] Versus C-Pole [blue], 0.5m over MININEC-Ground, 20m-Band
The Azimut Diagrams for both antennas are omnidirectional
See EZNEC-File: multi-h-pole-tl.ez
See more: http://www.qsl.net/hb9mtn/hb9mtn_h-pole.html
Equipment
Yaesu FT-950 HF+6 TRANSCEIVER
Yaesu FT-950 HF+6 TRANSCEIVER The FT-950, the newest radio in the direct lineage of the FTDX-9000 and FT-2000 series radios, has been developed to fi... Read more
The ZN-9CRB IAMBIC KEYS by N3ZN
IAMBIC KEYS The ZN-9CRB, classic round base, has a 7/8″ x 3″ diameter brass base and weight 2 pound 4 ounces. This paddle is uni... Read more
Arduino Antenna Rotator – DIY
“After 5 years of operation of the antenna HexBeam I decided to remove the antenna from the chimney and put on a 10m mast in the garden. In the... Read more
RT-9000E SOFTWARE-DEFINED HF SSB/ISB RADIO
The Sunair RT-9000E is a proven solution in communications applications requiring rugged, reliable, and flexible equipment. This next generation trans... Read more
Icom IC-R20 Receiver
Scan, Monitor, Record — The Pro’s Scanner 2 for 1, Dualwatch receive Until the Icom IC-R20, the capability of monitoring two frequ... Read more
SmartLink™ for Remote Access – FlexRadio
Robust, Secure Remote Access to any FLEX-6000 – Operate from Anywhere Simple Click connect. It’s that simple. SmartLinkTM is designed fro... Read more
First Videos CRT 2000 !
CRT 2000 Videos – 40 AM / FM channel multistandard European – Power: 4 Watts AM / FM – Supply voltage: 12/24 Volt – 4 storable... Read more
YAESU – FT-857D
YAESU – FT-857D The FT-857D, the world’s smallest HF/VHF/UHF mobile transceiver, provides base station-type performance from... Read more
Ten-Tec Eagle HF DSP Transceiver
TEN-TEC has created a 100 watt transceiver combining simplified controls and ease of operation with the excellent performance of a low first IF... Read more
RS-918SSB HF SDR Transceiver
Spectrum Dynamic Waterfall Display Multiple Working Modes: Receive Mode, Transmit Mode, TUNE Mode, VFO Mode, SPLIT Mode DSP Digital Signal Processing... Read more
