The Comet CHA-250B is a newly designed broadband vertical requiring NO GROUND RADIALS.
This antenna is EXTREMELY easy to assemble, requires no tuning or adjustments and VSWR is under 1.6:1 continuously from 3.5MHz – 57MHz!
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- The RangeMax 1.0 1/4 Wave Ground Plane FM Antenna is made for broadcast professionals coupling a unique, omnidirectional co-linear design and easy assembly with the same durability all F-S Electronics products are known for.
It is not a 1/4 wave vertical, but an end-fed long wire type antenna with a matching transformer in a vertical position.
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Broadband:
TX 3.5 – 57MHz Resize sense 2 2 1 download free.
RX 2.0 – 90MHz
VSWR: 1.6:1 or less
Max Power: 250W SSB
Impedance: 50 Ohm
Length: 23’5″
Weight: 7 lbs 1 oz
Connector: SO-239
Mast Size Required: 1″-2″ diameter
Max Wind Speed: 67MPH
![Comet Comet](https://polyversemusic.com/wp-content/uploads/2019/06/Comet-Home-Page-TEMP-BANNER.jpg)
If you have the space, budget and desire to erect a full size antenna system we suggest you do so… bigger is better…however…if you live in an antenna restricted area and must manage with antenna or space restrictions or you simply wish to operate incognito you will be forced to make significant antenna compromises. The CHA-250B will make the most of these circumstances!
This is a the “magic” behind the CHA-250B, the transformer matching section.
The transformer on the original CHA-250 had smooth sides. 1 2 line segments and distance. The current version has a heat sink to dissipate heat created inside the transformer.
Yes, some of the RF that enters the power feeding section is turned into heat rather than transmitted as RF, but that is one of the compromises needed to create a broad-band, low SWR, multi-band HF antenna with minimal visual mpact.
5-Band, 1/2 wave rotatable dipole for 40/20/15/10/6 meters
This is the compact dipole used for HF communications on the set of the ABC Television show “Last Man Standing” with Tim Allen. The crowded space above the set required a compact multi-band dipole, and the CHV-5X was selected to solve the problem the minimal space presented.
Compact, lightweight, and easily assembled in either a horizontal, “V” shape or ground-plane configuration. Each band tunes independently of the others.
Comet engineers have specifically designed this antenna for those that desire a milti-band dipole that can be rotated if needed, but do not have a lot of room to install it.
If you have antenna restrictions, neighbors that tend to complain about antennas, simply want to operate without drawing attention…or you want a lightweight multi-band antenna to use in portable or emergency situations, the CHV-5X is a great choice.
Polyverse Comet 1 0 0 Minecraft
Max power:
40/20M 150W SSB
15/10/6M 220W SSB
40/20M 150W SSB
15/10/6M 220W SSB
Horizontal length: 13 ft approx
Weight: 5 lbs 14 oz approx
Impedance: 50 Ohm
Connector: SO-239
Mounting mast req’d: 1″-2.5″
Typical 1.5:1 or less SWR bandwidth:
40M: 22kHz
20M: 36kHz
15M: 54kHz
10M: 140kHz
6M: 1.8MHz
40M: 22kHz
20M: 36kHz
15M: 54kHz
10M: 140kHz
6M: 1.8MHz
As installed and used above the set of “Last Man Standing” starring Tim Allen
The H-422 is a broad-band, compact, rotatable dipole designed to offer excellent performance even when mounted at only 10-15ft above ground in a V or horizontal configuration.
Heavy duty hardware and 2.5kW balun are included.
During assembly the user chooses any of the three pre-drilled holes to tune the 20/15/10M SWR dips to the low – mid – or upper band ranges simultaneously. 40M TX bandwidth tunes independently of the other three bands.
Frequency Range: 7, 14, 21, 28MHz
Impedance: 50 Ohm
Length: “V” shape: 24 ft 5 inches
Horizontal: 33 ft 10 inches
Horizontal: 33 ft 10 inches
Max Power: 1000W SSB / 500W FM
Wind Load: 3.01 sq feet
Construction: Aluminum tubing, stainless steel hardware
80/40/20/15/10/6/2M/70cm compact 8-band vertical base station antenna
8 bands and only about 8 feet tall
Each HF band + 6M has it’s own tuning stub. Adjust the SWR to the desired band segment, then use an antenna tuner to TX outside of the 2:1 or less band-width. 2M and 70cm bands are pre-set at the factory and there are no adjustments.
Polyverse Comet 1 0 0 Mod
The ground radial system is unique…the radials are screwed into 2 collars. The collars can be rotated and fixed so all the radials are located to one side of the antenna….allowing it to be side-mounted on a tower, or next to a building wall for stealth operation.
Gain & Wave:
80-6M: 1/4 wave
146MHz: 1/2 wave 2.15dBi
446MHz: 5/8 wave x 2 5.5dBi
VSWR: 1.5:1 or less at resonant frequency
Max Power: HF: 200W SSB 6M -70cm 150W FM
Length: 8′ 6″ (approx)
Diameter: 8′ (max. approx)
Weight: 5 lbs 7 ozs
Connector: SO-239
80-6M: 1/4 wave
146MHz: 1/2 wave 2.15dBi
446MHz: 5/8 wave x 2 5.5dBi
VSWR: 1.5:1 or less at resonant frequency
Max Power: HF: 200W SSB 6M -70cm 150W FM
Length: 8′ 6″ (approx)
Diameter: 8′ (max. approx)
Weight: 5 lbs 7 ozs
Connector: SO-239
The HVU-8 was designed for those suffereing from antenna restrictions in mind.
Anticipating it may need to be installed hidden from view along the side of a building or home, rather than in the preferable location in free space, the ground radial system uses two rotating rings. The radials are screwed into the rings, and the rings can then be rotated so they all are on one side of the antenna rather than the preferred 360 degree spacing.
The SWR maybe negatively influenced by the spacing, but if you are in need of a multi-band HF antenna, that includes 6M 2M and 440MHz, and have little space or cooperation, you will need to make some compromises.