Instruction Manual
MODEL
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Features
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● It is a 3-division structure that is convenient to carry.
● Telescopic antenna for multi-band HF to 50 MHz band, whose frequency can be easily changed by short plug.
● Round-shape solderless Terminal for counterpoise is included. (Stranded wire: 3.5 sq [AWG12] compatible)
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Product image
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accessories
Short plug
Cautions on installation
◆
This product is not suitable for mobile use. Please do not set it on the vehicle and drive.
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If there are other antennas or obstacles such as buildings near this antenna, this will cause
SWR degradation and resonance frequency shift. In that case, please change the mounting
position of the antenna.
!
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Make sure that the connector of the connection cable and the antenna connector are of the
same type.
If it is a different type, it can not be connected or it may be damaged.
HF-50MHz Portable Telescopic Antenna
For : 3.5 / 7 / 10 / 14 / 18 / 21 / 24 / 28 / 50
MHz
Handling and operation precautions
!
Base Coil
with connector
Product configuration
3.5 MHz expansion coil
connection & Telescopic
element shortest
HFJ-350M
M-P (PL-259)
Connector
3.5MHz
Expansion coil
Telescopic
Element
Thank you for purchasing our products.
For your safety :
Read this manual carefully for proper handling and operation before using.
Keep this manual in a safe place for future reference.
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Specifications
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Antenna type : 1/4 λ base loading type antenna
Frequency : 3.5 / 7 / 10 / 14 / 18/ 21 / 24 / 28 / 50 MHz 9-Bands
Max.Input Power : 75W (SSB) [3.5MHz] , 100W (SSB) [7 - 50MHz]
Impedance : 50Ω
Length : Min. 370mm , Max. 1665mm
Weight : approx. 260g (included 3.5MHz expansion coil)
Antenna Connector : M-P (PL-259)
● When installing or removing the antenna or adjusting the element, be careful not to open your
eyes at the end of the rod.
● Do not touch the antenna during and immediately after transmission. The fever can cause burns.
● Tighten the fixing screws firmly so that there are no accidents.
● When extending the rod, always keep in mind that there are no obstacles in the height direction.
● Do not use it outdoors when it is wet, as it is not waterproof.
● Do not use when the surface is wet, and use completely dry.
◆
To use this product, capacitive coupling with grounding or counterpoise is required.
Note that if the ground capacitance is insufficient, the VSWR characteristics will deteriorate,
especially in the low frequency band, and there is a high possibility that adjustment will not be
possible.
◆
On the structure shortened by the loading coil, the tuning band is narrow. If you want to check
where the tuning frequency is, we recommend using an antenna analyzer such as CAA-500Mark II.
