My new homebrewed EFHW
3 banders : 40m 20m and 10m
Please handle with love, due to its portability, it may required a loving care!
Specifications:
EFHW
End Fed Half Wave Antenna
Tuned for 40M, 20M and 10 M Amateur Bands
(Not designed for 6M Band)
Thank you for your purchase
1. THIS IS MARKED AS:
A : STRICKLY for QRP ONLY !!!
Maximum POWER For LSB/SSB/CW/Data - 20Watts
Maximum POWER For FM – 10 Watts
2. RF coaxial CABLE:
RF coaxial cable to be used with this antenna system MUST be of 50 Ohm
It can be RG8, RG213, RG58 or any other type of RF coaxial cable of 50 Ohm
Type of coaxial cable, either RG8, RG213, RG58 will not make big difference in performance or LOSS in 40meter, 20 meter band
The length of RF coaxial Cable will not increase or decrease the level of RX or TX in this antenna system, but as rule of thumb, the shorter the better.
Please avoid any excess length of RF coaxial Cable, avoid twist and roll. Put it as straight as possible
Install in a manner that is safe
Buyer can specify:
1. Type of socket on the Auto-tuner box either SO239 or BNC
2. QRP or QRO system
TIPS
Height is important for HF antenna
The higher is the better ( higher than 10 meters from the ground) for DXing 50 – 5,000 KM (propagation dependence)
Lower is usually good for NVIS (near vertical incidence skywave nvis) (lower than 10 meters from the ground) – shorter distant communications, which is good for Search And Rescue – 20 –1000 KM (propagation dependence)
Always AVOID installing your antenna close to a power line!
Advisable to place your Auto-tuner box at a location "slightly protected" from rain. Never submerge the Auto-tuner box in water.
THIS ANTENNA SYSTEM does not require an ANTENNA TUNER.
THIS ANTENNA SYSTEM does not require grounding for performance, but it is good for protection
IF YOU NEED an EFHW antenna system for QRP (SSB/LBS/FM) less than 30 Watts. Please put up your order, the complete set is super light-weight, super small in size and fast installation in the field, esp: for Mountaineering, OFF ROAD or Search and Rescue activities
9W2CHE
2022
MADE IN TAIPING, MALAYSIA
REGARDS
Install the antenna system in any of the format above, to suit your preference or convinience or space available
Note:
In the Sloper configuration, the Auto tuning box can be place at the upper or lower position (lower works better)
The Auto Tuning Box should be placed at least 1.5 meter above the ground level.
Please do not OPEN or dismantle the Auto Tuning box, as there are no user serviceable part inside
PLEASE NOTE
due to availability of materials and the nature of production “home made” or home-brewed, there will be some changes in size, color, dimensions and look of each unit. The highest standard of RX / TX will be the same or better :)
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