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OC3-ADJ 75ohms 5.0Vpp 3-Channel Adjustable Frequency Standard OCXO 10K-150M High Quality RF Accessory
$134.75
OC3-ADJ 75ohms 3.3Vpp 3-Channel Adjustable Frequency Standard OCXO 10K-150M High Quality RF Accessory
$134.75
OC3-ADJ 50ohms 5.0Vpp 3-Channel Adjustable Frequency Standard OCXO 10K-150M High Quality RF Accessory
$134.75
4B100W End-feed Short Wave Antenna 4 Bands 7/14/21/28MHz Simultaneous Resonance without Day Adjustment
Specification:
Antenna length: 20m/65.6ft
Antenna model: 4B100W (4 bands withstand 100W power)
Output power: ssb mode 100W (PEP), FT8,AM.CW.SFK mode below 60W
Antenna Installation:
End-feed antenna installation requirements are very low, it is required to work more than 2 meters away from the ground, but to achieve the desired effect, it should be as high as possible and as far as possible. When the antenna is less than 2 meters away from the ground or close to other objects, the resonance point will be slightly higher. When the antenna is erected vertically, it is connected far away because of the low elevation angle, which is equivalent to an omnidirectional antenna. When it is erected horizontally, it is relatively close to the connection because of the high elevation angle, and it also has a certain directionality.
Antenna Adjustment:
The antenna has been adjusted at the factory. If the feeder and the installation environment may affect the resonance point, please test the standing wave (resonance point) when you install the antenna. If the feeder or the installation environment may affect the resonance point, then take 7.05MHz as the reference resonance point (namely the lowest standing wave frequency point). This antenna uses the principle that the 4 bands are multiples to realize the principle that one vibrator resonates at four frequency points at the same time, so the resonance points of its four bands are linked. Assuming that the resonance point is 7.05M, the other bands are about 14.250, 21.350, 29.00. If you want to change the frequency of the resonance point, just change the length of the vibrator (the length of the antenna vibrator can be adjusted), no trimming. Or adjust according to the frequency you usually use, no trimming.
Package List:
-1 x 64:1 End-feed Balun
-1 x Storage Bag
-1 x 2.5 Square 20m Vibrator
-1 x 20m Rope
