 |
 
|
| Electrical specifications
|
|
| Operating frequency band, MHz |
2-30
|
| Impedance ratio |
|
| BR-800-1.5DR |
50:75 (1:1.5)
|
| BR-800-2.5DR |
50:112 (1:2.25)
|
| BR-800-4DR |
50:200 (1:4)
|
| BR-800-6DR |
50:300 (1:6)
|
| BR-800-9DR |
50:450 (1:9)
|
| Impedance, Ohm |
50
|
| Insertion loss, dB |
0.23-0.45
|
Input power, not more, W
(CW, SSB)* |
800
|
| Asymetrict factor no less, dB |
25
|
| Connector |
SO-239
|
| Weight, g |
750-790
|
| Length/Width/Depth, mm |
112x61x346
|
| * The antenna power capacity is defined by the duration of transmission, type of transmission, its frequency, SWR and the ambient temperature.
|
| |
Several years of baluns investigation on a polygon of "Radial" company have shown that for some types of antennas, for example Windom (BR-800-4DR) or Delta (BR-800-4DR), there is also a currents cut-off from a cable braid needed except asymmetry. Appearance of spurious resonance due to the "antenna effect" of feeder forced to install a current choke.
This idea was proved by the analysis of the German company Fritzel products having a such choke in their constructions.
The problem has been solved after the choke installation and antenna’s resonances were clearly reflected at the SWR-meter screen without any spurious splashes.
The current choke is made of fluoroplastic cable wounded over the 12 ferrite rings. The current cut-off plot is shown on the DR chart.
However, this is not the only novelty. A BBRT (broadband range transformer) is used as a transformer. The principle of its operation is based on a transmission of a current over a communication line but not over magnetic field in a core, like in the conventional transformers. Such a scheme considerably increases the throughput power and reduces losses.
Each balun passes compulsory quality control. Typical SWR charts are shown on the figures.
BR-800-2.5DR
|
DR
|
|
|
The information provided on this page is not an official offer.
To verify actual parameters contact the sales department before ordering.
|
|
