Reversible BOG Antenna Matching Set
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Two-direction Beverage On Ground (BOG) feed-point transformer and termination transformer set, for antennas made of coax cable. Available for both 50 or 75 ohm feed line systems.
83.82 $
The reversible BOG Antenna is an inexpensive low profile, but very effective receiving antenna used by amateur radio, shortwave listening, and longwave radio DXers and military applications.
BOG antennas should be shorter than the classic Beverage antenna, lengths between 50 to 60 meter generally works well.
Low Band System’s beverage and BOG feed systems use an isolated winding, matching transformer system to significantly increase the signal-to-noise ratio. This transformer works with BOG antennas that normally have 200 Ohm impedance. The termination resistor is a 4 watt, non-inductive resistor that withstands nearby lightning strikes and high RF levels from near-by transmitters.
Our line of Beverage and BOG Systems offer great flexibility in building high performance Beverage receive antennas systems for DXing and contesting. Use several Beverage or BOG antennas to cover all important directions and use an LBS RX antenna switch to conveniently chose the best one for each contact.
- Broad operating range, 0.5 to 30 MHz
- Fully isolated grounds prevent common-made noise
- Coax (antenna line) impedance: 50 or 75 ohm
- Antenna impedance over the ground: 200 ohm
- Feedline impedance: 50 or 75 ohm
- UHF (50 ohm) or F connector (75 ohm)
Based on 2 reviews
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Kevin VA3RCA –
I am a rank beginner at this. This is my first attempt at any kind of low noise receive antenna. I have deployed 200 feet (61 meters) of pre-fab buriable RG-6 coax in an East/West orientation and fed it with twin RG-6 line. I have only a 4 foot ground rod installed at each end. Performance is pretty amazing on the AM Broadcast band, and on the 160m band. As I have it installed, it still delivers value on the 80m band but at lower signal levels. I find that on certain frequencies the directional performance is pretty spectacular, less so on other frequencies. I suspect this is a function of how I have it installed.
On many frequencies within the AM broadcast band I can choose from two different stations depending on which direction I choose. I am very pleased with this product and have ordered a second set of transformers to run North-South.
I am building a receive preamp to help match the level with that of other antennas. The preamplifier designed by W7IUV seems very well thought out. You can find a PDF describing his work on the internet. VE6WZ created an excellent video on YouTube describing his build of the W7IUV preamp and comments below the video link to the W7IUV PDF, a KiCad circuit board layout with which you can get boards made, and a bill of materials.
If you have suggestions regarding my deployment, or questions feel free to look me up on QRZ!
Kevin VA3RCA –
Björn SM0MDG –
Using this reversible BOG matching set with 50 meter of pre-fabricated low cost RG6 as the antenna line and three 5 meter radials on the ground in each end.
It serves as my South/North switchable RX antenna for 160m Topband and complements my N/W and N/E Pennants well for that occasional weak signal from South.
The output is around 10 dB over the pennants, so I installed a 10 dB attenuator on the feed lines to have the same signal level when switching between the antennas.
Björn SM0MDG –