4O3A Signature

4O3A designs and manufactures high-quality accessories and TCP/IP controlled solutions for your shack. Our flagship Genius line of products are designed specifically to eliminate station complexity, reduces cost and improve operator efficiency. Created by world-class contesters and engineered for reliability, they can push your contest scores higher.

Our new PowerGenius XL RF linear amplifier is exceptionally clean, quiet and delivers full legal-limit power at 100% duty cycles. The only fully SO2R-capable amplifier it has 70dB nominal isolation between exciter inputs. Like our entire Genius product lineup, it is monitored and automated through an integral Ethernet connection.

Linear Amplifier Power Genius XL

The PowerGenius XL is a 100% ICAS duty cycle, legal limit (1500W ICAS) 1.8-54 MHz RF amplifier. Designed with a pair of the latest NXP MRF1K50H LDMOS transistors that are each capable of 1.5 kW and run up to 2000W easily, providing plenty of headroom for lowest IMD and spurious output.

Factory price: CALL US!

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Tuner Genius

Integrates with any transceiver
Designed to complement FLEX-6000 series transceivers and the Power Genius XL™ amplifier
Samless SmartSDR™ software integration
Complete control and monitoring (over LAN) from an intuitive Windows™ application
Contest ready - the ONLY single-radio SO2R solution in amateur radio
High accuracy SWR and power meter measures in bypass mode.... and much more.

Factory price: CALL US!

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Antenna Genius 8x2+ V2

Antenna Genius is a smart antenna switch that features 8 antennas to 2 radios. Perfect for SO2R and multi-op contesting or making the most of your dual RX transceiver.

LAN/WAN capability was a core design capability from day one and not an afterthought. The entire Genius product line: Interface Genius, Antenna Genius, Rotator Genius and Station Genius all work together seamlessly both locally and remotely.

Factory price: 899 EUR

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My antenna genius is operating perfectly at -28°C (-17.6°F) right now. Industrial temp rated components as it operated flawlessly during the latest cold snap here in Minnesota.

There was frost on the inside of the enclosure which actually made conditions more rugged because I installed an external relay switch to change feeds on 20-15-10 M from my 4L SteppIR to a tribander for close in Caribbean and SA contacts during the CQWWCDW DX contest as a temporary measure, but left it in place during the cold weather.

Thanks for a great product!

With the 4O3A filters our station to station and site to site interaction was negligible across 83,300+ QSOs. We ran 6 stations 24/7 and I don’t recall ever seeing a station not manned. The only time anything was heard was on the exact harmonic and just tuning 5 kHz off that frequency to set the split allowed operation to continue with no impact.

It is indeed a good feeling when you transmit on one band and can listen even to the weakest signals on the other band, without getting annoyed by interference.

4O3A products have completely revolutionized contesting at ES5TV/ES9C station over the last 10+ years and none of the results would have have been possible without them. Triplexers, Quadplexers multiply the antennas and towers. Band Pass Filters take care of all the cross band interference. Station Genius network has eliminated a ton of control boxes and wires taking all the relay control into LAN every antenna and every switch being accessible from any operating position. So has Rotator Genius solved the issue of ops running around the shack looking for rotator controllers. Not only is everything at the station fully automated with Ranko’s LAN based products, but when accompanied with Flex Radio, Antenna Genius antenna switches and Power Genius XL amplifier all the station is remotely controllable as if I was sitting in the shack! And on top of it all, webcam allows me to see how my extremely heavy duty 70 meter high rotating tower produced by 4O3A carrying 8x5 element H Frame stack on 15 meters is enjoying the golden sunset in the forest.