Introducing Vibroplex , our new distributor for USA and Canada!

KNOXVILLE, TN. January 23, 2017 – Vibroplex LLC, Knoxville, TN, USA and SKY SAT d.o.o. of Igalo, Montenegro are pleased to announce an exclusive agreement for Vibroplex to distribute the 4O3A Signature product line in the United States and Canada.
The 4O3A Signature line consists of TCP/IP and LAN enabled radio accessory equipment including the advanced rotator control devices, radio interface devices for serious radio contest operation, remote and locally control antenna switches, station controllers, antenna controllers, combiners, triplexers, 4.5 kW HF bandpass filters, and more. Many new products are slated for 2017 release.

Sky Sat CEO Ranko Boca, 4O3A, stated, “I know Scott Robbins from our long mutual passion for radio contesting and have developed great respect for the business acumen he’s demonstrated growing the Vibroplex business. 2017 will be a great year for the 4O3A Signature line and I’m thrilled with our new American representation.”

About Vibroplex LLC:

Vibroplex is the oldest continuously operating business in Amateur Radio, in their 112th year. In addition to manufacturing Morse Code keys under the Vibroplex and Bencher brands, they own International Radio (“INRAD”), manufacturer of aftermarket crystal and roofing filters and who presently is the supplier of OEM filters for Elecraft, and W7FG Vintage Manuals. In addition, they currently distribute products for German radio companies Spiderbeam GmbH and Easy-Rotor-Control and Chinese manufacturer YouKits on an exclusive basis in the United States.


Scott E. Robbins
1001 N Broadway St
Knoxville, TN 37917 USA

Orlando Hamcation 2017


See you in Orlando!

We’re attending the Orlando HamCation 2017 from 10th ro 12th Feb this year. You can meet our CEO Ranko Boca 4O3A and R&D engineer Nikola Mitić YU1XDX on the FlexRadio booth.
FlexRadio will officialy present the Power Genius XL amplifier in a live enviorment. The amplifier will be fully operational in an SO2R configuration.
FlexRadio is the official and exclusive distributor for Power Genius XL.

An interview with 4O3A in the URE magazine


An interview with 4O3A was published in the famous Spanish URE magazine.
You can see the entire article here:

Interface Genius: New hardware version ready!


We finally launched the 2.0 hardware version of Interface Genius!

Most modifications were made in the audio circuit. We now have improved and excellent audio both locally and over the network.

We now accept orders for the new Interface Genius unit which is surely the most powerful keyer/SO2R box/modem on the market today.

Antenna Genius 3.03 update is out!

A new version of the Antenna Genius app has been released.

Download Version 3.0.3 here or visit our support page .

Notice: There is no firmware update required with this release. The required firmware is 3.0.0.


1. Device discovery redesigned. There is no need to add static entries for local devices anymore, they’re detected automatically.
You can still add static entries for remote connections in a separate tab.

2. When used with FlexRadio, antenna ports are not longer bound to fixed slices.
They are now bound to antenna ports on the FlexRadio instead.