RF Concepts (Alpha) has a major update on the 4040 Tuner Project

RF Concepts (Alpha) has a major update on the 4040 Tuner Project:






In the last 45 days, we’ve made a lot of progress on the Alpha 4040 DreamTuner. As you know, when we tested the tuner under full power, we discovered that the switches weren’t delivering the performance we needed. Dissatisfied with the test results, and knowing it would push the delivery out, we undertook a massive redesign including a new, commercial pad cap, custom antenna switches, and a new layout. The fruit of our labors is a very efficient tuner that is an industry leader in both matching range and power handling.

We ARE shipping beta units this month.  Our first unit already shipped to the owner of RF Concepts, Michael Seedman, AA6DY and he was pleased with the changes and overall design of the tuner.  This is a different tuner than we showed at Dayton last May.  Here’s a picture of the insides.  We’re planning on posting a new section in the website with lots of photos and details.

Thanks for sticking with us over this insanely long period of time.  We’re almost there…

Ken N0QO
President and CEO
RF Concepts

P.S. We are accepting pre-orders. These orders are non-binding, with no deposit necessary.  Click HERE to learn more.



Whole Unit

Here’s the unit with redesigned exterior sheet metal, up and running. The Alpha 4040’s enclosure is designed to support the weight of an 80 pound plus amplifier. There are no protruding screw heads, this allows for easy stacking and placement of a whole variety of gear atop the tuner.




  • Capacitor mounts and shaft couplers redesigned to limit stray capacitance. Inductor design changed and resonance breaker added to reduce stay inductance.
  • Coupler design changed to improve overall Vector Network Analyzer performance.
  • Antenna and bypass switch changed to handle the voltage and current they will be subject to at high VSWR. Another benefit of the new switch design is that the bypass VSWR, even at 6m, is excellent. This design will also allow you to combine two of the antenna ports.
  • Capacitors were moved towards the back to decrease stay inductance and reduce overall length.
  • The new design allows for easier assembly and repair along with a much lower weight.
  • New mounting of stepper motors designed to simplify sheet metal and improve electrical shielding.
  • Computer upgraded to newer higher performance 1GHz model. All software was ported to utilize the new PC.
  • Printed circuit board assemblies were changed to fit into new metal design.
  • The reduction in minimum capacitance and inductance has dramatically improved the matching range of the tuner, especially at higher frequencies.



Back Panel

  • The back panel redesign was driven by the new switch design. It accommodates Bird type QC connectors. If the A4040 is used to transform high SWR at high power different connectors will be required, e.g. 7/16 DIN. You can easily destroy SO239, PL259 connectors with the voltages that could be present at the connector location with this tuner.
  • The repositioned LAN port allows for convenient wired connectivity. The Alpha 4040 is fully network enabled for remote control and online software updates.



Front Panel

  • Front panel display has been moved to the left to allow for reducing the overall length.
  • Bezel depth decreased to facilitate greater viewing angles.
  • Tuning knob moved down to facilitate length reduction.

Check out the RF Concepts Website at http://www.rfconcepts.com/ for further details!



3 thoughts on “RF Concepts (Alpha) has a major update on the 4040 Tuner Project

  1. Kevin N9JKP says:

    Has anyone heard more recent info on this tuner?

    • k9zw says:

      Alpha was sold again, presumably to the same folks who bought TenTec earlier this year.

      I do not believe there has been any 4040 updates along the way.



      • k9zw says:

        Per Al NN4ZZ:

        I recently exchanged some emails with Mike and while this isn’t an “official” update, he told me I could share this:

        The tuner is going to happen, no questions and no doubt about it. This will occur in 2017. I am fixing the issues so that when it is released it will be right and you will be satisfied with the performance. It will be trouble free just as your Prometheus DX2400 has been.

        I have one of his Prometheus amplifiers and can attest to the quality and robustness of his products so I feel sure it will be a great product when it’s ready. He is working on changes to the embedded computing platform, high precision closed loop position control system, and a 7” WXGA display.

        I’m excited to hear the good news and looking forward to getting my hands on the tuner this year.

        Regards, Al / NN4ZZ
        al (at) nn4zz (dot) com

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