Why We Started RF.Guru
We did not start with a catalogue. We started with a failed antenna, vague specifications and the conviction that RF equipment should be explainable, measurable and built for the station where it will actually work.
Frustration became a design brief
After years of antennas that bent too easily, transformers with little useful documentation and products that treated weather sealing as an afterthought, a trusted active loop failed through water ingress. That failure was not mysterious. It was the predictable result of choices that should have been engineered out.
So we began building the equipment we wanted to use ourselves: RF systems whose current paths, matching networks, protection, materials and mechanical loads could be discussed without hiding behind a label. The aim was not to invent magic. It was to remove avoidable ambiguity.
RF.Guru exists because good RF engineering should survive contact with both the measurement bench and the weather.
Engineering is a chain of evidence
A product is not finished when the schematic works. The electrical design, mechanics, protection, documentation and support must agree.
Matching, common mode, grounding and protection start with knowing where wanted and unwanted currents can flow.
Parts and simulations guide a design; the completed product, its ports and its stated test conditions establish the evidence.
Materials, sealing, strain relief, thermal paths and serviceability are RF decisions because failure changes the electrical system.
Ratings need frequency, duty cycle, load, temperature and installation context. Support should clarify those limits, not obscure them.
Products with an RF.Guru design trail
These are RF.Guru-developed product families currently represented in our shop. They cover different jobs; none is presented as a universal answer.
Active receiving systems
HF transmitting antennas
Station hardware and matching
The people behind the hardware
Joeri Van Dooren, ON6URE turns field questions, RF models and laboratory measurements into the electrical architecture and the writing behind RF.Guru.
Jonas Van Dooren develops the mechanical implementation—the structures, enclosures and details that let the electrical design survive outside.
Small by choice, accountable by design
Jonathan Van Dooren keeps sourcing, logistics and administration moving. The same compact team remains close to design decisions, assembly and customer questions.
That proximity is part of the product: an engineering question should reach someone who understands the system rather than disappear into a script.
More than a shop
The hardware pays for engineering; the writing makes the engineering inspectable. The Guru’s Incredible Lab collects the published articles so readers can follow the reasoning, challenge it and apply it—even when they never buy a product.
Mini-FAQ
- Does RF.Guru sell products from other manufacturers? — The wider shop does. The product families shown on this page are RF.Guru-developed; third-party brands are intentionally excluded from this origin story.
- Does a product name establish performance? — No. Use the product page, technical overview and stated measurement conditions for the exact model and installation.
- Where can I read the engineering behind the products? — Start in The Guru’s Incredible Lab and the product whitepapers.