RF filters
Bandpass and low-pass filters and multi-band sets for field, contest and multi-op stations. Standard HF bands or your own range.
RF FILTERS · ANTENNAS · CUSTOM RF
Engineered for the field. Built toward the sky.
Kosmova designs, builds and measures RF filters, antennas and custom radio-frequency hardware. Every unit is individually tested and comes with its own measured results.
Need something custom? Request a quote →Why Kosmova
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01
Measured, not estimated
Every Kosmova filter is measured on our vector network analyzer, and you get the results for your unit, matched to its own serial number.
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02
Ratings we've tested
Power ratings are proven with long key-down runs at full rated power, so the number on the label is one we've watched it handle.
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03
Built and backed in Texas
We design, build and support everything ourselves, here in Texas. Questions come straight to the people who made your gear.
What we build
Antennas
Portable and fixed-station antennas, designed on the bench with a VNA and proven in the field.
Custom RF work
One-off antennas, filters and matching networks to your spec. Tell us the band, power and connectors.
Request a quote →LIMITED RELEASE
LC Vertical
A packable, ground-mounted quarter-wave vertical for portable operating. Drive the stake, roll out the radials, clip the coil tap for your band, and get on the air.
Built in small batches. Join the list to hear when the next batch is ready.
- BANDS
- 40 m – 6 m via tapped loading coil
- RADIATOR
- 5.6 m telescoping stainless whip
- MOUNT
- Stainless ground stake, 3/8-24 base
- COUNTERPOISE
- Ten 10 ft radials included
MEET US
See us at the Greater Houston HamFest
Kosmova will be at the Greater Houston HamFest in March 2027. Stop by to see the gear in person and look over the measured results.
Get a reminder before the show