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qro.cz

qro.cz

My love for electronic started in my childhood, with a metal nail in a wall socket and the discovery of AC current :) First steps and soldering with soldering iron, old tube radios and first "baby" walkie talkie. The discovery of the CB band and later 11m SSB operation, where it was possible to work DC with the whole world at that time. Thanks to local amateur radio operators I got on the HF, VHF and UHF bands. Thought the local radio club OK2KFK and contest station OL2R, I made my way to OL7M and building a large M/M contest QTH. The need for more complex controls, switching, RX antennas and other equipment led to many products on RemoteQTH.com web. Later, I started making other products in my company under the QRO.cz brand.

Now we are dedicated not only to the production for radio amateurs, but also to custom development and production in the field of RF. The next steps are also towards remote control via the Internet, IoT and other modern technologies.

Common-mode current choke 1-PORT Common-mode current choke 1-PORT Common-mode current choke 1-PORT
Bestseller

Common-mode current choke 1-PORT

67.76 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
Common-mode current choke 2-PORT Common-mode current choke 2-PORT Common-mode current choke 2-PORT

Common-mode current choke 2-PORT

95.59 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
Common-mode current choke 3-PORT Common-mode current choke 3-PORT Common-mode current choke 3-PORT

Common-mode current choke 3-PORT

127.05 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
2-way splitter box KIT 2-way splitter box KIT 2-way splitter box KIT

2-way splitter box KIT

48.40 € (tax incl.)
The splitter or combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads.
Bias Tee BOX DC KIT Bias Tee BOX DC KIT Bias Tee BOX DC KIT

Bias Tee BOX DC KIT

43.56 € (tax incl.)
A bias tee is used to insert DC power into an HF signal to power remote antenna amplifiers or other devices.
2-way small splitter in BOX KIT 2-way small splitter in BOX KIT 2-way small splitter in BOX KIT

2-way small splitter in BOX KIT

38.72 € (tax incl.)
The splitter or combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads.
Common-mode current choke 3-PORT KIT Common-mode current choke 3-PORT KIT Common-mode current choke 3-PORT KIT

Common-mode current choke 3-PORT KIT

85.91 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
Common-mode current choke 1-PORT KIT Common-mode current choke 1-PORT KIT Common-mode current choke 1-PORT KIT

Common-mode current choke 1-PORT KIT

43.56 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
Common-mode current choke 2-PORT KIT Common-mode current choke 2-PORT KIT Common-mode current choke 2-PORT KIT

Common-mode current choke 2-PORT KIT

65.34 € (tax incl.)
Common mode choke coils work as a simple wire against differential mode current (signal), while they work as an inductor against common mode current (noise).
Bias Tee BOX AC/DC KIT Bias Tee BOX AC/DC KIT Bias Tee BOX AC/DC KIT

Bias Tee BOX AC/DC KIT

43.56 € (tax incl.)
A bias tee is used to insert AC or DC power into an HF signal to power remote antenna preamplifiers (DC), Bi-directional beverages (AC) or other devices.
Single wire beverage CLASSIC KIT Single wire beverage CLASSIC KIT Single wire beverage CLASSIC KIT

Single wire beverage CLASSIC KIT

56.87 € (tax incl.)
Beverage antennas provide one of the least expensive and most reliable ways to improve DX capabilities on the low frequencies.
Single wire beverage on ground KIT Single wire beverage on ground KIT Single wire beverage on ground KIT

Single wire beverage on ground KIT

56.87 € (tax incl.)
Beverage antennas provide one of the least expensive and most reliable ways to improve DX capabilities on the low frequencies.
3-way small splitter in BOX KIT 3-way small splitter in BOX KIT 3-way small splitter in BOX KIT
Bestseller

3-way small splitter in BOX KIT

33.88 € (tax incl.)
The splitter or combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads.
RX small preamp with 2SC5551 in BOX KIT RX small preamp with 2SC5551 in BOX KIT RX small preamp with 2SC5551 in BOX KIT

RX small preamp with 2SC5551 in BOX KIT

49.61 € (tax incl.)
The RX small preamp is very simply low noise preamplifier module with 2SC5551 transistor based on W7IUV design. Use it as high IP preamplifier for RX antennas, buffer amplifier or small driver.
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