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KD0CQ has recently been experimenting with trying to receive signals at frequencies of up to 4.5 GHz with an RTL-SDR and downconverter. Since a typical R820T/2 RTL-SDR’s maximum frequency limit is about 1.7 GHz, an external downconverter circuit is required.
A downconverter converts high frequencies down into the range receivable by the RTL-SDR. For example a downconverter with a 2.4 GHz local oscillator would convert a 3.5 GHz signal down to 1.1 GHz, which can be easily received by an RTL-SDR….MORE
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“Noise is the constant companion of the stealth antenna warrior. And as the 160m season heats up this winter, the noise level of the house with the attic 160m dipole was a serious limitation to doing any real work on that band. I had... Read more
![9 year old KM4IPF in CQ WPX SSB 2016 [ Video ]](https://qrznow.com/wp-content/uploads/2016/04/km4ipf-90x60.jpg)
![ARRL: Locating Power Line Noise with Mike Gruber, W1MG [ Video ]](https://qrznow.com/wp-content/uploads/2017/04/noise-90x60.jpg)
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