LNA – Protecting Sensitive Components


Sensitive low noise amplifiers (LNAs) in radar or radio receivers cannot tolerate large input signals without sustaining damage. What’s the solution? Receiver-protector limiter (RPL) circuits, the “heart” of which typically comprises PIN diodes, can be utilized to protect sensitive components from large input signals without adversely affecting small-signal operation. RPL circuits do not require external control signals. These circuits comprise…

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hamradio 2020 Friedrichshafen

Many varied topics relating to amateur radio, operating and broadcasting technology, as well as honors, talk groups and interviews will be presented on the Internet by the DARC under the title „HAM RADIOnline“ from June 26 to 29, 2020.The Software Defined Radio Academy team and the video crew „Fascination Amateurfunk“ are in charge.The HAM RADIOnline program sees itself as a…

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Microwave EME on Wiki


Sam G4DDK and John G4BAO published a page on Wiki about EME on the higher bands. The article is full of very useful and interesting information. From Introduction od article: Above the amateur radio 144MHz band low sky noise means EME takes on a different character. Low sky noise (noise temperature) means that very weak signals can be heard against…

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50 MHz & Up Group – Web Pages with archive

Mike Lavelle K6ML 50 Mhz & Up Group

On 50 MHz & Up Group web pages is possible to find a lot of very interesting microwave articles: A hybrid SDR made from the mcHF UI board and the HackRF front end, Gary, K6MG, May 2020 Millimeter Wave Path Selection and Propagation Prediction, Mike, K6ML, April 2020 New World Distance Record on 122GHz, Mike, K6ML, April 2020 Low noise…

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RF Signal Generator up to 6GHz

rf signal generator

From Josh Johnson comes a very interesting project of RF Signal Generator which is useable up to 6GHz. RF Signal Generator is capable of sweeping between 23.5 MHz and 6GHz, with -35 to +15 dBm of output power (-25 to +10 guaranteed). More info about RF Signal Generator and of other interesting projects you can find od Josh webpages. Photo:…

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New IARU VHF – UHF – µWave Newsletter

IARU VHF UHF µWave Newsletter

Here is available for download a new IARU R1 VHF – UHF – µWave newsletter, 86th editions. The newsletter contains the next articles: IARU-R1 25th General Conference 2020 IARU_R1 contests and Multi-operator categories in 2020 IARU-R1 ATV Contest Award ceremony 2020 IAC – Italian Activity Contest Youth contesting program (YCP) 50 MHz Spectrum Access 50 MHz Innovation & Planning 23cm Band…

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24 GHz EME Transverter by DB6NT


An excellent description of 24 GHz EME setup from Michael DB6NT. Originally on German, but here is Google translated on English. Compilation of technical information about my 24 GHz EME Transverter.Since I had tried in vain for a few years, for my 120 watt TWT TH3864C. To get power supply, I decided to walk the way with a modified RW1127…

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