mixer
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Internet and Radio : WebSDR- UR5WT WebSDR on 80m
- This WEBSDR runs on Raspberry PI4-8G, Afedri-Net RX for 160m, RTL-SDR stick with homemade SBL1 mixer upconverter and fullsize 160m Delta loop antenna 4m up. Operated from Ukraine by UR5WT, US5WE and UX5DH,
[ Hits: 151 | Votes: 1 | Rating: 9 ]
- Audio Mixer
- An homebrew audio mixer for the ham shack by GW6ITJ
[ Hits: 749 | Votes: 2 | Rating: 2 ]
- SDR Receiver using a Tube
- The build was an experiment to see if a tube receiver could be stable enough to receive digital shortwave radio broadcasts.
The tube acts as both an oscillator and mixer, so the receiver is a type of direct conversion receiver.
[ Hits: 230 | Votes: 1 | Rating: 10 ]
- Specan Spectrum analyzer
- The Specan is actually a very simple but robustly built receiver. it is, in essence, a double conversion superhet receiver with 112 Mhz and 12 Mhz Intermediate frequencies. The first mixer uses an Si570 as the local oscillator. The Ardiuno that controls the Specan is a very flexible microcontroller board that you can program in simple C language
[ Hits: 85 | Votes: 1 | Rating: 9 ]
- A Simple Spectrum Analyzer
- This is a swept-filter spectrum analyzer. Basically, RF and swept oscillator signals are fed to a mixer and the output of the mixer is passed through a highly selective crystal filter.
[ Hits: 119 | Votes: 0 | Rating: 0 ]
- Two Tone Generator
- A two tone generator is an essential test gear made with just four transistors that helps you evaluate your amplifiers, mixers, receivers for distortion. Distortion makes all the difference between a pleasant receiver and a horrible sounding one, between a clean transmitter and bad, splattering one on air.
[ Hits: 81 | Votes: 0 | Rating: 0 ]
- Innovative 2m to HF Converter
- Ulrich L. Rohde N1UL conceived an outstanding 2m to HF receiving converter with specific requirements, including 144-148MHz to 28-32MHz coverage, low noise, high IP3, and a unique modular design. The design decisions emphasize modularity, absence of preselection, stability, and a passive mixer, showcasing Rohde's distinctive approach.
[ Hits: 60 | Votes: 0 | Rating: 0 ]
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