Early radio receivers worked on a principle called Tuned Radio frequency (TRF), patented in 1916. They weren’t very easy to use, requiring each stage to be tuned to the same frequency (until ganged ...
(click thumbnail)Clockwise from upper left are the Grundig Classic 960, Grundig Satellit 800 Millennium, Sun-Mate Info-Mate, Grundig Mini World 100 PE, Sangean ATS-505 and Panasonic RF2200.Despite all ...
Relatively few Americans are aware of it, but the United States is home to many commercial/religious international broadcasters that transmit programming worldwide using analog shortwave radio ...
After getting his hands on this relic [Gregory Charvat] manage to hack it, converting the receiver into a transceiver. It may be old, but the R-390A is nothing to scoff at. It’s abilities include AM, ...
From the receiving side of the circuit, the antenna was made of random wire coupled with the inductor L1 having a single turn while inductor L2 has 4 turns wound around a 35 mm film container. Both ...
AUSTIN, Texas & DONGGUAN, China--(BUSINESS WIRE)--Silicon Laboratories Inc. (NASDAQ: SLAB), a leader in high-performance, analog-intensive mixed-signal ICs, today announced that it is providing its ...
This is a Preselector for SW receivers (diy hf preselector) circuit. The entry low capacitance of MOSFET modern, with two gates, will create negative inverse reaction through a uncoupled source ...
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