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Calculated influence of metal mast passing through element plane on super low noise Yagi Antenna PA432-26-7BGP with G/T 9dB Original question: What is the real effect of a metal support mast going through the element plane of a 432 MHz long yagi? I…
Calculated needed distances for Economical Stack of Four PA1296-36-3BUT and Two PA144-432-19-3-2CB for EME. With Yaesu G-5500 Azimuth Elevation Rotator Systems. All Metal Pipes. Original question: I would like to get into EME (moon bounce), I do have limited space so 5-6 metre long booms are…
Possibilities of stacking four 2 meter Yagi antennas around the 23cm dish. Discussion started on Moon-net “Moon-net@mailman.pe1itr.com” Questions: I have somewhat of a logistics nightmare at my QTH. I’ve moved my 2.3 meter dish with septum feed for 23 cm…
Cheap QRO Relay 50 – 144 MHz with high isolation and “N” connectors Intended to switch antenna to QRO or preamplifier without need for another isolation relay. This N Connectors High Power Relay is good enough to protect any sensitive…
Cheap QRO Relay 50 / 144 MHz with high isolation Intended to switch antenna to QRO or preamplifier without need for another isolation relay. This cheap QRO relay is good enough to protect any sensitive preamplifier. Relay is good for…
Symmetrical High Power 50-144MHz Relay Intended to switch two equal antennas to QRO. Possible use is as H / V switch. Although relay will be perfect to switch antenna to QRO and preamplifier. Intention of High Power 50-144MHz Relay is…
Capacitor self resonant frequency SRF popular for amateur use We used 0805 and 1206 SMD capacitors, film capacitors and electrolytic capacitors with wire + VIA length about 2 to 4mm Capacitor self resonant frequency testing: 680pF 0805 Series Resonant Frequency…
Inductor self resonant frequency SRF We measured Series Resonant Frequency “SRF” of some axial, SMD and hand wind inductors. The self resonant frequency of an inductor is the frequency at which the parasitic capacitance of the inductor resonates with the…
