After my success in getting more current into the aerial yesterday I decided to measure the RF current in the link (link coupled ATU) with a proper RF ammeter. I was somewhat surprised that the curre
Hello Richard, is you antenna matched to 50 Ohm ? If you just bring it to resonance (loading coild adjustment) the antenna impedance can be anything between 10 and 100 Ohm. And some 10m's length of c
Dear Richard, LF Group, It is not generally the case that the output impedance of a PA is equal to its design load impedance, and so maximum power delivered to load is not the same thing as load impe
Hello Jim, LF, indeed, class D amplifiers will (within reasonable limits) "adapt" to the load impedance. At least as long as the load is resistive. I have noticed that my PA (G3YXM design clone) reac
is you antenna matched to 50 Ohm ? Not sure but the optimum power transfer suggests that it is matched to the output impedance of the transmitter. If you just bring it to resonance (loading coild adj
Dear all, according to my experience radio transmitters with good efficiency and meeting all relevant data are usually designed for a load (!) of 50 ohms only, nothing else. But this does not mean th
Richard . This bit may of been missed ////// Any ideas? ////// Incidentally, am I best to measure current in the link or in the aerail ////// wire? The ammeter 'has' to be at the point of feed to the
