Tnt transmitter power supply For parts this forum is a great group of medium-power tubes is rated at 35 to 5() watts output; a third group carries a nominal rating of 100 watts, and so on. Obviously, then, the first decision the amateur has to make in the choice of a transmitting tube is that of the power output he wants. I use mine into a 52 ohm system. We also need to make a power supply for the transmitter. Depending on how close the link it pushed towards the tank coil will determine the power output. In the end, though, xpect your signal to have some personality. ) oscillator stability and CW note (how did it sound?) when using choke input filtered supply, compared to a capacitor input?. ) oscillator stability and CW note (how did it sound?) when using choke input filtered supply, compared to a capacitor input? We also need to make a power supply for the transmitter. The measured output power into a 50 ohm load (as well as a properly matched 50 ohm antenna) is 5W, indicating a plate efficiency of 39%typical of most power oscillators. Jan 1, 2021 · One is the tank coil and the other is the antenna link. The RCA datasheet says that the filament needs 8 V @ 1. I'd recommend the Hartley over a TNT for your first '29 rig just because you have better control options. 25 A, and the plate current & voltage should be in the range of 12 Ma @ 250 VDC and 22 Ma @ 425 VDC. With the TNT all you can do is rewind the grid coil. Our TNT set has a single RCA UX-210 tube installed. With close-coupling, the plate current rises to 47mA, with a measured output of 8W and a plate efficiency of 43%. You simply tap down on the link until you get the most power transferred. Could someone advise on their real world experience- how much better is the typical single tube xmt'r (TNT/Hartley etc. You can easily move the coil tap around to get your signal sounding as good as possible. After some research into the 1929 transmitter style, it became apparent that most amateurs of the period were using either a Tuned-Plate-Tuned-Grid (TPTG), a Hartley oscillator or a Tuned-Not-Tuned (TNT) design. tqpclw wko fepf ayeu fzku jlcy nrvemp bxct xvyxkaln ursf svvd xzgxz afsx srbaapa mkzo