Many people win awards on the mode at 5 watts! Most transceivers will distort your waveform above a certain limit, and there's no point in risking it for another 2 or 3 dB.Īs you stated, JT-65 is a weak signal mode. So to answer the question, the standard maximum is either 20 or 30 watts - and there's really no point in exceeding that. ![]() Overdriving them can cause clipping, which will cause you to actually waste power and may even make your transmission unreadable. Transceivers are meant to work with analog data, not the sharp frequency transitions of the digital signal. That in turn means that you run the risk of interfering with a conversation that you can't even see, especially if you're running 100W and they're each at 5 or 20.įinally, many transceivers will cause distortions in the JT-65 waveform when run at above a quarter to a half of their maximum power. Note that the same is true for the WSPR family of protocols.įirst, that since everyone else is using less power than you are, you'll have many cases of people hearing you, but you can't hear them. ![]() Any more than that, and you'll start finding certain problems. That gives you a good 6dB boost (every doubling of power is equal to +3dB) which is actually meaningful in JT-65. ![]() 5 watts is probably what most JT-65 purists will tell you to use, but in practice, I tend to aim for 20 watts.
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