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Wow, thanks everyone for the great reports on the lttle Yaesu transceiver! I am contemplating it mainly for its ears. I wanted to order the optional Collins 300 cycle filter for CW work, but had hazy memories from 55 years ago that such filters tended to cause unwanted "ringing" of the output audio, kinda like a steady loud output "hiss". When I left Ham Radio in 1955, the QRPp experts were playing with "active filters" for low power QRP work. If I remember correctly, such filters would block _all_ the signal, noise and everything, then open up a 30 cycle "window" for a brief while when the "start" of a dot or dash was liable to occur. The entire mess, transmitter and distant receiver was sync'd with the WWV time signal, to open and close the receiver's active filters during automatic CW transmission. The incoming dot or dash audio would be re-generated artificially by a separate audio circuit in the receiver. QRP advocates claimed they could get on a crowded voice band, and pump a low power CW signal through at a slow speed of a few words-per-minute. Switching Gears - ********* Does anyone know if the FCC still requires at least 50 RF watts to legally drive a linear amplifier? There was talk that they might change that requirement so that low power rigs like the Yaesu could drive an amplifier. Of course, nothing to stop a ham from building his own intermediate amplifier, but cleaning up all the harmonics is a major concern. Mark |
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