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This is a discussion forum of China Amateur Radios. 这是一个中国业余无线电爱好者的论坛.
新手培训班. 对于业余无线电的新手，如果您有问题要提问，请到到这里，有专家回答，本版严禁灌水！
Feb 14, 2016 · This is a discussion forum of China Amateur Radios. 这是一个中国业余无线电爱好者的论坛.
Feb 6, 2016 · This is a discussion forum of China Amateur Radios. 这是一个中国业余无线电爱好者的论坛. IC-7300
psk31 is a new amateur radio teletype mode invented by amateur radio enthusiasts like peter martinez g3plx. like traditional rtty, it is a kind of keyboard to keyboard communication (chat). the baudrate used is 31.25 baud, fast enough to handle most operators manual typing capabilities. it is not suitable for transporting computer data like pictures or programs, but intended as a mean of human ...
Aug 23, 2013 · A 27 kΩ resistor cuts off the cathode current when the amplifier is stand by. There is still about 300-500 μA idle current, eventually mount more than 27 kΩ for minimum current.
新手培训班. 对于业余无线电的新手，如果您有问题要提问，请到到这里，有专家回答，本版严禁灌水！
May 10, 2017 · This is the source code of the MMDVM firmware that supports D-Star, DMR, System Fusion and P25 modes. It runs on the Arduino Due, the ST-Micro STM32F407-DISCO and STM32F446-NUCLEO, as well as the Teensy 3.1/3.2/3.5/3.6.
Nov 22, 2022 · This is a discussion forum of China Amateur Radios. 这是一个中国业余无线电爱好者的论坛.
Aug 9, 2007 · ft-450at receiver circuit analysis and simplified block diagram ft-450at receiver circuit analysis and simplified block diagram vs describes this radio as a real dx receiver! "the 67.899 mhz 4-pole roofing filter (mcf) and 8 band-pass filters at the rf stage provide excellent suppression of out-of-band interference". the receiver is dual conversion; the 1st if is 67.899 mhz. the 24 khz 2nd if ...
