1， using the original Rock Mite \'s PIC12F629 microcontroller， hand- key / auto key control ， with automatic keying callsign ， to control the transmission indicator LED and other functions， very convenient and practical.
2 ， the use of automatic key ， the microcontroller can adjust the speed and sidetone frequency code ， you can enter their own callsign ， support power-down to save.
3 ， the use of high -quality audio op amp to do the second active filter ， and its very low noise floor ， excellent amplitude-frequency characteristics greatly improved listening experience octopus . 4 ， the power upgrade to 4W (D882 output ) ， while the use of American ring kit (FT37-43 and T37-2) two each ， so that the " octopus " with more remote communication capabilities ， greatly enhance the " octopus " utility sex !
5 ， firing frequency 7.023MHz， 7.023-7.026MHz receiving frequency is adjustable ， using 2N7000 do new offset control circuit ， beat quality improvement ， improve listening effect.
The main index
Power: 12V
Receive quiescent current : 25mA @ 12V
Transmit power : 4W @ 12V
Frequency range: the vibration emission 7.023MHz， receive local oscillator 7.023-7.026MHz
Mode : CW
the suit Aluminum case size:
Circuit theory
Receiving section for typical NE602 mixer ， plus 4558 audio filtering straight becomes active receiver. 2SK30 mute circuit which is used to turn off the receiver at the time of transmission .
Emitting portion 9018 of the use of the oscillation circuit ， and then to do the buffer amplifier 8050 ， 8050 also as the transmission key ， the last stage is a class C amplifier D882 ， and then send the second order LPF followed antenna .
package:
1 pcs Accomplished PIC Super RM kit CW transceiver/Telegrap
1 pcs suit Aluminum case