The “Splinter” QRPp Receiver / Transmitter
Objavljeno: 12 Apr 2012, 11:32Aprilska ameriška številka CQ Amateur Radio magazina je posvečena QRP delu. V njej je objavljen tudi zanimiv članek o klubskem projektu izdelave QRPp postaje "The “Splinter” QRPp Receiver / Transmitter". Če koga mogoče zanima izdelava te "igrače" je link do KIT kompleta z dodatnim opisom, načrtom in informacijami: http://breadboardradio.com/breadboardra ... ducts.html.
The “Splinter” QRPp Receiver / Transmitter
Direct Conversion Receiver:
1.tunes about 100KHz (user selectable in 40 meter band)
2.bandpass filter with antenna attenuator
3.SA612AN mixer/oscillator
4.two stage audio amp with RC filtering
5.drives stereo earphones (plenty of audio)
6.receives cw and ssb
Crystal Controlled Transmitter:
1.2N3904 oscillator with SPOT button
2.2N2219A final (450-500 milliwatts at 12vdc)
3.clean output (harmonics down -45db)
4.two position crystal switch (7030KHz soldered in with sipp socket for extra crystals)
5.sidetone oscillator
6.built-in key and external key jack
7.VXO (about 3KHz)
73, Miloš S57D
The “Splinter” QRPp Receiver / Transmitter
Direct Conversion Receiver:
1.tunes about 100KHz (user selectable in 40 meter band)
2.bandpass filter with antenna attenuator
3.SA612AN mixer/oscillator
4.two stage audio amp with RC filtering
5.drives stereo earphones (plenty of audio)
6.receives cw and ssb
Crystal Controlled Transmitter:
1.2N3904 oscillator with SPOT button
2.2N2219A final (450-500 milliwatts at 12vdc)
3.clean output (harmonics down -45db)
4.two position crystal switch (7030KHz soldered in with sipp socket for extra crystals)
5.sidetone oscillator
6.built-in key and external key jack
7.VXO (about 3KHz)
73, Miloš S57D