Скачать или смотреть IAMBIC CW PADDLES Remote Rig Operations using a Raspberry PI - with QSK RX audio between letters

demo showing keying of iambic cw paddles in real time at the remote op's location...sending cw to the rig for transmit on HF(AFCW MODE)

APPs description and purpose.

1. zitaNJbridge(ZITA-N2J & ZITA-J2N) is used to RECEIVE audio from the RIG(over LAN ip) and to send audio for transmit TO THE RIG
2. A 5555 hz tone is used to activate the RIG's vox circuit to turn ON the RIGs PTT before the CW tone arrives at the RIG's LINE INPUT(k3s)
3. both the 680 hz CW TONE and the 5555 hz PTT TONE are bandpass filtered to virtually eliminate all harmonics above the below the 2 pitches(note the 5555 hz tone is rejected(too high)by the rig's internal BRICK WALL transmit Low Pass Filter
4. TEENSY usb midi board is used the RECRI MidiKey embed software..which provides both IAMBIC and STRAIGHT KEY pins for hooking up the paddles and the straight key
5. the RECRI KEYER apps provide the timing necessary to provide the correct timing and delays
6. the DUCKA appS block the RX audio while the local sidetone is playing
7. the AMS app provides 10 db of AGC and "brick wall limits" the output to -6 db
8. the TEENSY USB MIDI BOARD uses midi note 2 for the straight key and the MIDI TRANSPOSE apps transposes note 2 to note ZERO so that the AD5DZ keyer can be keyed with the Straight key...the AD5DZ STRAIGHT KEY debouncer works well to keep bounces out of the mix when using the ST KEY
9. the CALF band-reject FILTER gets rid of the return 5555 hz tone from the RIGs audio input transmit monitor

NOTE:
an upgrade with this remote rig iambic keying station setup is having two DUCKA apps and their delay apps... to provide lower latency local sidetone monitoring and more RX QSK AUDIO between letters...the performance of zitaNJbridge's AUDIO OVER IP APP is amazing and it is very low latency...24 bit uncompressed HI FI 2 way full duplex audio