Packet Radio / QRG Update :

This update does not affect anyone using 14.105 LSB with a standard old fashioned TNC.

For those operating on the USB QRG, we have recently had to alter the QRG dial frequency slightly up and compensate by moving one of the modem tone pairs down 100hz in order to put sufficient spacing between the multimode and packet channel “Blue”. Prior to this there was a small overlap causing some problems especially if the radios participating were slightly off-frequency.

Below are the new QRG details for all three bands.

20m

The 20 meter Frequency

Please note these are subject to change as we are in the process of testing viability of various new packet modes, on paper they appear to be 200Hz wide but in reality packet AFSK is actually closers to 400Hz, and BPSK / QPSK is ~450Hz. At present, AFSK 300 IL2P at 2250Hz does overlap with AFSK.FX25 at 2000Hz but it remains working for now.

40m

7.0452 USB

Lowest 1000Hz port is the legacy 40m EU/UKRAINE forwarding location with ROTW. IL2P port is the NOV location for GB7IOW Isle of White RF only station. PI8LAP (Netherlands) and EI2GYB (Ireland) are continental forward partners with UT1 Radio Club in Ukraine. Using high speed VARA, if available. They automatically relinquish and try an alternative port which is just a different audio band with choice of 2 x FX25 legacy channels and a new IL2P high speed experimental channel. We have 1 more slot spare in the 4-port QtSoundModem TNC (multiplatform)

All the robust modes have equal chance of simultaneous transfer so long as they are different for each connection, hence the robust mode slagging match at 1500Hz center frequency because neither will budge (spectrum optimisation actually).

We’ve got NinoTNCs squeaking away at 2250Hz for us- those systems using a Nino use a different dial frequency yet remain 100% compatible with the existing network of packet. Having packets interrupting an established P2P session with the robust modes is a big frowny.

The 20 meter Frequency

Please note these are subject to change as we are in the process of testing viability of various new packet modes, on paper they appear to be 200Hz wide but in reality packet AFSK is actually closers to 400Hz, and BPSK / QPSK is ~450Hz. At present, AFSK 300 IL2P at 2250Hz does overlap with AFSK.FX25 at 2000Hz but it remains working for now.

10m

Do you spot a pattern? 28.1371 USB