Allard,
in addition the "high side" injection must be used and chosen,
because fin = fLO - Fif; e.g. fin = 3.5 MHz Fif = 12 MHz then fLO
= 15.5 MHz.
The "low side injection" as used in the BITX40 does not work (fin
= 7 MHz, flo = 5 MHz then fif = 12 MHz).
Henning Weddig
DK5LV
Am 13.09.2018 um 00:27 schrieb Allard
PE1NWL:
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As far as the firmware is concerned, for monoband operation you
could use the latest Raduino sketch v1.28.1.
This includes the latest enhancements such as spurious prevention,
CW keyer, capacitive touch keyer, improved calibration, etc.
To modify it for 80m, just change the defines for MIN_FREQ and
MAX_FREQ at lines 36 and 37.
And set Region to 0 at line 47.
73 Allard PE1NWL
