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radios:dr-m06th [2026/02/13 23:16] – [SDR Tap] g5rktradios:dr-m06th [2026/02/13 23:17] (current) – [Modifying an Alinco DR-M06TH 6m transciever for packet usage] g5rkt
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 Mods: Mods:
-- Inputs for TX audio, pre/deemphasis and direct modulator inputs +- Inputs for TX audio, pre/deemphasis and direct modulator inputs\\ 
-- Ouptuts for RX audio, pre and post filter +- Ouptuts for RX audio, pre and post filter\\ 
-- 6 pin mini-DIN connector on the rear +- 6 pin mini-DIN connector on the rear\\ 
-- Selectable "1200/9600" audio output +- Selectable "1200/9600" audio output\\ 
-- 2nd IF filter replacement (6KHz -> 3KHz) +- 2nd IF filter replacement (6KHz -> 3KHz)\\ 
-- Second receiver SDR tap+- Second receiver SDR tap\\
  
  
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 =====Filter replacement===== =====Filter replacement=====
-The radio is set up to receive +-5KHz FM voice, but on packet we're using +-2.5KHz FM voice. I replaced the second IF filter (CFW455F, -6dB BW +-6KHz, -40dB BW +-12.5KHz) with a tighter filter (CFW455H, -6dB BW +-3KHz, -40dB BW +-9KHz).+The radio is set up to receive +-5KHz FM voice, but on packet we're using +-2.5KHz deviation. I replaced the second IF filter (CFW455F, -6dB BW +-6KHz, -40dB BW +-12.5KHz) with a tighter filter (CFW455H, -6dB BW +-3KHz, -40dB BW +-9KHz).
  
 =====SDR Tap===== =====SDR Tap=====
radios/dr-m06th.1771024561.txt.gz · Last modified: by g5rkt