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Sigma mute mod For the large fader, fit an n4148 diode at DX (marked with a red circle). For the small fader, fit a latching switch at SW26 (blue rectangle) and link pins 1 & 2 at PL2 (blue rectangle). RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库