The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Ive gone through the audio circuitry including the dynamic pot, power is signicantly differant, lsb wil mod about8-9 with an ahhhhhh, where as without any other changes except the mode to usb, usb mod about 25...20w meter tight to the end. Realisticly after the osc. the circuit for usb and lsb are t...

Radio Make and Model: cobra 139 xlr PCB Number: PC-176AA PLL Number: UPD858 Test gear available: freq counter ,multi meter, test meter ( pwr, mod, swr), iron etc. Symptoms: first prob is 2 diff pwr levels on ssb, usb modulates 12-15 w but lsb will only swing on a whistle , reg mod only pruduces abou...