Stalker XX/President Madison PC411AD Repair

[dt307]

tr43 change that as a must its norm a 2sc458 and the most failed transistor i ever seen and makes the rx have noise when vol down or squelch up and gets worse over time .
dont see much posted about it wack in a 945 and job done

Would this problem be linked to the Petrusse Excalibur 2002 problem on another post at the moment as it has similar-sounding issues, but on a different board obviously???

sorry not seen that post in detail just browsed over it i think cybernet circuit was different but i will take a look later.

[lbcomms]

The circuit is similar, a common emitter transistor amp between the wiper of the volume control and the input to the audio power amp IC (for example, TR36 on the Cobra 140 40 channel FCC radio).

Common to go noisy, showing as a hiss on receive when no signal is present, most noticeable on AM. We usually replace them with a BC109C.

[jave72]

Anyone knows if there is another transistor that makes noisy SSB transmission without modulation?
Tanks

[KlondikeMike]

New link for the Uniden Madison v4 / Pearce Simpson Super Bengal MKIII (w/PC411AD) electrolytic capacitor kit;

https://klondikemikescapkits.com/produc ... acitor-kit