G'day folks,
I migrated to Australia from Germany in 1974. I used to own a Schaub Lorenz T60 Transistor Radio in the 60s. For nostalgic reasons I purchased the same radio on German eBay. Quite expensive because of the shipping. It was advertised as fully functional. But it is not. All I get is very weak and distorted volume. I traced it down to the two AD155 final stage Amp transistors. Short between emitter and collector, measured desoldered. I'm actually a retired carpenter tinkering in old analog gear - especially organs. I know a "little" about electronics. I suspect that unsuitable or defective gear was connected to the audio out. There are a few expensive AD 155 transistors on eBay, but there are also some cheaper Russian substitutes offered (GT403E or 1T403E). There is also the issue of matched pairs! I think the Germans call it "Gegentakt Endstufe". But I'm only guessing here. Please enlighten me.
Thank You
I migrated to Australia from Germany in 1974. I used to own a Schaub Lorenz T60 Transistor Radio in the 60s. For nostalgic reasons I purchased the same radio on German eBay. Quite expensive because of the shipping. It was advertised as fully functional. But it is not. All I get is very weak and distorted volume. I traced it down to the two AD155 final stage Amp transistors. Short between emitter and collector, measured desoldered. I'm actually a retired carpenter tinkering in old analog gear - especially organs. I know a "little" about electronics. I suspect that unsuitable or defective gear was connected to the audio out. There are a few expensive AD 155 transistors on eBay, but there are also some cheaper Russian substitutes offered (GT403E or 1T403E). There is also the issue of matched pairs! I think the Germans call it "Gegentakt Endstufe". But I'm only guessing here. Please enlighten me.
Thank You