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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band
PostPosted: Nov Tue 12, 2019 3:27 am 
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Joined: Aug Sat 17, 2019 8:55 pm
Posts: 31
Yeah, not a critical application, just about any NPN would work - just got to watch the pinout. The KSC1815YTA is a good choice.


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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band
PostPosted: Nov Fri 15, 2019 2:30 am 
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Location: 02911
I received my transistor today, but have discovered something interesting. According to the pinout of the C829 transistor, the pins are 1 emitter, 2 collector, and 3 base. On the stereo, the C829 was wired in with the emitter and base pins swapped. Maybe the unit was wired wrong from the factory, as C828a has a pinout where 1 is base and 3 is emitter, and the factory tech got confused. However, tr209 is also installed wrong. Would the radio ever work with this mistake, because I was told thst it did work when it was bought new. I just don't want to install the new transistor according to the schematic, and have it get ruined.

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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band
PostPosted: Nov Fri 15, 2019 2:56 am 
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Disregard. I completely goofed up. I was looking at the transistor pinot upside down. No errors in the radio except my own.

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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band *Fixed!*
PostPosted: Nov Sat 16, 2019 2:12 am 
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I completely forgot to update this thread yesterday, but after installing the replacement transistor, the Am band sprang to life! I reassembled the radio today, and will send it out to its new owner soon. Thank you everyone for all the help you have given, as I wouldn't have been able to do it without you!

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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band *Fixed!*
PostPosted: Nov Sat 16, 2019 3:22 am 
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5Y4GT wrote:
I completely forgot to update this thread yesterday, but after installing the replacement transistor, the Am band sprang to life! I reassembled the radio today, and will send it out to its new owner soon. Thank you everyone for all the help you have given, as I wouldn't have been able to do it without you!


Sweeeeeeeeeeeeeeeeeeeet!

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 Post subject: Re: Realistic STA-77 Receiver Dead AM Band
PostPosted: Nov Sat 16, 2019 4:19 am 
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Joined: Jul Tue 15, 2008 6:13 pm
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Location: Gretna, Nebraska
Good job getting it working again.

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