greenhorn
Well-Known Member
Finally got a nice analog tuner (my last purchase - also a kenwood was a bust as it had some issues, and needs to be serviced)
Bought it from a gentleman who wanted to sell it to someone who would appreciate it, and not to a broker. So was lucky that he didn't sell to anyone else.
When i got it, the FM stereo light wouldn't work. Was poking around to fix it and blew the main pass transistor in the power supply, and killed it. Was worried i had killed the FM decoder chip. thankfully it was just the power supply.
Had to go to ritchie to get a replacement 2SC1384. After that was replaced, it started working again, but still no FM stereo light. after doing a bit of research on the HA 1156 IC, tried cleaning the preset pot that sets the VCO at 19KHz. That did the trick & got a strong light
connected the 19khz calibration output to my stereo and measured the sound using an android app to set the correct frequency.
I have never had much luck with a tuner - their circuits always confused me. now at least I feel confident about FM stages
and some pics to go with the story
Bought it from a gentleman who wanted to sell it to someone who would appreciate it, and not to a broker. So was lucky that he didn't sell to anyone else.
When i got it, the FM stereo light wouldn't work. Was poking around to fix it and blew the main pass transistor in the power supply, and killed it. Was worried i had killed the FM decoder chip. thankfully it was just the power supply.
Had to go to ritchie to get a replacement 2SC1384. After that was replaced, it started working again, but still no FM stereo light. after doing a bit of research on the HA 1156 IC, tried cleaning the preset pot that sets the VCO at 19KHz. That did the trick & got a strong light
connected the 19khz calibration output to my stereo and measured the sound using an android app to set the correct frequency.
I have never had much luck with a tuner - their circuits always confused me. now at least I feel confident about FM stages
and some pics to go with the story
Get it off the turntable right now!!
