Hi guys. I'm most definitely an amateur at this kind of thing. I have a good basic hobbyist knowledge, but that's it. I was wondering if someone could help with a few things on a project I'm working on?
Project Overview
The plan was to buy an old FM radio shell from eBay, and hook a Raspberry Pi, with mpc/mpd installed, up to the amp. Then plug a portable drive into the Pi, and use it as a jukebox. The Pi setup has gone fine, and I've just about managed to locate the right place to solder my stereo inputs from the Pi to the amp board to get the whole thing working as a standalone device.
The IC's are:
KA22471: http://pdf1.alldatasheet.com/datasheet-pdf/view/97331/SAMSUNG/KA22471.html - for the FM receiver I think
KA2201: http://pdf1.alldatasheet.com/datasheet-pdf/view/37140/SAMSUNG/KA2201.html - for the audio amp part
Questions
Image here: http://i.imgur.com/qbPTXZz.jpg
1. I've connected a stereo input to points A and B. I'm not sure if this is the right place, but it gives me audio. It's noisy, and a bit distorted. Where would be a more sensible place to hook it up?
2. The FM aerial is still connected at point C. I'd like to isolate this somehow and I think it's where the extra noise is coming from. What's the best way to kill it, as I don't want to use it?
3. What are the things at D and E?
4. When I do connect to A and B, I have limited control over volume using the volume pot I've connected it to. Any ideas why?
Thanks for any help you guys can give. If you'd like more photos, please ask!!
Project Overview
The plan was to buy an old FM radio shell from eBay, and hook a Raspberry Pi, with mpc/mpd installed, up to the amp. Then plug a portable drive into the Pi, and use it as a jukebox. The Pi setup has gone fine, and I've just about managed to locate the right place to solder my stereo inputs from the Pi to the amp board to get the whole thing working as a standalone device.
The IC's are:
KA22471: http://pdf1.alldatasheet.com/datasheet-pdf/view/97331/SAMSUNG/KA22471.html - for the FM receiver I think
KA2201: http://pdf1.alldatasheet.com/datasheet-pdf/view/37140/SAMSUNG/KA2201.html - for the audio amp part
Questions
Image here: http://i.imgur.com/qbPTXZz.jpg
1. I've connected a stereo input to points A and B. I'm not sure if this is the right place, but it gives me audio. It's noisy, and a bit distorted. Where would be a more sensible place to hook it up?
2. The FM aerial is still connected at point C. I'd like to isolate this somehow and I think it's where the extra noise is coming from. What's the best way to kill it, as I don't want to use it?
3. What are the things at D and E?
4. When I do connect to A and B, I have limited control over volume using the volume pot I've connected it to. Any ideas why?
Thanks for any help you guys can give. If you'd like more photos, please ask!!