Hi all!
I've been trying to build a K-502 amp kit off and on for the past 3 years (found it difficult to get time to make the case). I think it's finally nearing completion, which means it's time to share and get feedback.
I hope people don't mind me uploading the photos on a 3rd party site, but it's easier for me to send the link to friends. (if it's an issue, I can re-upload them here)
Build photos from the last few days can be found here.
I'm slowly getting the PCB wired up to the inputs, outputs, switches etc, but I was going over the circuit diagram (which someone else has very kindly uploaded here) and I noticed that the input transformer steps the 115V AC up to 250V AC. As I'm building this in the UK, and our mains voltage is 240V AC, I was wondering if I could remove this transformer entirely, and possibly add a small step down transformer for the 12V rails (which I can't figure out what they're used for...)
On a marginally different point, I have one of these switches, which it says is rated up to 24V, and I have a relay (can't remember exactly which, will update later when I dig it out) I assume I can run this off the 12V, once I figure out where I'm getting it from. I'm pretty sure I know how this works, but just to stop me blowing stuff up, or electrocuting myself, does anyone have a circuit they would suggest (I also have a tiny 240V AC->5V DC adaptor I ripped out of a USB charger which I can use to drive the LED...)
Anyway, thoughts? Suggestions? As this is my first build, I'm not expecting amazing sound quality (although it would be nice!) so I don't think I want to replace any components at this stage... maybe on my next build... or if this one doesn't turn out so good...
I've been trying to build a K-502 amp kit off and on for the past 3 years (found it difficult to get time to make the case). I think it's finally nearing completion, which means it's time to share and get feedback.
I hope people don't mind me uploading the photos on a 3rd party site, but it's easier for me to send the link to friends. (if it's an issue, I can re-upload them here)
Build photos from the last few days can be found here.
I'm slowly getting the PCB wired up to the inputs, outputs, switches etc, but I was going over the circuit diagram (which someone else has very kindly uploaded here) and I noticed that the input transformer steps the 115V AC up to 250V AC. As I'm building this in the UK, and our mains voltage is 240V AC, I was wondering if I could remove this transformer entirely, and possibly add a small step down transformer for the 12V rails (which I can't figure out what they're used for...)
On a marginally different point, I have one of these switches, which it says is rated up to 24V, and I have a relay (can't remember exactly which, will update later when I dig it out) I assume I can run this off the 12V, once I figure out where I'm getting it from. I'm pretty sure I know how this works, but just to stop me blowing stuff up, or electrocuting myself, does anyone have a circuit they would suggest (I also have a tiny 240V AC->5V DC adaptor I ripped out of a USB charger which I can use to drive the LED...)
Anyway, thoughts? Suggestions? As this is my first build, I'm not expecting amazing sound quality (although it would be nice!) so I don't think I want to replace any components at this stage... maybe on my next build... or if this one doesn't turn out so good...