Thought I’d ask here, I’m working on a Kyrocera A-910 which is a fairly high end integrated amplifier rated at 150 watts per channel. It has many nice parts in it. On each driver board there is a 4.7 uF bipolar cap in position C523
They used a very large in physical size crossover capacitor. Which is weird as they had other non polar Elna caps of other values in the amp that were much smaller in physical size. So I’m curious why they would choose this cap for this position. The reason I say speaker crossover part is because I’ve pulled many of this exact cap from cheaper crossover when rebuilding speakers.
Initially I was just going to use a Nichicon ES Muse or Nichicons other bipolar series, but I thought I should figure out why a speaker crossover type? Would I be better off with a 4.7 uF polypropylene?
Any help on figuring out why would be greatly appreciated. Would a Nichicon ES be okay here or should I find something that would be used in a speaker crossover? Only issue is the poly would be big. Guess I could add an electrolytic to my next order.
Dan
They used a very large in physical size crossover capacitor. Which is weird as they had other non polar Elna caps of other values in the amp that were much smaller in physical size. So I’m curious why they would choose this cap for this position. The reason I say speaker crossover part is because I’ve pulled many of this exact cap from cheaper crossover when rebuilding speakers.
Initially I was just going to use a Nichicon ES Muse or Nichicons other bipolar series, but I thought I should figure out why a speaker crossover type? Would I be better off with a 4.7 uF polypropylene?
Any help on figuring out why would be greatly appreciated. Would a Nichicon ES be okay here or should I find something that would be used in a speaker crossover? Only issue is the poly would be big. Guess I could add an electrolytic to my next order.
Dan
Is it part of the feedback? Full schematics would help.
Looks like quite critical part. MP cap would not be much bigger, perhaps you could fit it there.
Looks like quite critical part. MP cap would not be much bigger, perhaps you could fit it there.
Not sure how to get the whole schematic posted, but here it is zoomed out.
Hopefully still readable. I’ll have to look through my parts to see what polys I have, they’re all probably 400v-630v rated when I only need 50v, reason I was thinking the Nichicon ES.
Dan
Hopefully still readable. I’ll have to look through my parts to see what polys I have, they’re all probably 400v-630v rated when I only need 50v, reason I was thinking the Nichicon ES.
Dan
Most definitely part of the feefback.
I do not like the way they draw lines to connectors and between the boards. When they connect multiple lines to simplify...confusing.
Looks like sofisticated design.
I do not like the way they draw lines to connectors and between the boards. When they connect multiple lines to simplify...confusing.
Looks like sofisticated design.
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Don't understand those four separately standing transistors pictured infront of power amp input stage. Are they part of feedback? Some sort of limiter?
So film seems to be the way to go on this? I guess I’m not familiar enough with this feedback circuit to wonder why a capacitor generally used in a speaker crossover would be better than a standard electrolytic. This is what I initially went with.
Otherwise my options are Eton and Audyn. Audyn being slightly bigger, I like both of these caps.
Yeah, I was curious about those four transistors myself. I can read a schematic, but when it comes to understanding the intricacies I can get lost.
Dan
Edit: It fits, but barely lol.
Otherwise my options are Eton and Audyn. Audyn being slightly bigger, I like both of these caps.
Yeah, I was curious about those four transistors myself. I can read a schematic, but when it comes to understanding the intricacies I can get lost.
Dan
Edit: It fits, but barely lol.
Looks good.
It has to be bipolar, so rather then two back to back caps, they used cap often used in crossovers. Good choice.
It has to be bipolar, so rather then two back to back caps, they used cap often used in crossovers. Good choice.