Capacitor Replacement Advice

[Julianhull51]

Morning friends,

I need a little help. What would be a suitable modern replacement for this capacitor. “A47M” and can you help identify the type, I.e is it a film or Mylar? The parts list says it should be a ceramic??

Any help appreciated. Thanks, Jools

 

[NickKUK]

Given it’s 20% tolerance (M) i suspect any ceramic or film cap depending on the circuit purpose. 474 = 0.47uF.
My first instinct would he to check the purpose but a similar performance film cap would do.

 

[NareshBrd]

Ceramic will take more volts than film?
May or not be an issue.

 

[NickKUK]

Ceramic will take more volts than film?
May or not be an issue.

50V (although that doesnt indicate the AC or DC voltage).

The symetric nature looks like a phono preamp stage.

 

[gip111]

Ceramic will take more volts than film?
May or not be an issue.

Most caps will say the voltage right on it. You can go higher but not too much.

 

[dreamth]

You mean 474M which is 470nF. Unless they are defective I wouldn't change them.They were quite high quality film caps.No microphonics...good tanF...

 

[NareshBrd]

Dusty, might do well with a clean and reflow job.

 

[kodabmx]

This would be a close modern replacement - much smaller size but why do you want to change them in the first place?
https://www.digikey.ca/en/products/detail/nichicon/QYX1H474JTP/2117764

 

[Julianhull51]

You mean 474M which is 470nF. Unless they are defective I wouldn't change them.They were quite high quality film caps.No microphonics...good tanF...

My instinct is to keep them, I’m changing the electrolytics and perhaps a couple of transistors if there on the problem child list as part of a renovation. Cheers for this, I was mainly trying to identify a replacement construction wise

 

[Julianhull51]

Thanks for all of your input guys, always nice to get some expert feedback 👍👍

 

[Julianhull51]

50V (although that doesnt indicate the AC or DC voltage).

The symetric nature looks like a phono preamp stage.

Correct, yes it is indeed a phono stage

 

[huggygood]

marantz ?

 

[Julianhull51]

Hi everyone and yes, Marantz, sorry been away with Covid !!! Terrible week 😷

 

[basreflex]

don`t forget to change the orange top tantalum bead cap C901, C902, they are always trouble

 

[Julianhull51]

Hi everyone and yes, Marantz, sorry been away with Covid !!! Terrible week

don`t forget to change the orange top tantalum bead cap C901, C902, they are always trouble

hi, thanks for this, I would of overlooked these in all honesty, do you have any suggestions on a preferred replacement?

 

[basreflex]

the schematic would help a lot determining it´s value

 

[Julianhull51]

Manual says 1uf 25v electrolytic, I had a couple of muse 50v 1uf bipolar, so I’ve fitted those

the service manual and schematic has a few contradictions so I’ve got capacitor anxiety 😟

 

[huggygood]

I would say Marantz 1060