Thanks for the post Damon.
It was just some cheap polypropylene one's i found to see if it really does anything (like people say), if it doesn't, i won't be venturing into this whole charade any longer.
Finally understand a lot more now thanks to you.
This was why i went on replacing polyester caps with polypropylene, hoping it would improve.
I've seen so many multilayer ceramic capacitor with values like 0.01uF, 0.1uF, and 0.1uF be used as a bypass cap for the high frequency. I could understand that its good for power supply decoupling since they have low impedance over 1Mhz, but i've found some right next to the audio signal in my Schiit Mjolnir headphone amplifier (code 104, 104K, 105, 105Z) and wondered if film would be better suited in this case as it also tackles high frequencies but with a better dielectric.
Some of these caps, for example the 105Z has a tolerance of +80% and -20%.
Is there a reason for the cap to contain more capacitance like that? Is it for more capacity to fill?
It was just some cheap polypropylene one's i found to see if it really does anything (like people say), if it doesn't, i won't be venturing into this whole charade any longer.
Finally understand a lot more now thanks to you.
This was why i went on replacing polyester caps with polypropylene, hoping it would improve.
I've seen so many multilayer ceramic capacitor with values like 0.01uF, 0.1uF, and 0.1uF be used as a bypass cap for the high frequency. I could understand that its good for power supply decoupling since they have low impedance over 1Mhz, but i've found some right next to the audio signal in my Schiit Mjolnir headphone amplifier (code 104, 104K, 105, 105Z) and wondered if film would be better suited in this case as it also tackles high frequencies but with a better dielectric.
Some of these caps, for example the 105Z has a tolerance of +80% and -20%.
Is there a reason for the cap to contain more capacitance like that? Is it for more capacity to fill?
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Decoupling caps usually don't need a close tolerance, and many types of capacitors have a very loose tolerance due to their construction. Electrolytics are particularly notorious for that for several reasons. Ideally I'd like to use film/foil for decoupling, but usually I have to go with metalized film. Ceramic caps aren't always available in the voltage I need and some types are notoriously nonlinear; not an issue for decoupling logic, but I'm not sure about audio.
If my wretched income ever improves, I'm going to research stacked foil caps.
If my wretched income ever improves, I'm going to research stacked foil caps.
MPC Series
Maybe you can prefer the MPC series metal band.
Résistance MPC74 5W 0,22 R sur le site Internet Conrad | 443877
Regards!
Maybe you can prefer the MPC series metal band.
Résistance MPC74 5W 0,22 R sur le site Internet Conrad | 443877
Regards!
Like you, i also tend to use as many film and foil as i can, but all these capacitance values are only available in metalized caps, which sucks.
It's safe to say that Film & Ceramic both works for high frequencies right? If so, from the looks of it, film seems to be the better choice due to their long load life and perhaps do better for audio decoupling since the dielectric is better.
I'll give it a try and replace some multilayer ceramics near my audio signal with some film/foil polypropylene and see if it changes the sound.
What i found:
"Multilayer ceramic (aka monolithic) are often used in digital circuits due to tiny size and excellent high frequency characteristics"
"Audio seems to favour 100nF MKTs"
"MKT type capacitors are made from metalis(z)ed (aka metal film) polyester."
Then there are some others who say use to film is bad for HF decoupling because it's ESR is too low and may cause ringing.
This is why i hate circuitry...so many bias.
Also thank you Project, but replacement was more targeted towards a better performing resistor.
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I have stock of MPR 5W R22J
If anyone needs replacement MPR 5W R22J resistors send me a PM. I had one heck of a time finding supply and when I did there was a min-buy requirement. i have 40 pcs excess (as of 1/10/15).. Manufacturer is Noble Electronics.
Dual Emitter Resistor
5 Watt
.22 ohm x 2
If anyone needs replacement MPR 5W R22J resistors send me a PM. I had one heck of a time finding supply and when I did there was a min-buy requirement. i have 40 pcs excess (as of 1/10/15).. Manufacturer is Noble Electronics.
Dual Emitter Resistor
5 Watt
.22 ohm x 2
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