That is correct =50% but i was thinking more of the real value being usually double than what you need so 100% is also correct.
You could replace a single 10uF bi-polar UES for C109/C110 and one 1uF film for C111. This will get you to 11uF.
Whether it is 10uF or 11uF is just not an issue at all.
Real electrolytic capacitors in good condition will virtually never be +100%, or even more than +20%.
Such a large deviation from rated value indicates a possibly defective part which should be discarded,
or at least reformed to see if it can be salvaged.
Real electrolytic capacitors in good condition will virtually never be +100%, or even more than +20%.
Such a large deviation from rated value indicates a possibly defective part which should be discarded,
or at least reformed to see if it can be salvaged.
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Exactly. Not a critical value. 10uF are standard parts,
I assume you have not modeled this in Spice to understand what each cap does and what the effect of the value has.
In other words, someone said replacing the caps will deliver you to Nirvana? You have not read actual engineering on the cap differences? Why one may pick a 10uF electrolytic when a .5 film may do just fine? Your amp. Go for it. But there is actually reasons we go to school on this stuff.
I completely see and agree to your point and don't want to change values on anything other to where the calculations come up with a close, just not readily available value. The capacitors in question BTW are Tantalum caps.
I do tons of simulations tayloring the frequency response of MY circuits as ALL of them contain coupling capacitors.Yet i often see in simulations that having a high value coupling cap while improving the phase response at low frequencies is also increasing the distortions at high frequencies...Plus some topologies ask for the minimum amount of capacitance to have a decent start-up .Not talking right now about my usual ways to cut the frequencies below 10...20hz in phono preamps right from the input stage either...
All I'm saying is that lower value capacitors in phono preamps will never hurt too much while too big coupling ones might cost you some expensive speakers .
Looking at opinions at what to replace the input capacitor to the phonostage, at the moment its a 470uf 3.15v tantalum, but its in a quite tight position on the board, (see pic) and cannot find a direct radial replacement. I have looked at bipolar caps like the Nichicon ES but they are far to big, smaller polar electrolytic caps may fit such as Panasonic FM or solid polymer caps like the spec caps
2022-03-16_01-42-24 by chris reddish, on Flickr
2022-03-16_01-43-32 by chris reddish, on Flickr
2022-03-16_01-42-24 by chris reddish, on Flickr2022-03-16_01-43-32 by chris reddish, on Flickr