Electrolytic capacitors with hi ripple current
- Thread starter thekid777
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Accelerator
Well-known member
@thekid777
It will be very helpful for us to answering correctly back to you, if you -First of all- tell us what kind of amplifier is this that you need these radial standard 85° capacitors which are made today that can match the high ripple current of capacitors made 30-40 years ago?...
So let’s say is this amplifier a Hiwatt DR103 100w guitar amplifier and you need a 100 + 100 / 500 Volt Dual Value Radial Caps with Solder Lugs like this one F+T 100uF x 100uF, 500V dual electrolytic caspacitor?...
Ok, but i hope you're also aware that the expected lifetime doubles for every 10C under the rated temperature.
1000h @ 105C -> 2000h @ 95C -> 4000h @ 85C etc
So insisting on 85C caps is... hard to justify. Especially since even the cost differences are minimal.
Do you happen to have some financial interest in promoting all those esoteric capacitors?
Electrolytic capacitor technology has pretty much improved in all aspects over the decades.
Max ripple current is usually specified in cap data sheets. You can also extrapolate reduced internal heating from lower ESR.
JR
Max ripple current is usually specified in cap data sheets. You can also extrapolate reduced internal heating from lower ESR.
JR
soapfoot
Well-known member
Right—if anyone has some empirical data showing that older capacitors were more tolerant of ripple current, I’d be very curious to see it!
Accelerator
Well-known member
Nope, just like the “Lucky Luke” I am still “a poor and lonely” DIY-er who ruined his pockets back in time, making my Marshall JMP 1959 100w Plexi clone, so I know very well "the pain for his pocket" that someone DIY-er Guitar amp. builder has, especially if you multiply the price of the F+T 100uF x 100uF, 500V Dual Value Radial Electrolytic Caps with Solder Lugs, five times for his guitar amp…Do you happen to have some financial interest in promoting all those esoteric capacitors?
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sahib
Well-known member
Capacitance? Operating Voltage?
For example, Sprague Powerlytic 36DY series, 10,000uF 100V with a ripple current of 14.5A.
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