Eep386 wrote:I suppose I should explain why I recommended what I did. My bias regarding cap recommendations is toward long life (> 3000 Hr) c […]
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PCBONEZ wrote:There are some errors in that assessment of replacement caps equivalents but I think I'll wait and see if the OP plans to recap anything before I write all that (again....)
I suppose I should explain why I recommended what I did. My bias regarding cap recommendations is toward long life (> 3000 Hr) caps. As a habit and with money and specs permitting, I try to use long-life caps whenever and wherever possible.
Though, if you must be a stickler for paper specs (which may be dubious coming from Fuhjyyu anyway), then I suppose we'd use Rubycon PX for the TN (Fuhjyyu quotes 810 mArms figure for 2200uF 6.3v 10x25, while PX quotes 775 mArms in a shorter 10x16 size; the 10v version gives 860 mArms in the same can), and Rubycon YXG for TM (which are very close spec wise, except that YXG is in a very slightly taller can at 10x23 vs. 10x20 for the TM). Or just use YXG for everything.
Admittedly YXF may be a bit too big (the same values give 1300 mArms ripple but in a wider 12.5x20 can) or fall a little short spec wise in some cases. KZE are overkill perhaps for TM, but personally I like that kind of overkill. As always compare datasheets before making a final decision.
I know you're well intentioned and you clearly know more than most people but you still have a few things confused.
For example you said "YXG has lower ESR than YXF, ZLH" - Well, ZLH's ESR is a full 2 tiers better (lower ESR) than YXG.
You also put HE and PW together. Those are close only in 8mm sizes. The 10mm and 12.5mm specs are quite different.
Thus the PW are bottom tier and HE are one better.
When you put all the 'good cap' specs in to a spreadsheet (8mm + 10mm + 12.5mm) based on can sizes the Grades (Tiers) become clearly defined.
Most of them 'cluster' in certain ESR/Ripple ranges making equivalents easy to see. Those clusters are what I'm calling tiers or grades.
[Have to come back to all that later.]
Rubycon PX are not low ESR caps and should not even enter the conversation.
15+ years ago Chris (aka TC) over at badcaps.net started stocking them because he was being Rubycon-centric (wanted to carry only Rubycon) and PX filled a gap in Rubycon's Low ESR product lineup. He chose a Rubycon brand GP cap to fill the hole.
Primarily it was about a 10mm 3300uF needed for PSUs when a 12.5mm won't fit. The PX was a last resort for that impossible to find size for those with "Rubycon Fever"..
Because BCN carried them people got the wrong idea (thought they were better than they are) and that has been perpetuated every since.
PX are simply not Low ESR and since 15 years ago alternatives to using PX that actually are Low ESR have become available.
Fuhjyyu TN are not Low ESR - But should be where they are used.
Any Low ESR cap will do for those. PW & FC are easy to find and will work nicely in most cases.
LXZ are good for some of the small ones.
Fuhjyyu TM (with their erratic datasheet) are about 2nd tier which makes them equivalent to FK(10&12.5mm) , KY, HE, YXG, YXH
Upgrading to 3rd tier ( FK(8mm), ZL, HD, GK, KZE, WX, NRSG) is not a bad idea to replace the TM if for no other reason than Fuhjyyu datasheets aren't trusted.
The Lifetime aka Load Life aka Endurance (and like 5 other names) rating is not useful unless you are an Engineer.
It's not what people think it is. - It's not about Life-SPAN at all. - It tells you nothing about how long a cap will last.
Do you really think quality caps only last 2000, 3000 or even 9000 hours? A year is 8760 hours.
[More later maybe.]
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GRUMPY OLD FART - On Hiatus, sort'a
Mann-Made Global Warming. - We should be more concerned about the Intellectual Climate.
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.