On 15/04/2018 08:22, Dave W wrote:
On 15/04/2018 00:43, Fredxx wrote:
On 15/04/2018 00:19, Dave W wrote:
"Dave Plowman (News)" wrote in message
...
Need some replacement reservoir caps for a power amp. Nothing special -
just 10,000uF at 63v. RS have them from about 4 quid to about 50.

Old amp so not PCB mounted - just wires to them and plenty space so not
restricted to an identical part - which isn't made now anyway.

Best make to go for? Is a 50 quid one really worth it?

If you apply the RS product filters to select max temperature of 85C and
reject screw terminals, you are left with only three choices: £4.13,
£4.28
and £6.15, all equally suitable.

Did you mean to say "reject max temperature of 85C"?

Otherwise there are some for as little as £2.40

I thought this was for resale, so a 85C would be suitable, otherwise I
would generally go for 105C if any semblance of reliability is required.

No I meant reject 105C as I see no necessity for it. I don't believe
that 85C capacitors from a reputable make lack "any semblance of
reliability".

The £2.40 ones are for bulk buys.

I didn't spot some were bulk buys. I can't see an option, like DigiKey,
where you can specify the required number.

I tend to design equipment that has a long life expectancy and have only
ever been caught out in the Japanese capacitor fiasco a couple of
decades ago. As a result I would choose a 105C capacitor and one with
long hours of endurance.

If a capacitor is worked hard in a warm enclosure, I would prefer the
cap to last longer than 3 months of usage as per the ones you suggest.
Raising the operating temperature to 105C, using rules of thumb, should
mean it would last 4 times longer given the same endurance hours.