Super caps...

[Boscoe]

Just having a look at some on Farnell, you can get a 5.5V 1F cap for just less than £5, it's just 21mm diameter and 8mm tall, 16 of them in series would make a good PSU for 40V rails and 125,000uF per rail. A single 120,000uF 50V cap is £250 odd and massive. It sounds good to me but do they need controlled charging and can they handle the large currents required in an amp that uses 125mF in it's PSU?

 

[DF96]

What is the ripple current rating? I suspect this may be a memory-retention cap, meant to supply microamps.

 

[AndrewT]

16off 1F caps in series = 62.5mF
3off 22mF 50Vcaps in parallel give about the same and cost ~£8, nowhere near £250

Series caps need some form of voltage equalising.

edit:
just realised you meant 8caps in series.
Still nonsense.

 

[jitter]

Just having a look at some on Farnell, you can get a 5.5V 1F cap for just less than £5, it's just 21mm diameter and 8mm tall, 16 of them in series would make a good PSU for 40V rails and 125,000uF per rail. A single 120,000uF 50V cap is £250 odd and massive. It sounds good to me but do they need controlled charging and can they handle the large currents required in an amp that uses 125mF in it's PSU?

Supercaps have a high ESR and are not suitable to function as smoothing caps. As DF96 already mentioned, they are meant for very low power applications such as keeping volatile memory intact during power outages and such.

 

[Elvee]

Some flavours of supercaps have a low esr and high current capacity:
Products::Ultracapacitor Products::Kranking
Prices might differ though

 

[gorgon53]

yeah, waiting for those types that are used by the automobile industry to
arrive in the junkyards so I could put em to better use