Now THESE are some caps...

[dood]

Got a new amp for my system. It's an Adcom GFA-545. Conservatively rated at 100wpc x 2.








The top component is the amp, of course

[dood]

Re: Now THESE are some caps...

Manufacturer of the caps is Towa? Fujitsu Towa, I believe http://www.faradnet.com/company/c0001241.htm

[kc8adu]

Re: Now THESE are some caps...

those are tiny.wait till you see the ones i work with on motor drives.
each the size of 3 pound coffee cans and in banks containing up to 100 of them.

[Wizard]

Re: Now THESE are some caps...

Crimped eyelets on solid gauge wires is big no no! Mechanical failure soon comes up because solid wires does not conform to the crimp readily. They are designed for stranded wires only.

Best design is busbars and screws for capacitors, can be rebuilt to this configuration.
By the way, note the star grounding system. That's excellent.

Cheers, Wizard

[kc8adu]

Re: Now THESE are some caps...

wonder if the mfr was smart enough to solder the crimps too.

[Krankshaft]

Re: Now THESE are some caps...

Is there any real reason why manufacturers use torroid transformers on amps?

Do they have better characteristics than iron core transformers?

[Topcat]

Re: Now THESE are some caps...

those are tiny.wait till you see the ones i work with on motor drives.
each the size of 3 pound coffee cans and in banks containing up to 100 of them.

Pics or ban!!

[kc8adu]

Re: Now THESE are some caps...

Pics or ban!!

i will take some pics next time i am onsite there.
next time will be the first severe thunderstorm outbreak of spring.
they get nailed several times a year.

[dood]

Re: Now THESE are some caps...

Is there any real reason why manufacturers use torroid transformers on amps?

Do they have better characteristics than iron core transformers?

As far as I know, they just tend to be quieter, and higher output than iron core.

From Wiki, I found this - The magnetic flux in a toroid is largely confined to the core, preventing its energy from being absorbed by nearby objects, making toroidal cores essentially self-shielding.

[Logistics]

Re: Now THESE are some caps...

Insane! How many microfarads are those each? I read on a site that a typical rule-of-thumb for stiffening vs. wattage is .5F per 500W, which is the same as 1000uF per 1W, correct?

Is there any real reason why manufacturers use torroid transformers on amps?

Do they have better characteristics than iron core transformers?

This article explains why, at least the author feels, they are better: http://www.tnt-audio.com/clinica/ssps1_e.html

[Per Hansson]

Re: Now THESE are some caps...

Hehe yea, those are awsome kc8adu
A local sawmill company uses such caps to increase their PFC factor
If it falls below a certain value they get a hefty price increase
They got replaced pretty got damn quickly when one of their power bills was suddenly $5000 higher than it usually is!
Turns out the bank had failed, nice of the power company not to inform them too!

[glen65]

Re: Now THESE are some caps...

Now THESE are some caps..

So are these

[Wizard]

Re: Now THESE are some caps...

Now we are talking about THOSE. This was commonly found in vintage computers that filled racks as well. And there were some in early 70's computer boxens.

Cheers, Wizard