Have 9 large 44000 MFD 100 VDC Caps - Any ideas/circuts for them?

[Ken Maltby]

I was thinking of a line conditioner or maybe some sort
of power storage. Perhaps in a mini solar system?

Printed on them:

Mallory
Made in U.S.A.
44000 MFD 100 VDC
POS + 85C
MAX SURGE 125 VDC
CGS443T100X8L3PH
362 8934 56699

Any project books or application design sheets, ideas?

TIA;
Ken

 

[Dave VanHorn]

I was thinking of a line conditioner or maybe some sort
of power storage. Perhaps in a mini solar system?

Each cap will store about 440 joules, of which probably 200 would be
useable. (WAG)
1J = 1 watt for 1 second

For reference, a palm sized NIMH battery will store almost 60,000 useable
joules.

 

[N. Thornton]

44000 MFD 100 VDC

Any project books or application design sheets, ideas?

Hi Ken, it sounds more like something that should be lined up on a
shelf - an eyeful, but of what use?

They'd probably work in the supply reservoir of a 100kW audio amp
based on transmitter triodes - not that that's any use.


Regards, NT

 

[Winfield Hill]

N. Thornton wrote...

Ken Maltby...


Hi Ken, it sounds more like something that should be lined
up on a shelf - an eyeful, but of what use?

I have some big caps like that lined up on a shelf.

They'd probably work in the supply reservoir of a 100kW
audio amp based on transmitter triodes - not that that's
any use.

Nah, nothing so exotic as that. Two of them can serve as the
storage capacitors in a +/-85V power supply for a 400W vehicle
audio amp. At full output (8-ohm load, 10A peak, 3.5A average)
they'll sag 10V in 125ms. If he uses four caps in parallel for
each supply rail, they'll hold up for 0.5 sec. This means his
amp can deliver a full 400W for a short time without having to
take 400W (i.e. ~ 30A) from the car battery. This way his auto
amp can use a simple 100W dc-dc converter, yet deliver 400W for
short bursts of time. He can locate the caps in the trunk.

Thanks,
- Win

whill_at_picovolt-dot-com

 

[Paul Burridge]

I was thinking of a line conditioner or maybe some sort
of power storage.

How about a low-ripple, 9V/500mA power supply?
;-)

 

[Ken Maltby]

Hi Ken, it sounds more like something that should be lined up on a
shelf - an eyeful, but of what use?

They would look good, with their light blue shiny shrink wrap
covering and the two polished terminals twinkling on top. The
only thing is I might mistake one for a "Pringles" can in the dark.

 

[Ken Maltby]

N. Thornton wrote...

I have some big caps like that lined up on a shelf.


Nah, nothing so exotic as that. Two of them can serve as the
storage capacitors in a +/-85V power supply for a 400W vehicle
audio amp. At full output (8-ohm load, 10A peak, 3.5A average)
they'll sag 10V in 125ms. If he uses four caps in parallel for
each supply rail, they'll hold up for 0.5 sec. This means his
amp can deliver a full 400W for a short time without having to
take 400W (i.e. ~ 30A) from the car battery. This way his auto
amp can use a simple 100W dc-dc converter, yet deliver 400W for
short bursts of time. He can locate the caps in the trunk.

Thanks,
- Win

whill_at_picovolt-dot-com

Hmm....might be good for short expletives while driving.
Maybe with an alarm circuit, to scare away dogs (ultrasound?),
maybe low freq. high energy pulses?

Some rusted old gears starting to turn, more ideas, more pls...

Ken

 

[Ken Maltby]

How about a low-ripple, 9V/500mA power supply?
;-)

Winston Churchill

Sounds good, I could put a couple of straps around 4 of them
and make the rest of the power supply fit under a nice alarm
clock display. (Might even paint the caps a dull orange.)

Is that Homeland Security knocking on my door?

Back to the drawing board;
Ken

 

[John Woodgate]

I read in sci.electronics.design that Winfield Hill
about 'Have 9 large 44000 MFD 100 VDC Caps - Any ideas/circuts for
them?', on Sat, 22 Nov 2003:

He can locate the caps in the trunk.

Just as long as he doesn't locate the vehicle outside the Hill
residence. (;-)

 

[Winfield Hill]

John Woodgate wrote...

Winfield wrote...


Just as long as he doesn't locate the vehicle outside
the Hill residence. (;-)

Good point!

Thanks,
- Win

whill_at_picovolt-dot-com

 

[N. Thornton]

They would look good, with their light blue shiny shrink wrap
covering and the two polished terminals twinkling on top. The
only thing is I might mistake one for a "Pringles" can in the dark.

Just hope someone doesnt charge them up before the shelf is cleaned

Regards, NT

 

[Kevin McMurtrie]

N. Thornton wrote...

I have some big caps like that lined up on a shelf.


Nah, nothing so exotic as that. Two of them can serve as the
storage capacitors in a +/-85V power supply for a 400W vehicle
audio amp. At full output (8-ohm load, 10A peak, 3.5A average)
they'll sag 10V in 125ms. If he uses four caps in parallel for
each supply rail, they'll hold up for 0.5 sec. This means his
amp can deliver a full 400W for a short time without having to
take 400W (i.e. ~ 30A) from the car battery. This way his auto
amp can use a simple 100W dc-dc converter, yet deliver 400W for
short bursts of time. He can locate the caps in the trunk.

Thanks,
- Win

whill_at_picovolt-dot-com

Car audio speakers are usually 4 or 2 Ohms so +/- 85V is too high for a
Class AB amp. Besides, car audio systems usually don't have much
capacitor storage since they're taking in DC.

Those caps are perfect for a home amplifier system, which typically do
need lots of capacitor storage.

 

[Rich Grise]

Or a Mongo general-purpose bench supply.

 

[Rich Grise]

Now that you mention it, that's about the size that this one
client used in a aircraft power supply for light planes.
28V at about 40 or 50 amps - enough to run a whole airplane's
avionics, and a 100 amp model if you want to run the landing
gear. It used a ferroresonant transformer, which did all the
regulating it needed; essentially the same kind he used in his
line of battery chargers. You don't use a capacitor on a battery
charger. ;-)

Cheers!
Rich