[Mobile-Portable] Big Farad versus Hybrid Caps?

[Jim Miller KG0KP]

Can a 120v 30A circuit breaker be used as a 30A breaker in "12V" operation?
73, Jim

----- Original Message ----- 
From: <N1KHB at aol.com>
To: <mobile-portable at mailman.qth.net>
Sent: Friday, June 19, 2009 5:44 AM
Subject: Re: [Mobile-Portable] Big Farad versus Hybrid Caps?


> Hi Doc,
>   It would be wise and prudent to check the amplifier specs for  operating
> voltage range. With that level of current draw, the battery  voltage may
> well sag under load to less than what the amp wants in order to  operate
> properly and an extra outboard capacitor probably won't help  enough.
>   Another (better IMHO) approach would be to use a battery  voltage boost
> device. I assume that some are made in that current range.
>   Are you trying to avoid using a power supply because of cost,  or are
> you just trying to be independent of AC mains?
>
> Joe N1KHB
>
>
>
>
> In a message dated 6/18/2009 7:36:40 P.M. Eastern Daylight Time,
> doc at kd4e.com writes:
>
> Ignoring  the hype and the prices - can someone address the
> difference
> in  technology between a big Farad cap and a  Hybrid?
>
> http://www.hifisoundconnection.com/Shop/Control/fp/tcat/28044/SFV/30046
>
> Something  like this "Power Acoustik CAPCELL-300" (300A x 2
> seconds)
> placed  in-line with the vehicle DC supply, or at home
> in-line with a  big
> deep-cycle battery or a AC-DC power supply, sounds like a
> cost-effective
> and compact way to make sure a solid state amp has all  the
> current it needs
> when it needs it.
>
> At home my plan is a US  Battery 12V XC Sweeper-Scrubber
> deep-cycle
> (Amp Hours @ 20hr. rate  155min./75A for 77A continuous) with
> a 20A
> float charger.  If I  add a big Farad or Hybrid it seems that
> I should be fine
> for normal SSB  operation of a 700W output solid state amp.
> that usually
> wants about  60A @ 13.8VDC.
>
> WDYT?
>
> -- 
>
> Thanks! & 73, doc,  KD4E
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