[NLRS] Sealed lead acid (Gel Cell) battery source in the Twin Cities area

[Baker, Donn B]

The automotive audio "nuts" have them.  Jacobson (?) makes one that handles
400w.  The audio people want/use them for the same reason we do... linearity
in the 200w + sub-woofers.  Only they're doing it to shake your teeth two
cars over while waiting at traffic lights!  The cost is prohibitive
(personal opinion):  I looked at one 3-4 years ago; 400w for $600.

73 Donn
WA2VOI/0

> -----Original Message-----
> From: mike@KB0OZN.com [mailto:mike@KB0OZN.com]
> Sent: 09 April 2002 13:19
> To: Baker, Donn B
> Subject: Re: [NLRS] Sealed lead acid (Gel Cell) battery source in the
> Twin Cities area
> 
> 
> I agree with 13.8 being a good voltage to work with.  I have 2 30 aH 
> batteries at home that are charged at 13.8-14.0 volts almost 
> always but 
> if I transmit with 100 watts for more than about 30 sec the voltage 
> drops off and so does the power.
> I have heard of using a switching boost regulator to take in 
> any voltage 
> from 11-14 and converting it to 13.8 regulated but I haven't 
> found the 
> circuit yet, anybody know where to find one?
> Good luck
> Mike
> KB0OZN
> 
> 
> > 
> > You need to really think over the idea of not charging on 
> the road.  Most
> > radios, while "rated" at 12 vDC, actually want to see 13.8 
> vDC.  Some DEMAND
> > 13.8 v.  My FT-736 operates OK at 12.9 v (reduced TX 
> output), but WILL NOT
> > operate at 12.5 v.  It goes into a shutdown mode if the 
> input voltage even
> > SPIKES below the 12.6 v DC level (which it will on TX 
> start-up).  Remember
> > that lead-acid batteries are normally 12.6 - 12.8 v DC 
> fully charged.  It
> > doesn't take too long for them to drop below the point 
> where the FT-736
> 
>