BpnJ,

Here is an outline of a DC Power System (Battery & Charger)
to supply most of your Shortwave Radio 'needs' for a Daily
use of 3 to 6 Hours.
http://groups.yahoo.com/group/Shortw...a/message/6134

For your 'perceived' "Needs" you may wish to consider :

1. THE BATTERY :
12 Volt (12VDC) 18 AH Ampere Hour Battery
- - - 18 Hours at 1 Amp
- - 9 Hours at 2 Amps
- 6 Hours at 3 Amps
4.5 Hours at 4 Amps
3.6+ Hours at 5 Amps
- 3 Hours at 6 Amps
- - 2 Hours at 9 Amps
- - - 1 Hour at 18 Amps

Battery Specifications
GPS-12180
Voltage : 12 Volts AGM
Style : AGM
Amp Hour : 18AH
Length : 7.13"
Width : 2.99"
Height : 6.57"
Batteries Per Pack : 1
Weight : 13 lb

This type of Battery is commonly used in in Moterized Wheelchairs.
Why is this "Sealed" Battery Superior to other Batteries?
* Vibration Resistant Design
* Results in longer battery life
* Superior Delivery
* Faster Charging
* Improved overall performance
* 1 Year Full Replacement Warranty
* Limited warranties offered by the competition
* Deep Discharge Recovery
* Extended design life from improved plate conductivity
* 100% Sealed
* No acid tube or spills
* Eliminates acid damage to chrome or painted areas
* Longer Battery Storage Life
* When fully charged, it can be stored up to 2 years
* May be installed in all positions {Except upside down}
* Great for custom installations
* Shipped Fully Charged
* Ready to install upon receipt of battery
Cost - Prices out around US $ 32

BATTERY DUTY CYCLE :
Estimated Battery Daily Average Duty Cycle of 67%
which is about 12 Ampere Hours (AH) per Day.
= = = Resulting in a 50% Battery Power (AH) Reserve Factor.


2. THE BATTERY CHARGER :
Automatic 12 Volt (12V) Battery Charger 1 Amp
Smart Automatic Battery Charger Rated at 1 Amp to Trickle Charge.
Safely charges and maintains Batteries at Full Charge.
http://www.gruber.com/gps-pdflib/bro.../55-805000.pdf
* Automatic Two Stage Charging - This charger is a two stage
Battery Charger designed to fully charge a Battery and maintain it
at proper storage voltage without the Battery damaging effects
caused by unregulated trickle chargers.
* Alligator Clip Lead Cable Included
* This charger can be used for any AGM, Gel Cell, Vehicle,
and Alarm 12 volt batteries.

Battery Charger Specifications :
APC # : 55-805000
Electrical Voltage Rating : 12V
Electrical Current Rating : 1000 mA = 1 Amp
Length : 3.76"
Width : 2.70"
Height : 2.25"
Weight : 2.02 Oz.
Cables : Alligator Clip
Cost - Prices out around US $ 22

Why is this Battery Charger Superior ?
* UL Approved 1 Amp (1000mA) maximum charge Rate
* Automatic Smart 2-stage charging system
* LED's provide visual indication of the charging mode
* Charge or maintain up to 4 Batteries of similar type -
in parallel Internal charge sensing circuitry and
auto-switch to trickle charge
* Smart Safety Circuit to prevent overcharging and prolong battery
life
* Output posts for a variety of charging purposes.
http://cgi.ebay.com/_W0QQitemZ5629570379

CHARGER DUTY CYCLE :
* Estimated Charger Time of 12 Hours for a Battery Daily Average
Duty Cycle of 67% which is about 12 Ampere Hours (AH) per Day.
= = = Resulting in an available Battery Use Time of 12 Hours.
* Estimated Charger Time of 18 Hours for a Battery Daily Average
Duty Cycle of 100% which is about 18 Ampere Hours (AH) per Day.
= = = Resulting in an available Battery Use Time of 6 Hours.


BUILDING THE "DC POWER SYSTEM" SERVICE BOX :
http://www.officeworld.com/Worlds-Bi...BDY51532/05Q4/
Use a Metal Box for the Electrical and Safety Enclosure
for both the Battery and Charger.
* Install a standard Electrical Box for a regular AC Outlet
* Use a short 6 to 10 Foot Heavy Duty (Outside) Utility Cord
14-16 AWG between the Wall Outlet and the Metal Box.
* Install a standard SPST Electrical Switch for the AC Power
Switch. [On] and [Off] {Off = Emergency Kill Switch}
* Install a DPDT electrical Switch for the [Charge] and [In Use]
DC Power Output Switching. Note - The "Center" Contacts are
for the [Battery]; with one side [Charge] and the other side [In Use]
* Install the Battery {Up-Right Position}
* Plug-in the AC Power to DC Battery Charger
* Wire the Charger and the Battery to the DC Power Switch.
* Install a Smoke Detector as an Over-Load and Fire Detector.
* Wire the Battery to DC Service Distribution Line.


PLACING THE "DC POWER SYSTEM" IN USE :
1. Ensure that the AC Power Switch is Off and the
DC Power Output Switch is in the [Charge] Position.
2. Plug-in the AC Power Cord to the Wall Outlet.
3. Set the DC Power Switch to [Charge]
4. Set the AC Power Switch to [On]
5. Wait 18 Hours for the Battery to be Fully Charged.
6. Set the DC Power Switch to [In Use]
- - - and enjoy your Radios ) !


as always - more than you wanted to know - iane ~ RHF
.
Tous Sont Bienvenus ! - - - Groupe par Radio
d'auditeur d'onde courte pour des Antennes de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
Gruppe für SWL Antennen
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
dell'ascoltatore di onda corta per le Antenne di SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Todos São Bem-vindos ! - - - Grupo de Rádio
do ouvinte do Shortwave para Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
Ð’Ñ�е Ð*адушны ! - - - Группа оператора
на приеме коротковолнового диапазона
Radio дл� Aнтенн SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
¡Todos Son Agradables! - - - Grupo de Radio del oyente
de la onda corta para las Antenas de SWL
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
= = = = = Translation = = = = =
All are Welcome - - - To Join the Shortwave Listeners
(SWL) Antenna Group on YAHOO !
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
.
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