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#1
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Questions re Powering Receiver with a Gel Cell
Hello folks,
I'm interested powering my Drake R8B from a gel cell for outdoor use. The use of gel cells is something I'm totally new to, so I was wondering if perhaps some of you out there who may have some knowledge/experience with this sorta thing might be able to give me some pointers as to * where I might look to find a fair deal on a gel cell * what types of models/brands are worth consideration * what might be required in order to hook the Drake up to a gel cell for proper powering (wires and what-not; admittedly I'm new to this...up to now, I've only powered the Drake from the power outlet in the wall) I would need something that would give me at least 20 hours or so of usage before requiring recharge, and I'm only looking to power the R8B with the unit (not any other accessories or the like). Any help would be much appreciated. jamulc |
#2
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I'm no expert on these matters, but I bought an SLA battery and charger
from these folks: www.zbattery.com. I bought a 'smaller' (fewer amp hours) battery than you're looking for, but their service was good and I have no complaints. You'll want to pick up a fast-blow fuse at Radio Shack for the wires leading from the battery to the spring clip terminals on the back of the R8B. If you aren't planning to travel with your R8B and just want an alternative to your AC outlet, you might also consider an external DC power supply. Several people in this group have said nice things about the Astron supplies. You could also get an inexpensive one from Radio Shack. I have one and it works fine, though I have to put a bit of distance between it and the R8B to avoid a strange noise that's somewhere between a 'hash' and a 'hum'. Best, Steve jamulc wrote: Hello folks, I'm interested powering my Drake R8B from a gel cell for outdoor use. The use of gel cells is something I'm totally new to, so I was wondering if perhaps some of you out there who may have some knowledge/experience with this sorta thing might be able to give me some pointers as to * where I might look to find a fair deal on a gel cell * what types of models/brands are worth consideration * what might be required in order to hook the Drake up to a gel cell for proper powering (wires and what-not; admittedly I'm new to this...up to now, I've only powered the Drake from the power outlet in the wall) I would need something that would give me at least 20 hours or so of usage before requiring recharge, and I'm only looking to power the R8B with the unit (not any other accessories or the like). Any help would be much appreciated. jamulc |
#3
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On 20 Jun 2005 12:14:25 -0700, "jamulc" wrote:
Hello folks, I'm interested powering my Drake R8B from a gel cell for outdoor use. The use of gel cells is something I'm totally new to, so I was wondering if perhaps some of you out there who may have some knowledge/experience with this sorta thing might be able to give me some pointers as to * where I might look to find a fair deal on a gel cell * what types of models/brands are worth consideration * what might be required in order to hook the Drake up to a gel cell for proper powering (wires and what-not; admittedly I'm new to this...up to now, I've only powered the Drake from the power outlet in the wall) I would need something that would give me at least 20 hours or so of usage before requiring recharge, and I'm only looking to power the R8B with the unit (not any other accessories or the like). Any help would be much appreciated. jamulc 2 of these? http://www.bhphotovideo.com/bnh/cont...=228193&is=REG |
#4
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http://www.dekabatteries.com
they should be able to help you out there. plus you would be "Buying American" there one of the few american battery manufacturers left. |
#5
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jamulc wrote:
Hello folks, I'm interested powering my Drake R8B from a gel cell for outdoor use. The use of gel cells is something I'm totally new to, so I was wondering if perhaps some of you out there who may have some knowledge/experience with this sorta thing might be able to give me some pointers as to * where I might look to find a fair deal on a gel cell * what types of models/brands are worth consideration * what might be required in order to hook the Drake up to a gel cell for proper powering (wires and what-not; admittedly I'm new to this...up to now, I've only powered the Drake from the power outlet in the wall) I would need something that would give me at least 20 hours or so of usage before requiring recharge, and I'm only looking to power the R8B with the unit (not any other accessories or the like). Any help would be much appreciated. jamulc ------------------------------------ How much does the radio draw? For example my R2000 draws about 300mA or 0.3 Amps. For it to run 20hours, I would need at least 0.3X20, or "6 amp hours". Given that gell cell makers figure the end point at a lower voltage then the r2000 will really operate from, I need a battery somewhat larger. I have operated for slightly longer then 24Hrs from a 14A/H gell cell. My primary backup batterey is a Pansonic 20A/H gell cell. I have a 1A fuse in the +/positive leg. I would first try contacting local alarm companies. They have to swap out farily new batteries from "high value" clients at regular peroids. You wouldn't want a swanky store to get burgeled because the battery went flat. A 20Hr gell cell is HEAVY. It is a small lead acid battery, the acid is gelled, so don't plan toting this sucker several miles into the woods. I used to take my R2000 for picnics, but it is rough on desk top radios to be handled "roughly" . I had a travel case of 3/8" plywood with foam cushions, but I think the jarring was part or the cause for some failed solder connections. I know carry a DX398, no nearly the radio, but a LOT smaller, and will run or days from a 6A/Hr 6V gell cell, or even operate from a simple PV array I built from scalvaged "solar night lights". Terry |
#6
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The R8B draws a lot of current...2 amps. So, he's going to need a
serious battery. For 20 hours of usage between charges, he'll need a 40A/H battery if he's to avoid 'deep discharge'. That's going to be heavy, and expensive. Steve |
#7
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sdanie wrote:
The R8B draws a lot of current...2 amps. So, he's going to need a serious battery. For 20 hours of usage between charges, he'll need a 40A/H battery if he's to avoid 'deep discharge'. That's going to be heavy, and expensive. Steve --------------------------------------------------------------- At that current level it isn't really practical. Like you said a 40A gell cell is going to be HEAVY. Unless he is at home, or in a camper he needs to get a portable SW that will use less power. Terry |
#9
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dxAce wrote:
used to lug two deep cycle batteries to dxpeditions... it wasn't that much of a hassle as many of them have carry handles. dxAce Michigan USA ------------------------------------- Ah, a man unafraid of exercise! Deep cycles are back breakers. Terry |
#10
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