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ZL3AI > APRDIG 05.12.06 00:02l 296 Lines 12078 Bytes #999 (0) @ WW
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Subj: [APRSSIG] Vol 30 #3, 1/2
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From: ZL3AI@ZL2BAU.#79.NZL.OC
To : APRDIG@WW
Today's Topics:
1. backup pwr systems (Ben Lindner)
2. Winaprs and pmap3.0 (flknbry)
3. Re: backup pwr systems (VE7GDH)
4. Re: backup pwr systems (Richard Amirault)
5. Re: backup pwr systems (Ben Lindner)
6. Re: backup pwr systems (Ben Lindner)
7. Re: backup pwr systems (Joe Della Barba)
8. Aprs filter (flknbry)
9. Re: Aprs filter (Terry Palmer)
10. Re: backup pwr systems (VE7GDH)
11. RE: backup pwr systems (Ray McKnight)
12. smallest tracker? (Rochte, Robert)
13. Re: smallest tracker? (Jason Winningham)
14. Re: smallest tracker? (Curt, WE7U)
15. RE: Winaprs and pmap3.0 (Herb Gerhardt)
16. Re: backup pwr systems (Dale Blanchard)
17. Re: backup pwr systems (Curt, WE7U)
18. Re: smallest tracker? (Richard Amirault)
19. RE: smallest tracker? (Herb Gerhardt)
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Message: 1
Date: Mon, 04 Dec 2006 09:15:53 +1030
From: Ben Lindner <vk5jfk_at_activ8.net.au>
Subject: [aprssig] backup pwr systems
Hi all,
What sort of backup power systems do people use these days. ?
eg.
Running a rig from a standard PSU while charging a battery at the same
time and when the mains power drops out the battery will take over and
run the radio. Then when the mains power is returned every thing is back
to normal, battery is charged again from PSU and radio runs from PSU.
Any body have any ideas on how to work this or has a circuit that I can
build
Ben Lindner
VK5JFK
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Message: 2
Date: Sun, 3 Dec 2006 17:09:58 -0600
From: "flknbry" <flknbry_at_netzero.net>
Subject: [aprssig] Winaprs and pmap3.0
Hi
Am running a machine with Windows xp.And got Winaprs251 and precision
mapping 3.0 to work ok.I downloaded the newer version Winaprs_pma3..I put
all required information on my C:\drive regarding precision mapping and the
251 version pulls from there ok.But when i change from D:\ to C:\ on the
newer version it reverts back to D:\ right away.
Quentin
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Message: 3
Date: Sun, 3 Dec 2006 15:29:24 -0800
From: "VE7GDH" <ve7gdh_at_rac.ca>
Subject: Re: [aprssig] backup pwr systems
Ben VK5JFK wrote...
>What sort of backup power systems do people use these days? eg.
>Running a rig from a standard PSU while charging a battery at the same
>time and when the mains power drops out the battery will take over and
>run the radio. Then when the mains power is returned every thing is back
>to normal, battery is charged again from PSU and radio runs from PSU.
>Any body have any ideas on how to work this or has a circuit that I can
>build
There must be lots of variations. West Mountain Radio has what they call a
PWRgate. It consists of a couple of 80 amp Schottky diodes and some other
circuitry to keep your battery charged. It acts as an OR gate to isolate
the battery and power supply from each other. The forward voltage drop of
less than 0.3 volts at 20 A. When the AC fails, the battery takes over
seamlessly. The power supply should be adjusted to a slightly higher
voltage than normal to make up for the small drop across the diode. They
say that it is a four stage charger ideal for gelled or AGM batteries and
can be set to charge at a 1, 4, 7 or 10 Amp rate. I'm sure there are lots
of batteries out there just floating across a power supply with no proper
charging circuit. The PWRgate does a pretty good job and is better than
nothing. I have a couple of these ahead of Rig Runner "power bars" also
from West Mtn. Radio. Ahead of everything I have a 3 KW true sine wave
inverter and a large battery bank, but I'm powering a bit more than a radio
& a TNC. This is backed up by a 2 KW "inverter" type generator that also
puts out a clean sine wave to keep things ticking along if the power is off
for more than a few hours. Some people have solar panels and a proper
charge controller to maintain their backup batteries. I'll probably add
these some time in the future.
73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!"
------------------------------
Message: 4
Date: Sun, 03 Dec 2006 18:38:56 -0500
From: "Richard Amirault" <ramirault_at_verizon.net>
Subject: Re: [aprssig] backup pwr systems
What's a PSU? Did you mean a UPS?
What I use is an Astron power supply with the optional BB (Battery Backup)
option. A size 27 marine / deep cycle battery is attached. This will power
the rig and the TNC during a power failure but not the computer. Upon
restoration of commercial power the computer is set to re-boot into APRS
automatically.
Richard Amirault N1JDU Boston,
MA, USA
n1jdu.org "Go Fly A Kite"
------------------------------
Message: 5
Date: Mon, 04 Dec 2006 10:54:30 +1030
From: Ben Lindner <vk5jfk_at_activ8.net.au>
Subject: Re: [aprssig] backup pwr systems
Hi Richard,
PSU is what we call a Power Supply(in Australia) to run a radio. UPS
backup system normally used for computers
------------------------------
Message: 6
Date: Mon, 04 Dec 2006 10:57:21 +1030
From: Ben Lindner <vk5jfk_at_activ8.net.au>
Subject: Re: [aprssig] backup pwr systems
Hi Keith,
Do you have a copy of the circuitry used by West Mountain Radio
Ben Lindner
VK5JFK
------------------------------
Message: 7
Date: Sun, 03 Dec 2006 19:50:47 -0500
From: Joe Della Barba <joe_at_dellabarba.com>
Subject: Re: [aprssig] backup pwr systems
You guys are making this way too complicated. You just described a boat
plugged into shore power. The battery charger charges the batteries that
run the radio. When you unplug the cord and leave the dock, then you are
on battery power unless the engine is running. Just go buy a nice big
battery, gel or AGM preferred for indoors, and a decent battery charger.
The nice part is the battery charger only needs to keep up with the
average load, not the peak load.
73
Joe
N3HGB
------------------------------
Message: 8
Date: Sun, 3 Dec 2006 18:50:36 -0600
From: "flknbry" <flknbry_at_netzero.net>
Subject: [aprssig] Aprs filter
Hi
I log into the Montana.Aprs2.net.I wish to filter it somewhat
to let everything thru within 600 miles of my qth.Port 14580
is a user defined port would i write it
Montana.Aprs2.net:14580 filter M/800
I wish to make sure its correct.
Quentin
------------------------------
Message: 9
Date: Sun, 03 Dec 2006 19:56:25 -0500
From: "Terry Palmer" <terrypalmer2_at_compuserve.com>
Subject: Re: [aprssig] Aprs filter
filter m/1000 is closer to 600 miles (1000 km)
------------------------------
Message: 10
Date: Sun, 3 Dec 2006 17:44:21 -0800
From: "VE7GDH" <ve7gdh_at_rac.ca>
Subject: Re: [aprssig] backup pwr systems
Joe N3HGB wrote...
>You guys are making this way too complicated. You just described a boat
>plugged into shore power. The battery charger charges the batteries that
>run the radio. When you unplug the cord and leave the dock, then you are
>on battery power unless the engine is running. Just go buy a nice big
>battery, gel or AGM preferred for indoors, and a decent battery charger.
>The nice part is the battery charger only needs to keep up with the
>average load, not the peak load.
You're right! I should unplug the widescreen TV, TV satellite receiver, AV
amp, AC supplies for radios in two different rooms not overly close to the
deep cycle battery bank & inverter, as well as the fridge and microwave
oven and all the lights throughout the house and get a small battery and
charger and some candles to go with it and uncomplicate my backup power
system <g> but then I wouldn't be able to keep several computers humming
along when the power was off which was the real reason for my backup
system. It's an added bonus that all the radios and related equipment keep
running as well. Everyone should base their backup power system on what
they need to keep running. Some people are happy waiting in the dark.
Others will be satisfied if they can get a flashlight out and hook up a 2M
radio and no APRS equipment and listen on the local repeater (if it's still
running) to everyone commenting on how the power is off, but I like to be
able to keep everything running. Everyone's needs are different. I just
wish I had a boat as well - hi!
73 es cul - Keith VE7GDH
--
"I may be lost, but I know exactly where I am!"
------------------------------
Message: 11
Date: Sun, 3 Dec 2006 22:55:18 -0800
From: "Ray McKnight" <shortsheep_at_worldnet.att.net>
Subject: RE: [aprssig] backup pwr systems
I just managed to find this. It is the "BB" (battery backup) modification
for Astron Power supplies. Ben, do you chaps have Astron's in VK-Land? If
not, this mod might still be useful if your PSU is of similar Design. I am
sending this to you separately as I don't think The SIG allows attachments.
In effect, this mod adds a current Limiting resistor in line with the
voltage regulator IC's feedback Lines. It protects the IC from damage.
Other schemes add a Schotky Diode between the battery and power supply to
prevent voltage reversing To the supply when the power is off. In this
scheme you must increase The supply voltage to compensate for the forward
loss of approx 0.3vDC Across the diode. In any event, the supply voltage
presented to the Battery must be high enough to achieve a 100% charge, as
the last 10% Is the hardest and longest to do. It's around 14.2 volts but
I should Verify that, I also recall a 14.35 or 14.38 depending on battery
type, And that might be charging voltage, not idle voltage after the
battery Has settled down. Of course, the best way to determine charge is
by Specific gravity.
I'm a firm believer in backup generators. Generating more than a few
hundred watts for extended periods Is just too much work with solar, wind
or battery banks/inverters. A combination can do it pretty well, but the
cost becomes prohibitive Compared to a generator which can deliver 5000
watts (2500 average at 50% load) using only 1/2 gallon of petrol per hour.
Here in the Seattle area when I lose power it's usually a minimum of 6 hrs,
often 24, and has been as long as almost 3 days. I also insist on doing it
correctly, not running extension cords and power strips all over the place,
use a GenTran panel and wire it in according to code, and then you can
easily manage the load, balance the gennie, get 240vAC for stuff like water
heaters or a 2KW HF amp, and turn circuits on/off as needed easily and
safely. Plus you cannot possibly fry the poor power line workers dangling
in a bucket 35 ft above your head in freezing or rainy wx, trying to get
your power restored!
Simple is better, candles work well, as do Coleman camping lanterns, But in
the long run, more than a few hours, I find the generator the Cheapest and
simplest solution, and safer than inverters and such, No massive battery
banks to deal with and replace periodically, and It keeps my freezer and
fridgerator cold/frozen and I can still watch Movies in Dolby 5.1 surround
sound and take a nice hot shower.
A single deep cycle battery is fine for a few days for a VHF transceiver,
But beyond that I need the convenience a gennie provides. Everyone should
Evaluate their required needs during emergency power, NOT just what they
Consider comfortable or things they don't want to give up. In my
Experience more than a few hundred watts of EITHER 12vDC or 120vAC Are most
easily provided by a generator. VERY IMPORTANT for USA Hams, It's
IMPERATIVE you stabilize your gasoline when you store it or when It's in
the gennie for more than 30 days, otherwise the gas turns to Jello and
ruins the generator very quickly. I just got mine back from A major
overhaul because old gas gummed the engine after only a few Hours and it
bent a push rod and threw the valve train all out of whack. Plus the inside
of the engine looked like I was burning molasses for fuel. For the price of
gas nowadays you'd think they'd stabilize it for us, but NO, the 40-odd
additives we now must suffer only serve to hasten the demise Of our
engines, not prolong them.
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