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Today's Topics:
1. Re: Satellites and Solar (Greg D)
2. Re: Satellites and Solar (a) (Edward R Cole)
3. Icom IC-W32 Power Supply Assistance (Oliver)
4. Hello de 9H5G (John, 9H5G)
5. Space-X CRS-8 Dragon Launch Video (Eric Rosenberg)
6. Oscar 7 Mode A (jeffory broughton)
7. Re: Hello de 9H5G (Patrick STODDARD (WD9EWK/VA7EWK))
8. Re: Satellites and Solar (Stephen Nelson)
9. Re: [Video] Rainy SO-50 (R.T.Liddy)
----------------------------------------------------------------------
Message: 1
Date: Fri, 8 Apr 2016 23:18:49 -0700
From: Greg D <ko6th.greg@xxxxx.xxx>
To: Stephen Nelson <steve.motorola.uranium@xxxxx.xxx>, Robert Bruninga
<bruninga@xxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Satellites and Solar
Message-ID: <57089EC9.8030302@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
I haven't tried it in a while, but it seemed that the battery UPS units
needed a "real looking" mains before letting go of the batteries and
getting out of the way. Chaining two UPS units, for example, the second
one never kicks in.
Has this changed? Will a generator's output be seen as clean enough to
satisfy the UPS to let the load run off it, and to recharge their own
batteries?
Regarding using the electric vehicle's battery, I think the safest way
is to limit your use to the "Accessory" outlet, pulling no more than its
rated 8-amps or so. Plenty to charge your HTs, laptops, cell phones,
flashlights, and so forth.
Greg KO6TH
Stephen Nelson wrote:
> Since we are "poor", we do not have solar.... or a house, only an
> apartment.
>
> The plan we have is to use a Honda inverter type generator, supplying a
> 2.2kW APC UPS rack unit which has all the toys plugged into that shuts off
> the computer automatically when the batteries get below a threshold. That
> gives me ~40 mins to change over to the generator if I am home, or start
> the generator when I get home if needed, for radios and fridge. Batteries
> are not super expensive when bought online. I get mine from here,
> http://www.tempestbatteries.com/. This is not to run the house, just take
> the slack between switch over if I am at home for sensitive equipment, or
> from surge issues from high winds, which we have here...and no... the
> fridge is not on the UPS.
>
> I have pushed a similar design at our radio sites, because there is a small
> amount of time which site generators start and the UPS do wonders to take
> up the slack between power loss, and when the generator fully up and switch
> over. Computers, POE devices like microwave links, AIS receivers, etc, do
> not like small brownouts and get "confused' which usually resulted in a
> drive to the site for a power reset.
>
> Love the apocalypse ideas...and never thought to feed switchers 300V DC
> before, but that makes sense, and a darn good idea. For myself, high
> voltage DC is the last thing I would want to play with in an emergency.
>
> -Stephen N.
> KD6VEX
>
>
> On Fri, Apr 8, 2016 at 4:04 PM, Robert Bruninga <bruninga@xxxx.xxx> wrote:
>
>>> Newer grid-tie inverters allow for AC power (1.5 kW per inverter)
>>> to be drawn without primary power.
>> True. And the newer models from SMA with the built-in 15 amp grid-down
>> inverter cost $60 LESS than their previous model of the same 3 kW wattage
>> without the backup (and weighs 30 lbs less!)
>>
>>
>>
http://sunelec.com/inverters/inverters-grid-tie/string/sunny-boy-3000tl-us-22-
transformerless-grid-tie-inverter.html
>>
>>
>>
http://sunelec.com/inverters/inverters-grid-tie/string/sunny-boy-3000w-inverte
r.html
>>
>> But even when the grid goes down, you still have all that DC power from
>> dozens of solar panels operating at 30VDC each usually connected in series.
>> So, my Armageddon plan is to just tap into my 14 pannel array at the 300
>> volt point (10 panels) and these days, 300 VDC will power almost every
>> modern electronics piece of equipment AS IS.
>>
>> Just look at your laptop, cell charger, TV, stereo, PC, and most every
>> plugin supply and you will see most have universal supplies operating from
>> 100-to-240VAC and if it is lightweight (has no 60 Hz heavy iron
>> transformer)
>> by definition, that means it is actually a DC/DC switching power supply
>> that
>> can run just as well on DC as AC, since all they do is first rectify to DC
>> before doing all their switching magic. I have plugged in every such
>> supply
>> and device into the 200 VDC of my preius battery and ALL work just fine.
>>
>> In fact, I did a recent test of a half dozen laptop type plug in supplies
>> and they all worked down below 70 volts DC input! Amazing supplies able to
>> deliver full rated output with ANY input from 70 VDC to 330 VDC and 100 VAC
>> to 240 VAC and not know the difference!
>>
>> Remember, a full wave rectified 240 VAC source becomes 330 VDC at the first
>> input capacitor and that is why ANY DC from around 100 volts to over 300
>> VDC
>> can be used as is on any of these supplies. And you can distribute
>> almost
>> TEN TIMES the power at 300 VDC than at 100 V AC because the current is
>> 1/3rd
>> and hence the I-squared- wire loses are 1/9th over the same wire.
>>
>> CAUTION: Although it is trivial, it is also dangerous if you don?t
>> understand what you are doing. Do not do this at home. A few cautions:
>>
>> 1) MOST of what you really need in a power outage WILL NOT RUN on DC.
>> Furnace, refrigerator, well pump, anything with a 60 Hz motor or
>> transformer
>> 2) Unless you add a snubber circuit to EVERY SWITCH in every device, you
>> will destroy the switch the first time you try to turn the device off on
>> DC.
>> You cannot open a circuit with DC, because the arc will just keep flowing
>> and melt/burn everything in reach. Including your house.
>> 4) NEC requires ALL in-house DC wiring over 50v or so to be in METAL
>> CONDUIT
>> for this reason.
>> 5) Workaround is to UNPLUG quickly and be amazed at the large Arc-Flash.
>> 6) Shock hazard
>>
>> SOoooo... here is my safe suggestion. Keep your eyes open for BODACIOUS
>> surplus DC/DC power supplies from server racks and anything else with huge
>> power supplies. At last night's radio club, a guy showed me one the size
>> of
>> a cigar box that was not only 100Amps at 5 volts but also 30 amps at 12v.
>> And its input was the universal 100-240VAC. Meaning it would run perfectly
>> fine on 300 VDC from my solar array tap. In fact your modern shack DC/DC
>> supply of 25A at 12 v will run from the 100-330 VDC input.
>>
>> Then hook this to a 12v battery to provide some surge capacity and then
>> hook
>> it to a 1500W standard 12v-to-120 VAC 60 cycle inverter from any store
>> (about $150). Bingo, you have 1500W AC with the grid down for $150 (and
>> the big DC/DC suppl you found at the last Hamfest to give you the 12 vdc at
>> high amperage from the HV DC at low amperage from your array..
>>
>> Oh, also, EVERY HYBRID car (now there are 60 on the market) also has a
>> similar 100 AMP at 12v DC/DC supply to power the accessories in the car
>> from
>> the 200 to 400 VDC car hybrid battery. Get one of these from a junk yard,
>> and there too is a huge source of high power, high voltage DDC/DC supply
>> that can then run conventional 12v-to-120 VAC 60 hz inverters.
>>
>> The ten panel tap at the 300v point in an 8 amps string can supply over
>> 2400
>> W continuous power to this arrangement. Use two supplies and two inverters
>> to make full use of this string.
>>
>> SO again, just because the grid goes down does not mean your solar array
>> stops producing. It just means it stops producing grid-tie-energy. You
>> still have all that DC to do all kinds of things with... including
>> converting back to AC off grid and/or burning your house down through
>> stupid
>> tricks.
>>
>> Bob, WB4APR
>>
>>
>> On Fri, Apr 8, 2016 at 1:47 PM, Stephen Nelson
>> <steve.motorola.uranium@xxxxx.xxx> wrote:
>>> Talking solar with my non Ham friends and there is a misconception that
>>> solar can be used for emergency power, which at least in my area, it
>>> cannot be. Solar inverter shuts down once the utility main sense is lost.
>>>
>>> I have also heard strange rumors that the panels go bad just after the
>>> cost of the system has paid for itself. This might be a wives tail, as
>>> remote sites I have seen, the solar panels last much longer than 10
>> years.
>>> Sent via iPhone 5s.....73's KD6VEX
>>>
>>> Stephen N.
>>>
>>>> On Apr 8, 2016, at 9:35 AM, Robert Bruninga <bruninga@xxxx.xxx> wrote:
>>>>
>>>> Solar Rant:
>>>>
>>>>
>>>>
>>>> Last night I gave a talk to a local Ham club about Emergency Power
>>>> (solar) for the Ham. Turns out, I had given a similar talk on the
>>>> same topic to the same group 6 years ago (2010).
>>>>
>>>>
>>>>
>>>> But the world has CHANGED (and most of us (and them) have not? except
>>>> get older)..
>>>>
>>>>
>>>>
>>>> I began ?How many of you pay about $200/mo for electricity?? Most
>>>> hands went up
>>>>
>>>>
>>>>
>>>> ?How many of you went solar since my last talk?? (one hand went up).
>>>> ?Why not?? I ask.
>>>>
>>>>
>>>>
>>>> General response was, ?.. it costs too much??
>>>>
>>>>
>>>>
>>>> I went on, ?Do the rest of you with the $200/mo electric bill realize
>>>> you have spent almost $15,000 to the utility since my last talk, and
>>>> did not also take the $5000 tax credit, so you have wasted over
>>>> $20,000 and have absolutely nothing to show for it except another
>>>> $200 a month for the rest of your life, and another $24,000 thrown
>>>> away every ten years (probably twice that with inflation)??
>>>>
>>>>
>>>>
>>>> ?Don?t tell me it costs too much?. It costs too much to do nothing!?
>>>>
>>>> ?This other solar guy hardly pays anything now, or the last 6 years
>>>> or the rest of his life!?
>>>>
>>>>
>>>>
>>>> Most people in the room said they would probably go solar ?someday?.
>>>> But now they are starting to realize that every single month they
>>>> send another
>>>> $200 to the utility, that is another $200 thrown away? when instead
>>>> it could have gone for their solar investment which remains EQUITY in
>>>> their hands, on their roof, or in their yard and which pays back over
>>>> 10% annual return on the investment every year for the rest of their
>>>> life.
>>>>
>>>>
>>>>
>>>> Sorry for the rant. Every AMSAT station needs power. Are you going
>>>> to continue to burn coal to supply your energy and pay the utility
>>>> forever, at higher cost, or are you going to do something about it
>>>> now and start getting free power forever and breath cleaner air.
>>>>
>>>>
>>>>
>>>> See http://aprs.org/solar-now.html
>>>>
>>>>
>>>>
>>>> AMSAT TOO: I just looked it up. I gave this talk at the AMSAT/TAPR
>>>> Dayton Banquet in 2011. In the 5 years since, you (with $200
>>>> electric bills) have spent over $12,000 in electric bills and have
>>>> not taken the over $3600 tax credit either. How many more years are
>>>> you going to throw away good money every month and do nothing?
>>>>
>>>>
>>>>
>>>> Sorry, if you have shade, you are out of solar luck, but hug your
>>>> trees and birds instead! In some states, such as Maryland, you can
>>>> still invest in community solar where your solar panels will be credited
>>>> to your bill.
>>>>
>>>>
>>>>
>>>> Also in Maryland and some other progressive states, if you have some
>>>> remote land or antenna farm somewhere else, You can install your
>>>> solar panels there, and get that electric meter to provide 100%
>>>> credit to your own home bill. Neat! Its called ?virtual-net-metering?.
>>>>
>>>>
>>>>
>>>> It?s a whole new world of energy changing under your feet?. Every day..
>>>>
>>>>
>>>>
>>>> Bob, WB4APR
>>>> _______________________________________________
>>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>>> to all interested persons worldwide without requiring membership.
>>>> Opinions expressed are solely those of the author, and do not reflect
>> the
>>>> official views of AMSAT-NA.
>>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>>>> program!
>>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership.
>>> Opinions expressed are solely those of the author, and do not reflect the
>>> official views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
------------------------------
Message: 2
Date: Fri, 08 Apr 2016 23:25:57 -0800
From: Edward R Cole <kl7uw@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Satellites and Solar (a)
Message-ID: <201604090725.u397PvoU017990@xxxxxxxxx.xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I have been thinking about adding solar. Of course up here in the
sub-arctic winter nights are long and summer nights short, so seven
months of the year solar provides quite a bit. Doing co-generation
with the utility definitely reduces your personal utility costs if
you do not need battery banks.
I already have a standby gasoline generator (6500w Honda) for power
outages. Up here its quite normal to have five or so episodes
lasting up to twelve hours/each per year. Very nice to be able to
push button for electric start and resume normal life when the power
goes out. I can even run my kilowatt amp if I desired. We live in
the country so have own well and septic so having backup power keeps
everything running. Heat is natural gas but furnace needs power for
blower and ignition.
I inquired at the local power office when recently paying the bill
and they support co-gen so all I need to is do my research and save
some pennies.
BTW I installed solar panels at work before I retired so have a bit
of background. Solar insolation on a cloudy day is only 70% down
from a clear day.
If enough private solar power were built it probably would offset
building some of the utility infrastructure in the future. That
might even lower the utilities' cost. Up here one utility installed
several large windchargers out on a island which has reliable
sustained wind which is supplementing the grid (25Mw I
believe). There is ample hydro power so solar might depend on the
small private sector to build?
73, Ed - KL7UW
Nikiski, AK BP40iq
Date: Fri, 8 Apr 2016 17:31:21 -0400
From: <jmfranke@xxx.xxx>
To: amsat-bb@xxxxx.xxxx Robert Bruninga <bruninga@xxxx.xxx>
Subject: Re: [amsat-bb] Satellites and Solar (a)
Message-ID: <20160408173121.S6MF2.63087.imail@xxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
And the price of commercial electricity will go up because the power
companies will still have to support the infrastructure to supply the
full load at night or during cloudy weather yet have it sitting idle
when as they say "The Sun is shining."
John WA4WDL
----snipped the rest of the long thread that everyone has already read -
right/
73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubususa@xxxxx.xxx
------------------------------
Message: 3
Date: Fri, 8 Apr 2016 17:43:01 -0500
From: Oliver <mr.soup12@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Icom IC-W32 Power Supply Assistance
Message-ID:
<CAD+wY0s=p+Jez8FSOAoqePe--ahtX+2Vbh5HcpJqs-8W3BWatw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I just received a well loved ic-w32 from ebay. I need to get a new battery
and a charger for it though. Both are expected.
Before I do, though I'd like to make sure it _actually_ works. I have a
variable DC power supply I was thinking of either bypassing the battery
with or powering via the external dc jack. I don't know what the contact
middle contact does though, so I'm hesitant to try that idea. Need to keep
the magic smoke in ...
Does anyone have experience doing this? Maybe information on the DC jack
polarity? The service manual I found online doesn't mention much about
powering it up.
Any others tips or pointers on the w32a I should know?
Thanks for your time.
------------------------------
Message: 4
Date: Sat, 9 Apr 2016 17:49:13 +1200
From: "John, 9H5G" <kk4oyj@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Hello de 9H5G
Message-ID: <FB4F288E-F978-4F01-B6DD-5D332305606B@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hello,
I'm a recent (read inexperienced hi hi) satellite op working only FM at the
moment and always /P.
I'm currently in RE45 (ZL - South Island) but have heard no activity so far
on SO-50. I'd be interested to know if this is normal down here.
73 de John, 9H5G
------------------------------
Message: 5
Date: Sat, 9 Apr 2016 10:08:23 -0400
From: Eric Rosenberg <ericrosenberg.dc@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Space-X CRS-8 Dragon Launch Video
Message-ID: <57090CD7.5010005@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
For those who may have missed yesterday's launch, it's available on
Livestream:
http://livestream.com/spacex/crs8/videos/118668484?origin=digest&mixpanel_id=a
3817fd678e79-0f41afd19-43681f0a-2ee000-a3817fd679f25&acc_id=7373266&medium=ema
il
Don't miss the landing of the first stage on the "Of Course I Still Love
You" floating platform at ~27 minutes into the video.
Way Cool!
Enjoy & 73,
Eric W3DQ
------------------------------
Message: 6
Date: Sat, 9 Apr 2016 10:28:36 -0400
From: jeffory broughton <jefforybroughton@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Oscar 7 Mode A
Message-ID:
<CACm2je252A_5VmNWd5hBEkipKBj9J8=UWwN_wtO323X7np37HQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
WB8RJY EN72 CENTRAL MICHIGAN
jeff broughton
------------------------------
Message: 7
Date: Sat, 9 Apr 2016 14:47:08 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Hello de 9H5G
Message-ID:
<CAN6TEUe7MGpKt13Ae70P9C-ZzdyjohnHNiAH9FE2Hi=kMG=k_w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi John!
It is rare to ever hear SO-50 crowded in that part of the world,
compared to what you'd hear over North America or Europe. Depending
on the passes you are trying, you may not be in the footprints
with the North Island in ZL or eastern Australia, where there are
some regulars working SO-50 and other satellites. Do you have a
memory channel programmed to transmit on 145.850 MHz with the 74.4
Hz PL tone? You may need to turn the satellite on and then make
some calls, in case everyone is listening but not trying to activate
the satellite's 10-minute timer.
Have you tried AO-85 down there? That satellite may be more of a
challenge than SO-50 to work, but give it a try if there are some
passes compatible with your schedule down there.
I was in Australia in 2011, and found that satellite passes were
more laid back than here. On the SO-50 passes I worked from
locations around Melbourne and Sydney, I was lucky if I heard more
than two other stations. This made for nice chats. There was no
interest in exchanging grid locators, even though I had my TH-D72A HT
and a Garmin GPS receiver to know my grid locator whenever I worked
satellite passes (QF22 when around Melbourne, QF56 when in or near
Sydney).
On the AMSAT-VK Yahoo! group:
http://groups.yahoo.com/group/amsatvk/
I have seen reports where there were more stations on some SO-50
passes than just 2 or 3, but for you the footprints will determine
if that is possible. You may want to join that list and mention
you are in the region, as that might drum up some activity.
Good luck, and 73!
Patrick WD9EWK/VA7EWK (VK/WD9EWK in 2011)
http://www.wd9ewk.net/
Twitter: @xxxxxx
On Sat, Apr 9, 2016 at 5:49 AM, John, 9H5G <kk4oyj@xxxxx.xxx> wrote:
> Hello,
>
> I'm a recent (read inexperienced hi hi) satellite op working only FM at
> the moment and always /P.
> I'm currently in RE45 (ZL - South Island) but have heard no activity so
> far on SO-50. I'd be interested to know if this is normal down here.
>
> 73 de John, 9H5G
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
------------------------------
Message: 8
Date: Sat, 9 Apr 2016 08:27:56 -0700
From: Stephen Nelson <steve.motorola.uranium@xxxxx.xxx>
To: Greg D <ko6th.greg@xxxxx.xxx>
Cc: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] Satellites and Solar
Message-ID:
<CALsCOXHy+XutJyA0eQBKG6nkv87i_MXCkCh9kgkkekJQtZFAhQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
The few times I tested the configuration it worked fine, the UPS
transferred the load and there were no voltage high or low alarms while
running. Only issue I had was the day I was testing, there was no wind, and
the exhaust started to choke the engine intake and sputter a little. That
make the UPS unhappy, but output power was constant to the radios.
Generator: Honda EU2000i
UPS: APC SU2200R3X
<http://www.upsbatterycenter.ca/apc-smart-ups-2200-rack-mount-3u-su2200r3x167-
batteries>
Generator is new, but the UPS was scrap and was free. Had to buy new
batteries, change two voltage divider resistors to bring down the float
voltage to where it should be. This generation UPS has issues of cooking
the batteries after ~1 year, so I installed two trim pots to take care of
that. It has been a few years and the issue has not happened again, nor has
the power been out.
The best insurance policy against shore power loss is to buy a generator!
-Stephen N.
KD6VEX
On Fri, Apr 8, 2016 at 11:18 PM, Greg D <ko6th.greg@xxxxx.xxx> wrote:
> I haven't tried it in a while, but it seemed that the battery UPS units
> needed a "real looking" mains before letting go of the batteries and
> getting out of the way. Chaining two UPS units, for example, the second
> one never kicks in.
>
> Has this changed? Will a generator's output be seen as clean enough to
> satisfy the UPS to let the load run off it, and to recharge their own
> batteries?
>
> Regarding using the electric vehicle's battery, I think the safest way
> is to limit your use to the "Accessory" outlet, pulling no more than its
> rated 8-amps or so. Plenty to charge your HTs, laptops, cell phones,
> flashlights, and so forth.
>
> Greg KO6TH
>
>
> Stephen Nelson wrote:
> > Since we are "poor", we do not have solar.... or a house, only an
> > apartment.
> >
> > The plan we have is to use a Honda inverter type generator, supplying a
> > 2.2kW APC UPS rack unit which has all the toys plugged into that shuts
> off
> > the computer automatically when the batteries get below a threshold. That
> > gives me ~40 mins to change over to the generator if I am home, or start
> > the generator when I get home if needed, for radios and fridge. Batteries
> > are not super expensive when bought online. I get mine from here,
> > http://www.tempestbatteries.com/. This is not to run the house, just
> take
> > the slack between switch over if I am at home for sensitive equipment, or
> > from surge issues from high winds, which we have here...and no... the
> > fridge is not on the UPS.
> >
> > I have pushed a similar design at our radio sites, because there is a
> small
> > amount of time which site generators start and the UPS do wonders to take
> > up the slack between power loss, and when the generator fully up and
> switch
> > over. Computers, POE devices like microwave links, AIS receivers, etc, do
> > not like small brownouts and get "confused' which usually resulted in a
> > drive to the site for a power reset.
> >
> > Love the apocalypse ideas...and never thought to feed switchers 300V DC
> > before, but that makes sense, and a darn good idea. For myself, high
> > voltage DC is the last thing I would want to play with in an emergency.
> >
> > -Stephen N.
> > KD6VEX
> >
> >
> > On Fri, Apr 8, 2016 at 4:04 PM, Robert Bruninga <bruninga@xxxx.xxx>
> wrote:
> >
> >>> Newer grid-tie inverters allow for AC power (1.5 kW per inverter)
> >>> to be drawn without primary power.
> >> True. And the newer models from SMA with the built-in 15 amp grid-down
> >> inverter cost $60 LESS than their previous model of the same 3 kW
> wattage
> >> without the backup (and weighs 30 lbs less!)
> >>
> >>
> >>
>
http://sunelec.com/inverters/inverters-grid-tie/string/sunny-boy-3000tl-us-22-
transformerless-grid-tie-inverter.html
> >>
> >>
> >>
>
http://sunelec.com/inverters/inverters-grid-tie/string/sunny-boy-3000w-inverte
r.html
> >>
> >> But even when the grid goes down, you still have all that DC power from
> >> dozens of solar panels operating at 30VDC each usually connected in
> series.
> >> So, my Armageddon plan is to just tap into my 14 pannel array at the 300
> >> volt point (10 panels) and these days, 300 VDC will power almost every
> >> modern electronics piece of equipment AS IS.
> >>
> >> Just look at your laptop, cell charger, TV, stereo, PC, and most every
> >> plugin supply and you will see most have universal supplies operating
> from
> >> 100-to-240VAC and if it is lightweight (has no 60 Hz heavy iron
> >> transformer)
> >> by definition, that means it is actually a DC/DC switching power supply
> >> that
> >> can run just as well on DC as AC, since all they do is first rectify to
> DC
> >> before doing all their switching magic. I have plugged in every such
> >> supply
> >> and device into the 200 VDC of my preius battery and ALL work just fine.
> >>
> >> In fact, I did a recent test of a half dozen laptop type plug in
> supplies
> >> and they all worked down below 70 volts DC input! Amazing supplies
> able to
> >> deliver full rated output with ANY input from 70 VDC to 330 VDC and 100
> VAC
> >> to 240 VAC and not know the difference!
> >>
> >> Remember, a full wave rectified 240 VAC source becomes 330 VDC at the
> first
> >> input capacitor and that is why ANY DC from around 100 volts to over 300
> >> VDC
> >> can be used as is on any of these supplies. And you can distribute
> >> almost
> >> TEN TIMES the power at 300 VDC than at 100 V AC because the current is
> >> 1/3rd
> >> and hence the I-squared- wire loses are 1/9th over the same wire.
> >>
> >> CAUTION: Although it is trivial, it is also dangerous if you don?t
> >> understand what you are doing. Do not do this at home. A few cautions:
> >>
> >> 1) MOST of what you really need in a power outage WILL NOT RUN on DC.
> >> Furnace, refrigerator, well pump, anything with a 60 Hz motor or
> >> transformer
> >> 2) Unless you add a snubber circuit to EVERY SWITCH in every device, you
> >> will destroy the switch the first time you try to turn the device off on
> >> DC.
> >> You cannot open a circuit with DC, because the arc will just keep
> flowing
> >> and melt/burn everything in reach. Including your house.
> >> 4) NEC requires ALL in-house DC wiring over 50v or so to be in METAL
> >> CONDUIT
> >> for this reason.
> >> 5) Workaround is to UNPLUG quickly and be amazed at the large Arc-Flash.
> >> 6) Shock hazard
> >>
> >> SOoooo... here is my safe suggestion. Keep your eyes open for
> BODACIOUS
> >> surplus DC/DC power supplies from server racks and anything else with
> huge
> >> power supplies. At last night's radio club, a guy showed me one the
> size
> >> of
> >> a cigar box that was not only 100Amps at 5 volts but also 30 amps at
> 12v.
> >> And its input was the universal 100-240VAC. Meaning it would run
> perfectly
> >> fine on 300 VDC from my solar array tap. In fact your modern shack
> DC/DC
> >> supply of 25A at 12 v will run from the 100-330 VDC input.
> >>
> >> Then hook this to a 12v battery to provide some surge capacity and then
> >> hook
> >> it to a 1500W standard 12v-to-120 VAC 60 cycle inverter from any store
> >> (about $150). Bingo, you have 1500W AC with the grid down for $150
> (and
> >> the big DC/DC suppl you found at the last Hamfest to give you the 12
> vdc at
> >> high amperage from the HV DC at low amperage from your array..
> >>
> >> Oh, also, EVERY HYBRID car (now there are 60 on the market) also has a
> >> similar 100 AMP at 12v DC/DC supply to power the accessories in the car
> >> from
> >> the 200 to 400 VDC car hybrid battery. Get one of these from a junk
> yard,
> >> and there too is a huge source of high power, high voltage DDC/DC supply
> >> that can then run conventional 12v-to-120 VAC 60 hz inverters.
> >>
> >> The ten panel tap at the 300v point in an 8 amps string can supply over
> >> 2400
> >> W continuous power to this arrangement. Use two supplies and two
> inverters
> >> to make full use of this string.
> >>
> >> SO again, just because the grid goes down does not mean your solar array
> >> stops producing. It just means it stops producing grid-tie-energy. You
> >> still have all that DC to do all kinds of things with... including
> >> converting back to AC off grid and/or burning your house down through
> >> stupid
> >> tricks.
> >>
> >> Bob, WB4APR
> >>
> >>
> >> On Fri, Apr 8, 2016 at 1:47 PM, Stephen Nelson
> >> <steve.motorola.uranium@xxxxx.xxx> wrote:
> >>> Talking solar with my non Ham friends and there is a misconception that
> >>> solar can be used for emergency power, which at least in my area, it
> >>> cannot be. Solar inverter shuts down once the utility main sense is
> lost.
> >>>
> >>> I have also heard strange rumors that the panels go bad just after the
> >>> cost of the system has paid for itself. This might be a wives tail, as
> >>> remote sites I have seen, the solar panels last much longer than 10
> >> years.
> >>> Sent via iPhone 5s.....73's KD6VEX
> >>>
> >>> Stephen N.
> >>>
> >>>> On Apr 8, 2016, at 9:35 AM, Robert Bruninga <bruninga@xxxx.xxx>
> wrote:
> >>>>
> >>>> Solar Rant:
> >>>>
> >>>>
> >>>>
> >>>> Last night I gave a talk to a local Ham club about Emergency Power
> >>>> (solar) for the Ham. Turns out, I had given a similar talk on the
> >>>> same topic to the same group 6 years ago (2010).
> >>>>
> >>>>
> >>>>
> >>>> But the world has CHANGED (and most of us (and them) have not? except
> >>>> get older)..
> >>>>
> >>>>
> >>>>
> >>>> I began ?How many of you pay about $200/mo for electricity?? Most
> >>>> hands went up
> >>>>
> >>>>
> >>>>
> >>>> ?How many of you went solar since my last talk?? (one hand went up).
> >>>> ?Why not?? I ask.
> >>>>
> >>>>
> >>>>
> >>>> General response was, ?.. it costs too much??
> >>>>
> >>>>
> >>>>
> >>>> I went on, ?Do the rest of you with the $200/mo electric bill realize
> >>>> you have spent almost $15,000 to the utility since my last talk, and
> >>>> did not also take the $5000 tax credit, so you have wasted over
> >>>> $20,000 and have absolutely nothing to show for it except another
> >>>> $200 a month for the rest of your life, and another $24,000 thrown
> >>>> away every ten years (probably twice that with inflation)??
> >>>>
> >>>>
> >>>>
> >>>> ?Don?t tell me it costs too much?. It costs too much to do nothing!?
> >>>>
> >>>> ?This other solar guy hardly pays anything now, or the last 6 years
> >>>> or the rest of his life!?
> >>>>
> >>>>
> >>>>
> >>>> Most people in the room said they would probably go solar ?someday?.
> >>>> But now they are starting to realize that every single month they
> >>>> send another
> >>>> $200 to the utility, that is another $200 thrown away? when instead
> >>>> it could have gone for their solar investment which remains EQUITY in
> >>>> their hands, on their roof, or in their yard and which pays back over
> >>>> 10% annual return on the investment every year for the rest of their
> >>>> life.
> >>>>
> >>>>
> >>>>
> >>>> Sorry for the rant. Every AMSAT station needs power. Are you going
> >>>> to continue to burn coal to supply your energy and pay the utility
> >>>> forever, at higher cost, or are you going to do something about it
> >>>> now and start getting free power forever and breath cleaner air.
> >>>>
> >>>>
> >>>>
> >>>> See http://aprs.org/solar-now.html
> >>>>
> >>>>
> >>>>
> >>>> AMSAT TOO: I just looked it up. I gave this talk at the AMSAT/TAPR
> >>>> Dayton Banquet in 2011. In the 5 years since, you (with $200
> >>>> electric bills) have spent over $12,000 in electric bills and have
> >>>> not taken the over $3600 tax credit either. How many more years are
> >>>> you going to throw away good money every month and do nothing?
> >>>>
> >>>>
> >>>>
> >>>> Sorry, if you have shade, you are out of solar luck, but hug your
> >>>> trees and birds instead! In some states, such as Maryland, you can
> >>>> still invest in community solar where your solar panels will be
> credited
> >>>> to your bill.
> >>>>
> >>>>
> >>>>
> >>>> Also in Maryland and some other progressive states, if you have some
> >>>> remote land or antenna farm somewhere else, You can install your
> >>>> solar panels there, and get that electric meter to provide 100%
> >>>> credit to your own home bill. Neat! Its called
> ?virtual-net-metering?.
> >>>>
> >>>>
> >>>>
> >>>> It?s a whole new world of energy changing under your feet?. Every
> day..
> >>>>
> >>>>
> >>>>
> >>>> Bob, WB4APR
> >>>> _______________________________________________
> >>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> >>>> to all interested persons worldwide without requiring membership.
> >>>> Opinions expressed are solely those of the author, and do not reflect
> >> the
> >>>> official views of AMSAT-NA.
> >>>> Not an AMSAT-NA member? Join now to support the amateur satellite
> >>>> program!
> >>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >>> _______________________________________________
> >>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> >>> to all interested persons worldwide without requiring membership.
> >>> Opinions expressed are solely those of the author, and do not reflect
> the
> >>> official views of AMSAT-NA.
> >>> Not an AMSAT-NA member? Join now to support the amateur satellite
> >> program!
> >>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
> >
> >
>
>
--
Stephen Nelson
???????
??????????
KD6VEX
------------------------------
Message: 9
Date: Sat, 9 Apr 2016 17:28:25 +0000 (UTC)
From: "R.T.Liddy" <k8bl@xxxxxxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] [Video] Rainy SO-50
Message-ID:
<1430109372.2216905.1460222905054.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
John,
Excellent video!!! ?Thanks for sharing. ?Great editing !!
I plan to do NS39 Pres. Garfield Home which is onlyabout a mile from my QTH.
But, it'll have to wait untilour 7 inches of snow melts - HIHI.
73, ? ? ?Bob K8BL
From: John Brier <johnbrier@xxxxx.xxx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Sent: Tuesday, April 5, 2016 11:54 PM
Subject: [amsat-bb] [Video] Rainy SO-50
https://youtu.be/ApvgwlB4Isw
This is from the 2016-03-27 2111Z SO-50 pass over North America.
Here are the all the stations heard on this pass, when they were first
heard. There were 19 in all:
00:02 KG5CCI
00:06 K4FEG
00:13 N8HM FM18
00:28 N4UFO
00:45 KM4RTS EM90
01:01 W4DTA EM55
01:40 KA4H FM17
01:58 KI4RO
02:09 WA5KBH EM30
02:22 KG4AKV FM05
03:38 W5PFG EM21
04:01 KC1EXK FN41
04:55 W4HH FM17
06:33 ??3GNF EN82 (partial callsign heard, full call heard at 08:20)
06:43 N0VVV FN33
06:47 ???QJQ FN30 (partial callsign heard, full call heard at 07:09)
06:57 W2JV
07:09 WA2QJQ (full callsign heard)
08:20 VE3GNF (full callsign first heard)
09:27 KA3RLZ FN42
09:42 K8II EM79
73, John KG4AKV
P.S.
If I got any information wrong let me know and I can overlay
annotations on the video using YouTube.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 11, Issue 110
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