There are many deisel mechanics who are missing fingers because they didn't take
rings off while working on 12 volt electrical systems on trucks with paralleled
bateries.
Tom N5GE
On Mon, 4 Apr 2011 15:25:25 -0700, "Ron D'Eau Claire" wrote:
>In the 24 volt aircraft systems I worked with power
There were rules when I worked in the big 24 volt power supply cave
underneath the AT&T building at 13th & G in Washington DC. No rings,
no watches, nothing hanging on your neck, no tools that were not
wrapped, etc. Long sleeve shirts out in the locker. I always brought
tee shirt to work in ther
In the 24 volt aircraft systems I worked with power was typically routed
into the cockpit via 1/2" diameter copper rods that ran along behind the
breaker panels. Breakers for each circuit were tapped into the rod with
threaded holes and screw.
That's what it takes to avoid excessive I^2R losses f
craft] Local Noise Problem
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On 4/3/2011 10:12 AM, AB8XA wrote:
> The sub-panel will also have a 30 amp circuit to my "shack,"
feeding a 24 V
Hi Joe
Over here I've noticed that whenever "wiring" of any kind is to be
installed, businesses and domestics that I've heard about always employ
qualified electricians. The wiring itself may not need a qualified
electrician but how it is routed and juxtaposed with mains, particularly
when 3-
I'm quite happy with my wish. I've seen led clusters in a MR16 package
deliver the equivalent light to a 43W incandescent for a consumption of
3.6W: that's 300mA at 12V. Our rooms over here are probably smaller than
yours, Jim, but I might have 4 ceiling-mounted units to give me a nice light
Hi,
Clearly, a switch to 12 or 24VDC power distribution in homes is not going to
happen for all the reasons given by K9YC, Jim. Even in cars there is a move
to higher voltage, such as 36VDC. We are stuck with switchers for conversion
to the lower voltages required by many devices and they *can* be
On 4/3/2011 10:12 AM, AB8XA wrote:
> The sub-panel will also have a 30 amp circuit to my "shack," feeding a 24 VDC
> to 13.8 VDC converter for full nominal voltage to our 100 watt rig. There are
> many advantages to 24 VDC over 12 VDC in residential use.
Yes, BUT -- that 24VDC to 12VDC converter
Forgive me for participating in this OT thread fork, but my next house will
have a code-approved sub-panel for overhead and sconce lighting that I'll pull
off 120 VAC after inspection and feed with eight series-parallel 6V golf cart
batteries for nominal 24 VDC. The overhead boxes will each be f
On 4/3/2011 3:24 AM, David Cutter wrote:
> I'm looking forward to a time when all domestic lighting can be run
> from a 12V supply at the main switchboard.
Be careful what you wish for. A major advantage of higher voltage
distribution is that copper losses are much less, and much smaller
coppe
> If governments can ban incandescent light bulbs to save energy, then
> why not change the building regs to encompass new lighting systems
> when they come into mass use. One might beget the other.
Quite simply because their IBEW (electricians union) clients will not
allow it. Low voltage wirin
I'm looking forward to a time when all domestic lighting can be run from a
12V supply at the main switchboard. With led lights progressing as they
are, I can see no reason for continuing to build houses with high voltage ac
for lighting. The wiring will be cheaper and safer and hopefully that
On 4/2/2011 1:07 PM, Jim McCook wrote:
> You may have the answer to the problem!
Your electricians should be happy with one of the small 1A line filters,
Corcom, Delta, or equiv.
73, Jim K9YC
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Jim,
Thanks for those suggestions! It never occurred to me to decouple the
transformers from the AC line. In other words, disconnect the antenna
from the monster. I'm told that many of these little switchers have
toroids or little transformers in them that are pretty effective with
noise su
On 4/2/2011 6:21 AM, Jim McCook wrote:
> There is a very serious problem with the local noise source from low
> voltage lighting systems. These are sold as pendants, single lights, or
> multiple lights on a support, such as a bar. The retailer supplies them
> with a choice of two types of transfo
There is a very serious problem with the local noise source from low
voltage lighting systems. These are sold as pendants, single lights, or
multiple lights on a support, such as a bar. The retailer supplies them
with a choice of two types of transformers, either a regular magnetic
type (non
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