[TechAssist] Re: Need advice from engineering folks.
- From: walter wood <wwood_38478@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 5 May 2004 20:04:39 -0700 (PDT)
Jeff;
That sounds similar to what the Von Braun Civic
Center in Huntsville Al. gives us when we play
there. Looks like dryer plugs that terminate into 4
ac plugs on the other end. The civic center was
"wired for sound" when built.
I know a person(used to be in a band with him) that
does sound professionally. He has some large
"jumper cables" that go into a box.
He will take the front off the in house breaker
box, and clamp directly across the incoming line.
Bypasses the house fuse(breaker box) completely.
Thanks for the response.
Walter
--- Shoreline Electronics <jstielau@xxxxxxxx>
wrote:
> Walt,
>
> As you may recall , I have a pro sound company
> and do these type of events
> all the time. We require a 50A single phase drop
> at the stage area ( Just
> like your home oven ). 2 legs of 110V with
> neutral and ground.
>
> We have our own distro that hooks into
> this.......which is basically a
> breaker panel with a 50 range plug that feeds it.
>
> Our early years of doing this , we had the panel
> mounted to a large plywood
> panel with AC outlets mounted to the
> board.......with a small breaker panel
> you do typically 8 separate 20Amp lines. a few
> of our amps require 30A and
> 40A for reliable/full output power.
>
> Our distro is now mounted in a nice rack with the
> breakers on the front and
> the outlets on the back
>
> The light guys have to fend for
> themselves.........our power is NOT for
> them.
>
> Having the stage setup using this distro insures
> everyone has good clean
> power and is on the same power phases which
> prevents ground problems.
>
> You can build a basic distro for about $200
>
>
> =================================
> Jeff Stielau
> Shoreline Electronics Repair
> 344 East Main Street
> Clinton,CT 06413
> (860)399-1861
> (860)664-3535 FAX
> jstielau@xxxxxxxx
> =================================
> ----- Original Message -----
> From: "walter wood" <wwood_38478@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, May 05, 2004 10:48 AM
> Subject: [TechAssist] Re: Need advice from
> engineering folks.
>
>
> > I'll never really know what everyone will show
> up
> > with, tube, transistor etc.
> > This will be two flat bed trailers for the
> stage,
> > full of band equipment.
> > I just needed some advice and ammunition to
> > convince the electric company to put more
> breaker
> > boxes than they have been.
> > Their young engineer doesn't seem to
> understand.
> > In years past, with the band "kicking" some
> light
> > breakers have blown. Then we would have to keep
> > some of the lights off.
> > The college says they need four 20 amp breakers
> > themselves.
> > I'm thinking that two 20 amp circuits would do
> the
> > stage, but why not get 10 if 6 is required at
> > minimum.
> > Thanks
> > Walter
> > --- George <grndmstrg@xxxxxxxxxxxx> wrote:
> > > Walter ,
> > > You didn't state if the amplifier is of solid
> > > state or vacuum tube design.
> > > The way I learned it the fuse requirement is
> > > increased by 10% for the slow
> > > blow type and by 50% for the fast blow
> variety
> > > back when the tube was king .
> > > Was the fuse type and value indicated on the
> > > label? They may have
> > > conservatively rated the unit and did not
> want
> > > nuisance blowing of the fuse.
> > > Solid state needs fast blow types for better
> > > attempt at protecting the unit.
> > > Either way if it has a bad short it should
> blow
> > > the fuse. Anyway ask for a
> > > lot more than you think will be needed, you
> can
> > > never have enough power.
> > >
> > > George
> > > Afana Electronics
> > > Moreno Valley, CA
> > > ----- Original Message -----
> > > From: "walter wood" <wwood_38478@xxxxxxxxx>
> > > To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
> > > Sent: Tuesday, May 04, 2004 7:54 PM
> > > Subject: [TechAssist] Need advice from
> > > engineering folks.
> > >
> > >
> > > > Watts divided volts equal amps.
> > > > 100 watts divided by 100 volts = 1 amp.
> > > > That's the way a broadcast engineer told me
> to
> > > > remember Ohms Law 40 years ago.
> > > > Now the reason for the question;
> > > > I have provided the main outdoor sound
> system,
> > > > gratis, for the last 3 years, for the Relay
> for
> > > > Life charity.
> > > > The local college provides the lights, and
> the
> > > > electric company puts a tempoary service at
> the
> > > > location.
> > > > We've never had enough electricity.
> > > > Thet are offering to put a permanent
> service
> > > there,
> > > > and want to know how much IS enough.
> > > > I measured the current through a 100 watt
> light
> > > > bulb, on normal line voltage and read 0.82
> > > amps.
> > > > That's about right as the voltage was up
> from
> > > the
> > > > example, therefore the amperage goes down.
> > > > I measured a 60 watt bulb and got 0.5,
> exactly
> > > what
> > > > it should be.
> > > > I then measured a Peavey Session 400 amp,
> and
> > > it
> > > > read 0.44 amps at idle, but it didn't take
> much
> > > > volume to raise the draw to 1 amp.
> > > > The back plate on this amp states 600 watts
> and
> > > 120
> > > > volts.
> > > > It is fused at 6 amps.
> > > > Following the formula, it should pull 5
> amps
> > > "maxed
> > > > out".
> > > > I know that's a lot of e-mail, but the
> question
> > > can
> > > > be answered yes or know.
> > > > "Will I be safe in requiring the amperage
> of
> > > all
> > > > the amps and effects, etc. to equal the
> total
> > > of
> > > > their fused ratings."
> > > > I would think that would be more than
> adaquite,
> > > but
> > > > I'm asking for the expert advice.
> > > > I intend to ask for much more because we
> see
> > > the
> > > > need getting larger in the future, and
> anyway,
> > > it's
> > > > impossible to know what kind of equipment
> > > everyone
> > > > will show up with.
> > > > The college already knows the requirments
> for
> > > the
> > > > lights.
> > > > TIA
> > > > Water
> > > >
> > > >
> > > >
> > > > =====
> > > > Walter Wood
> > > > Future Tech Home Center
> > > > 2786 Hwy. 43 N.
> > > > Lawrenceburg Tn. 38464
> > > > 931-829-3337
> > > > Fax 931-829-4044
> > > > mailto:wwood_38478@xxxxxxxxx
> > > >
> > > >
> > > >
> > > >
> > > > __________________________________
> > > > Do you Yahoo!?
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> > =====
> > Walter Wood
> > Future Tech Home Center
> > 2786 Hwy. 43 N.
> > Lawrenceburg Tn. 38464
> > 931-829-3337
> > Fax 931-829-4044
> > mailto:wwood_38478@xxxxxxxxx
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Win a $20,000 Career Makeover at Yahoo! HotJobs
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=====
Walter Wood
Future Tech Home Center
2786 Hwy. 43 N.
Lawrenceburg Tn. 38464
931-829-3337
Fax 931-829-4044
mailto:wwood_38478@xxxxxxxxx
__________________________________
Do you Yahoo!?
Win a $20,000 Career Makeover at Yahoo! HotJobs
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