[TechAssist] Re: Need advice from engineering folks.
- From: "Hoyt's TV" <hoytstv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 5 May 2004 10:28:51 -0400
Walter, I'd want to add 30% to the fused ratings if you don't expect any
changes in the near future.
My experience has been that you can never have enough sound power to satisfy
the users. They are always going to want bigger amplifiers and more power.
I did the sound system for a drag strip for many years. The announcer was
never happy, and expected to be heard over the sound of a pair of fuel cars
running. The manager would be unhappy if he got a complaint from a driver
who missed his class call because there was a funny car pitted next to them
that was running when the call was made.
Russ Hoyt
Hoyt's TV
Exeter, NH
----- Original Message -----
From: "walter wood" <wwood_38478@xxxxxxxxx>
To: "Tech Assist" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, May 04, 2004 10:54 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
>
>
>
>
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