[TechAssist] Re: Need advice from engineering folks.
- From: "George" <grndmstrg@xxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 5 May 2004 00:05:26 -0700
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!?
> Win a $20,000 Career Makeover at Yahoo! HotJobs
> http://hotjobs.sweepstakes.yahoo.com/careermakeover
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
>
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
