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PostPosted: Tue Jul 02, 2013 4:04 am 
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I know I should just do a simple wattage/voltage= amperage and figure this out. However, I want to make sure I do it right. I have several other things plugged into the same circuit in my studio and I need to know how much current the Tramp draws. So I figure I would ask here and get the correct answer.

How many amps (us voltage) does a Tramp draw? :?:


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PostPosted: Tue Jul 02, 2013 8:19 am 
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Quote:
for mains; use the VA rating of PT / the mains voltage to be used. to get VA rating add up VA of each of the secondaries. VA rating is Vrms * Irms. some mfg. give the PT VA rating, if they don't, calculate it.

i.e. fender twin -

640V x .5A = 320VA
6.3V x 5.5A = 35VA

total VA = 320VA + 35VA = 355VA

now calculate needed fuse size - 355VA / 120V mains = 2.95A - closest standard value is a 3A fuse. use a slo-blo type.

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PostPosted: Tue Jul 02, 2013 8:45 am 
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On idle or on max and playing it. I can plug one in and tell you what the idle AC current is.

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PostPosted: Tue Jul 02, 2013 4:17 pm 
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coco wrote:
On idle or on max and playing it. I can plug one in and tell you what the idle AC current is.


On Max playing it. I appreciate this. I know it is not much, but I want to know the max current draw so I can be sure and safe.

[[Edit: For Kurtives--thank you also for your formula--that also helps greatly. ]]


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PostPosted: Tue Jul 02, 2013 5:33 pm 
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http://www.p3international.com/products/p4400.html

http://www.jaycar.com.au/productView.as ... TID=1003#3

You can get one of these, or similar for about $30, plug it into the socket, plug your amp, or any other electrical device into it and it will tell you exactly how much juice is being consumed while that device is being used.

snowy


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PostPosted: Tue Jul 02, 2013 7:49 pm 
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We fuse the tramp at 1 amp, so certainly not more than that!

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PostPosted: Wed Jul 03, 2013 12:45 am 
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No457 Snowy wrote:
http://www.p3international.com/products/p4400.html

http://www.jaycar.com.au/productView.as ... TID=1003#3

You can get one of these, or similar for about $30, plug it into the socket, plug your amp, or any other electrical device into it and it will tell you exactly how much juice is being consumed while that device is being used.

snowy


Thanks. I ordered one for $22 online. Nice to have for gigs to make sure I know how much current different amps and pa's draw.

Thanks also to all who replied. The various replies have helped me be safe and make sure that the other amps and devices in my little studio are not drawing too much current for my breaker. I was always taught to keep the total draw to 80% of what the breaker allows. Don't want breakers to trip or to cause a fire.


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PostPosted: Wed Jul 03, 2013 8:50 am 
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That's a cool device. Where did you order it from in North America?

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PostPosted: Wed Jul 03, 2013 4:19 pm 
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coco wrote:
That's a cool device. Where did you order it from in North America?


Amazon.

Try this: http://www.amazon.com/P3-International- ... rent+meter


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PostPosted: Mon Aug 05, 2013 8:24 pm 
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Update. I got the P3 International Meter (see above) and finally got around to plugging my Tramp with a 6V6 tube into this voltage/amperage meter.

When I turn the Power Level (VRM) maxed out/up, it draws .30 amps (USA); with the Power Level all the way down, it only draws .14 amps. So the max amperage I am drawing is .30 amps. It is good to know this when gigging or rehearsing with others just so I/we know how much current is being drawn.

Really like having this meter around. Useful for Tramp or for projects around the home. Thanks Snowy for recommending it.


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