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| Thread ID: 61705 | 2005-09-13 22:55:00 | Determining a transformer requirements. | Nomad (952) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 388225 | 2005-09-13 22:55:00 | Hi, is there a way to determine which transformer I need regarding the load of the device. Let's say the device is a North American photo printer or a amplifier stereo deck. I could get the details from the manual or at the back of the unit then what do I do with it? I have not got the device yet... Thanks. |
Nomad (952) | ||
| 388226 | 2005-09-13 23:36:00 | You'll need to know the power consumption as well as the Voltage. Look for either the Watts or VA figure. Then you need a step down transformer for the voltage that can deliver at least that amount (and they aren't cheap). It's possible that something like the photo printer could have a universal power supply that will just need the appropriate mains plug or cord set. | PaulD (232) | ||
| 388227 | 2005-09-14 03:58:00 | Let's say the device is a North American photo printer or an amplifier stereo deck . An amp may well require considerably more power than a printer . These transformers are readily available in NZ from DSE & Jaycar (and others) with stock sizes . They are usualy rated in VA and depending on the device you would probably need either a 250VA or a 500VA, but an audio amp could require 1000VA or more . Why buy from the US when you can buy most of this stuff at competitive prices here, especially if you don't need a transformer? Prices at Jaycar are: 250 VA $155 500 VA $260 1000 VA $410 Rounded up to the nearest dollar . DSE equivalents $200/$280/$475 Cheers Billy 8-{) |
Billy T (70) | ||
| 388228 | 2005-09-14 04:38:00 | Of course not all watts are the same. I recently saw a stereo system with "6500 Watts" in huge type on the front. I'm sure that a 100VA transformer would have fed it without getting warm. (The "watts" were PMPO). Even better was a "sub woofer" "powered with Nuclear Fission". (According to the box, anyway, and who would argue with a marketer who can spell "fission"?.) That one would have powered the whole house. |
Graham L (2) | ||
| 388229 | 2005-09-14 05:21:00 | Of course not all watts are the same. I recently saw a stereo system with "6500 Watts" in huge type on the front. I'm sure that a 100VA transformer would have fed it without getting warm. (The "watts" were PMPO). Actually Graham, although I can see your tongue planted firmly in your cheek, it is best to stick to 115/230 volt input power to avoid confusing those who don't know the difference. As I pointed out in a previous post (pressf1.pcworld.co.nz) many moons ago, to determine with any accuracy the meaning of PMPO figures, you need to know the designer's hat and shoe sizes. Cheers Billy 8-{) :p |
Billy T (70) | ||
| 388230 | 2005-09-14 07:04:00 | Thanks for the help guys . Its still speculation . I could get them in Asia instead of N America so to avoid the power issue . With the amp, there are speakers and a woofer so the prices overseas are much less than here . I was just reading a brochure today at one of the appliance chain stores and their ones averaged around $1500 in the middle line . To make things a bit more harder to swallow, I need two transformers becos one for the woofer and one for the amp deck :eek: The woofer is a 350W, the deck is a 0 . 55W . The deck might be unamplified receiver . Regarding the smaller appliance, printer . Thats ok . . . printers are a bit more expensive here if you get the A3 ones . I plan to get inks and paper from abroad and do own printing now with digital photography, from a quality point of view and a enjoyment one . Also from a finance point of view when comparing to the labs offering ICC printer files . I am able to obtain used ones cheaper over there, furthermore that model is now just been replaced by a newer model so the price has been better too . These printers are not available in NZ easily used . Its a Epson 2100 (2200 in N America) . I then get to save 2/3 . Thanks again . Yes, the stereo thingy maybe I head to Asia instead :) |
Nomad (952) | ||
| 388231 | 2005-09-14 07:30:00 | Just one more question. On the back of my DVD player there is one woofer output and one digital output (digital and one other called analogue). Does the digital ouput include the woofer as well? I have seen some receivers/amps and they don't seem to have a woofer input. If the case is not. That means I need to plug the woofer to DVD woofer output. Meaning my TV/VCR/Sky does not use the woofer right? |
Nomad (952) | ||
| 388232 | 2005-09-14 08:29:00 | Don't worry, I read the manual. Digital output includes the speakers and the woofer. Cheers. |
Nomad (952) | ||
| 388233 | 2005-09-14 10:52:00 | OK, Nomad, Did you not get the information that Billy & Graham told you? You ask about "Transformer requirements" apparently to use 120v stuff here in NZ..It is the "Input power (va)" of the devices that you have to consider. Not the weird specs of woofer output etc. And why would you need two transformers? One to handle the total input power (va) of all devices should do. |
Bazza (407) | ||
| 388234 | 2005-09-15 00:30:00 | Yes, I went to the spec sheet and it said... Couldnt find the vA rating thou. The deck: USA/Canada: 120V 0.55A 50/60 Hz 33VDC 1.1A The speaker system: USA/Canada: 100-120V 50/60 Hz 350W Two plugs needed, one to power the woofer which is connected to 5 spkers and the other plug for the deck unit. I just thought maybe two device may overload or maybe the deck is less enof not to overload to say a 500VA transformer? Well, still looking, could get in Asia to avoid this issue altogether. |
Nomad (952) | ||
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