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O2 amp Australian parts GB

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#121
musical said:
I may be able to help. What is the current rating or wattage required?
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I believe it needs to suit the following requirements:
Input: 240v AC (dah )
Output: 14 - 16 V AC and 400 mA or higher

From the O2 Details page:
AC Wall Transformer – There has been some confusion over the wall transformer and it’s a critical component. Most wall transformers put out DC but the O2’s power supply requires at least 13.5 volts AC. The ideal transformer would be rated at 14 - 16 VAC and 400 mA or higher. In North America the Triad WAU12-200 from Mouser is rated at 12 volts but is really about 13.5 VAC with no load, and on normal 120 volt line voltage works fine for anything but full power sine wave testing or driving rare low impedance power hungry cans. If your line voltage is below 117 VAC or 235 VAC, and/or you plan to drive difficult low impedance headpones (i.e. HiFiMan planars), I would suggest a 14+ VAC transformer at 400+ mA. The best Mouser transformers are the WAU16-400, 412-218054 or WAU16-1000 CUI. But those are more expensive than the WAU12-200. The WAU20-200 also works for higher impedance headphones. At least some European 230 volt input 12 VAC output transformers only measure around 11.5 to 12 volts on normal line voltage and won’t work (especially if designed for halogen lights). You can also change the power jack to a 5.5mm x 2.5mm version if needed to match the plug of different wall transformers.
Click to expand...

EDIT:
hochopeper said:
The next best I can find is altronics one that I posted when we were looking for more volts a while back - Altronics - Your One Stop Audio Visual & Electronics Supplier
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Looks like their shop is right next to my work (Balcatta WA), but even if I could pick 30 of them at an allright price, what then?
Altronics - Your One Stop Audio Visual & Electronics Supplier
 
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#122
WES components may also be an option if 1000mA 12V is ok. not sure of any quantity discounts but the price in their catalogue is $13.75 with a 2.1mm plug part # ACA1210.

They also have a 16V 1500mA with wire termination (no plug) for $12.50 (so you may need to add a plug). part # ACA1615Q

Note I've no interest in the 02 group buy but thought I'd throw that in there in case it helps.

Tony.
 
#124
Hi!

I just wanted to say that I (and I'm sure a couple of others in the group buy) are new to diyaudio and I jumped onto this because it seems like the ideal project to start with! I've looked at various kits, but this one is battery powered and thus quite safe, it's cheap, not made with esoteric parts, and most importantly the motivation to make it is there because it should (hopefully) be a great amp!

My only request is that when the parts get shipped out, if someone has any time, it would be greatly appreciated by myself (and probably many others) if someone could do a build guide with pictures on diyaudio.

I'm sure it would be a useful reference that could be "stickied" or linked to from elsewhere, perhaps including Rocket Scientist's blog, and would be a great motivator for more people to take that first big step past just soldering a few cables back together! 🙂

Thanks!
Taz.
 
#125
While not specifically for this build, I would recommend having a look at build guides for other DIY projects. Some of the best in the business are put together by a man named Tom and are located here:

DIYForums.org

You'll learn some good practices - work from parts with the lowest to highest profiles on the board, and work from the middle of the board outwards.

You'll also learn some techniques like cleaning the board and such.

In addition to some common sense, like check that you have the correct part twice or thrice - then solder.

If you want to watch some videos on soldering, you'll find some here:
Tangent Tutorials

Best of luck.
 
#126
BlueFusion said:
Edit edit: I have enough money spare to order parts for these three regardless - therefore if they don't pay up there will be the following available (including surplus from elsewhere in my orderings):
3 components kits - 3 extra PCBs - 10 batteries - 3 enclosures - 1 wallwart - 3 front panels - 3 resistor kits
I'd like to sell these off as they represent funds that I will have invested into this myself that I could use back. 🙂
Click to expand...

Thanks BF, I would be interested in 1x Component Kit. Please PM me if one becomes available.
 
#130
Hey guys,
I am just curious as to where everyone buys there components from. Especially for this project, some parts are quite difficult to find. Mouser has a huge postage and handling charge.
I have sent a list to Semico to see if they can help, they have everything in stock apart from some of the resistors, just wondering if anyone has used this company before. I have searched through Altronics WES and a few others including element 14, it's hard to find one place that stocks it all.
Archie
 
#131
Archie, You can add RSAustralia to that list. I usually find I have to buy some stuff from Element14 and some from RSAustralia. RS is still offering free australia wide delivery for online orders (Element14 doesn't seem to have the banner up any more so may no longer be doing free shipping).

I also buy some of my stuff from PartsConnexion in Canada, but the shipping can be a killer. If your weight is under 250g (Including the packaging) then shipping will only be $9.95 US. 250-500g and it will be around $18 go a few grams over 500g and suddenly you are up to $36.00. The problem is they don't tell you the shipping cost before they have packed and sent it so it is a bit of a gamble. My last order was 520g so I paid an extra $18 for what could easily have been removed from the pagaging (just a little less bubble wrap) to get it under 500g 🙁

Tony.
 
#137
I have paid Rowan (BlueFusion) on September 25, 2011.
Already 37 days without any news.
Any goods that have been ordered?
When the goods are about to arrive?
I think if you order through Mouser or another company, they will certainly let you know when goods will be sent.

Is it OK if I feel a bit worried?
Moreover, I am not from Australia which is close to the location of Rowan.

Is it just me who feel worried?
 
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