Amiga 4000 Paula Audio - Page 2

CU_AMiGA · 22 February 2007, 18:58

hhmmm looked at keropi method again. It looks a very good one!

2 questions though:

1) Instead of buying these 2 items:

ATX-to-A4000 power converter
ATX Power Switch

Wouldn't it be more convenient and cheaper to just have this:

Amiga A4000 ATX PSU Adapter Cable with Switch

2) What type of ATX PSU would i need? Am slightly confused here. Anyone can provide an ebay linky?

Regards

keropi · 22 February 2007, 20:20

I have both switches, the elbox amigakit.com has is a newer version (I guess) and it works flawlessly , both behave like u have a normal A4000 PSU on.... the elbox is more expensive, as it is obviously of greater quality... plus u need the switch too!
you need a micro ATX psu like THAT

CU_AMiGA · 23 February 2007, 12:12

Hi keropi

So would i get the 2 items you stated or would the item i linked be just ok for the job? Could you please link a suitable micro atx psu from the uk ebay? I am not too sure of the dimensions. Would it be screw-to-screw compatible?

Regards

keropi · 23 February 2007, 12:57

you need either the elbox one + the switch _or_ the simpler one...
the mATX psu's I have seen are screw compatible (only the upper 2 screws though) and HERE is a pricey UK suitable psu....

CU_AMiGA · 23 February 2007, 13:04

Cheers keropi i will ake note of that and get to work onit next week.

CU_AMiGA · 25 February 2007, 13:16

hi keropi forgot to ask where can i get one of them 80x80 fan thing from?

CU_AMiGA · 25 February 2007, 18:34

HMMM just done some tests and got some frightening results. I used me flickermagic and bmon instead of the picasso iv. I unplugged the hd and cd rom. I booted up the cover disk with octamed tunes and i seem to only get audio out put from L (left side). I also tried other apps that ouputs sounds and i get the exact same result everytime. Now when i put my picasso back in instead of the flickermagic and bmon (with the hd and cd rom unplugged as before) i seem to get proper sound again from L and R (both sides). Is my Paula buggered? Anyone got any suggestions?

Regards

CU_AMiGA · 28 February 2007, 09:46

I tried the A4000 out again. I worked out some of the problem. The RC/Phono cable i used for the R and L Paula output was broken so it caused one of the output to be not working. So Paula is indeed working ok. But this leads me back onto my original problem. If i connect evrything up including the picasso, cyberstorm and the hardware devices i get low volume sound or on just L or R, but if i just connect the picasso and cyberstorm i get perfect sound again. Is this due to lack of power in my psu?

Zetr0 · 28 February 2007, 13:48

Its either a lot of EMI noise or most likely a drop in current to the mobo from a some what taxed psu.

specificially when you reduce the power load.... the sound improves...

you can easly get a cheap atx and a converter from amigakit to run on your a4k... the best thing to do would be to try it... I know you are overtly worried when it comes to wire/splicing and soldering... but if you have a friend that knows a little i am sure they could help.

keropi · 28 February 2007, 13:52

the atx convertors are cool, finding a good atx psu is difficult!

Zetr0 · 28 February 2007, 14:03

whats wrong with a hipper?

a minor modification with a dremmel and it would fit!

550 watts of uber clean power

mmmmm

keropi · 28 February 2007, 14:07

the atx psu's I have tried failed to provide voltage above +4.9v for the 5v line... amiga crashes if it gets lower... especially ppc amigas! u may get away on a 060/zorro one though...

Zetr0 · 28 February 2007, 14:15

at the risk of spamming..

heres the PSU i would lump in it (minor 20 minute moddification to the chassis froma dremmel!)

http://www.scan.co.uk/Products/Produ...oductID=442822

and heres what i would consider as an opportunity for lumping in striaght away

http://www.scan.co.uk/Products/Produ...oductID=457258

you could always build a step down circuit fom the 12volt line using a couple of regulators! hell you could even use a couple of pots and make it vairable! that way you could step it up if your 5v line is under a lot of load!

Carcenomy · 28 February 2007, 14:33

If an ATX PSU is delivering less than 5V I'd say you've picked a cheap nasty one - as a PC dweeb I've seen all kinds of things, but an ATX PSU with lower than 5V on the 5V rail is usually reserved for cheap PSUs or underpowered PSUs.

But that's just my 0.02c.

Sounds like the mATX PSU mod might be your best bet here CU..

Zetr0 · 28 February 2007, 14:43

@Carcenomy

and worth every errr... almost a penny

keropi · 28 February 2007, 14:50

lol Zetr0 , I don't know of the first one, but I have the 2nd psu, the 300W Colours IT MicroATX PSU pPFC . I have tried it on my csppc/grex setup, and because the +5v line cannot deliver above 4.9v , the amiga crashes in aga stuff.

BinoX · 28 February 2007, 14:55

Quote:

Originally Posted by keropi

lol Zetr0 , I don't know of the first one, but I have the 2nd psu, the 300W Colours IT MicroATX PSU pPFC . I have tried it on my csppc/grex setup, and because the +5v line cannot deliver above 4.9v , the amiga crashes in aga stuff.

I've never seen a PSU deliver below 5v on the 5v line.. occasionally more (>_<), but never less (at least not any worse than 4.95).. but then, my PSUs are generally quite expensive ones (£100 500W jobbies)

keropi · 28 February 2007, 15:32

well, the mATX's I measured average at 4,81-4,83v so they are not good for amiga...

Zetr0 · 28 February 2007, 15:46

@keropi

from those measurements my friend.... no good for amiga... in truth i dont think its any good at all!

keropi · 28 February 2007, 16:16

yeah, it seems mATX psu's are very "flexible" in their ratings... not only they are kinda rare, but they are crap too!

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22 February 2007, 18:58	#21
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	hhmmm looked at keropi method again. It looks a very good one! 2 questions though: 1) Instead of buying these 2 items: ATX-to-A4000 power converter ATX Power Switch Wouldn't it be more convenient and cheaper to just have this: Amiga A4000 ATX PSU Adapter Cable with Switch 2) What type of ATX PSU would i need? Am slightly confused here. Anyone can provide an ebay linky? Regards

22 February 2007, 20:20	#22
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	I have both switches, the elbox amigakit.com has is a newer version (I guess) and it works flawlessly , both behave like u have a normal A4000 PSU on.... the elbox is more expensive, as it is obviously of greater quality... plus u need the switch too! you need a micro ATX psu like THAT

23 February 2007, 12:12	#23
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Hi keropi So would i get the 2 items you stated or would the item i linked be just ok for the job? Could you please link a suitable micro atx psu from the uk ebay? I am not too sure of the dimensions. Would it be screw-to-screw compatible? Regards

23 February 2007, 12:57	#24
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	you need either the elbox one + the switch _or_ the simpler one... the mATX psu's I have seen are screw compatible (only the upper 2 screws though) and HERE is a pricey UK suitable psu....

23 February 2007, 13:04	#25
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	Cheers keropi i will ake note of that and get to work onit next week.

25 February 2007, 13:16	#26
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	hi keropi forgot to ask where can i get one of them 80x80 fan thing from?

25 February 2007, 18:34	#27
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	HMMM just done some tests and got some frightening results. I used me flickermagic and bmon instead of the picasso iv. I unplugged the hd and cd rom. I booted up the cover disk with octamed tunes and i seem to only get audio out put from L (left side). I also tried other apps that ouputs sounds and i get the exact same result everytime. Now when i put my picasso back in instead of the flickermagic and bmon (with the hd and cd rom unplugged as before) i seem to get proper sound again from L and R (both sides). Is my Paula buggered? Anyone got any suggestions? Regards

28 February 2007, 09:46	#28
CU_AMiGA Banned Join Date: Dec 2003 Location: Exeter Age: 39 Posts: 970	I tried the A4000 out again. I worked out some of the problem. The RC/Phono cable i used for the R and L Paula output was broken so it caused one of the output to be not working. So Paula is indeed working ok. But this leads me back onto my original problem. If i connect evrything up including the picasso, cyberstorm and the hardware devices i get low volume sound or on just L or R, but if i just connect the picasso and cyberstorm i get perfect sound again. Is this due to lack of power in my psu?

28 February 2007, 13:48	#29
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	Its either a lot of EMI noise or most likely a drop in current to the mobo from a some what taxed psu. specificially when you reduce the power load.... the sound improves... you can easly get a cheap atx and a converter from amigakit to run on your a4k... the best thing to do would be to try it... I know you are overtly worried when it comes to wire/splicing and soldering... but if you have a friend that knows a little i am sure they could help.

28 February 2007, 13:52	#30
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	the atx convertors are cool, finding a good atx psu is difficult!

28 February 2007, 14:03	#31
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	whats wrong with a hipper? a minor modification with a dremmel and it would fit! 550 watts of uber clean power mmmmm

28 February 2007, 14:07	#32
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	the atx psu's I have tried failed to provide voltage above +4.9v for the 5v line... amiga crashes if it gets lower... especially ppc amigas! u may get away on a 060/zorro one though...

28 February 2007, 14:15	#33
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	at the risk of spamming.. heres the PSU i would lump in it (minor 20 minute moddification to the chassis froma dremmel!) http://www.scan.co.uk/Products/Produ...oductID=442822 and heres what i would consider as an opportunity for lumping in striaght away http://www.scan.co.uk/Products/Produ...oductID=457258 you could always build a step down circuit fom the 12volt line using a couple of regulators! hell you could even use a couple of pots and make it vairable! that way you could step it up if your 5v line is under a lot of load!

28 February 2007, 14:33	#34
Carcenomy Registered User Join Date: Nov 2006 Location: Invercargill, New Zealand Age: 39 Posts: 20	If an ATX PSU is delivering less than 5V I'd say you've picked a cheap nasty one - as a PC dweeb I've seen all kinds of things, but an ATX PSU with lower than 5V on the 5V rail is usually reserved for cheap PSUs or underpowered PSUs. But that's just my 0.02c. Sounds like the mATX PSU mod might be your best bet here CU..

28 February 2007, 14:43	#35
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@Carcenomy and worth every errr... almost a penny

28 February 2007, 14:50	#36
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	lol Zetr0 , I don't know of the first one, but I have the 2nd psu, the 300W Colours IT MicroATX PSU pPFC . I have tried it on my csppc/grex setup, and because the +5v line cannot deliver above 4.9v , the amiga crashes in aga stuff.

28 February 2007, 15:32	#38
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	well, the mATX's I measured average at 4,81-4,83v so they are not good for amiga...

28 February 2007, 15:46	#39
Zetr0 Ya' like it Retr0? Join Date: Jul 2005 Location: United Kingdom Age: 49 Posts: 9,768	@keropi from those measurements my friend.... no good for amiga... in truth i dont think its any good at all!

28 February 2007, 16:16	#40
keropi . Join Date: Oct 2004 Location: Ioannina/Greece Posts: 5,040	yeah, it seems mATX psu's are very "flexible" in their ratings... not only they are kinda rare, but they are crap too!

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