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pedals 4 pv
Platinum Member
Canada
1351 Posts |
 Posted - 01/03/2008 : 23:38:40
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The PSA-120 has been superceded by the PSA-120S. It's a real improvement over the PSA-120. It sits sideways on the powerbar, like a one-spot, and has 500mA of regulated, circuit protected output, with an input voltage of 100Vac to 240 Vac. But the best part is flexible lead wire ala the old ACA adaptors. Check it out:
http://www.rolandus.com/products/productdetails.aspx?ObjectId=911
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Edited by - pedals 4 pv on 01/04/2008 01:48:19 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/04/2008 : 01:05:17
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Hi pedals 4 pv & Guys
That new adapter looks like it's a switching type power supply.
I looked at the specs, but I didn't see the 100VA-240VAC input voltage, it just said 1170VAC.
The S in the PSA-120S, might mean switching?
Do you know what the plastic bit near the end of the cord is?
Other data found on the web.
Status light that flashes if there are grounding problems.
New design which does not cover adjacent power outlets.
Weight: 150 g, 6 oz.
Being so light (150g) it's definitely a Switching type adapter.
Regards Dr. Bob
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pedals 4 pv
Platinum Member
Canada
1351 Posts |
Posted - 01/04/2008 : 01:20:19
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Hi Dr. Bob and everybody
I had my ACA-120g fail on me, so I had to buy this one, and it says on the adaptor and on the box:
IN:100-240 V / OUT: DC 9 V 500mA
The plastic bit near the end of the cord is a housing for the rectifier and overload protection. There is also a little flag that says; BOSS PSA ADAPTOR |
Edited by - pedals 4 pv on 01/04/2008 01:31:38 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/04/2008 : 01:48:43
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Hi pedals 4 pv & guys
Thanks for the Info pedals 4 pv... I was wondering what the plastic bit was, I thought it might be a cable tidy of some type.
Did you manage to get the old one open?
We might be able to help you fix it...
Regards Dr. Bob |
Edited by - Dr. Bob on 01/04/2008 01:49:07 |
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pedals 4 pv
Platinum Member
Canada
1351 Posts |
Posted - 01/04/2008 : 03:40:16
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| I did get it open and posted on the other thread in mods & tech. Are the power outlets in Austrailia the same as here, except 240 volt, or are they a different shape, Dr. Bob? I know that Europe has different ones and I was wondering what you had in Oz., as you call it. |
Edited by - pedals 4 pv on 01/04/2008 03:46:17 |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 01/04/2008 : 04:19:30
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quote:
Originally posted by pedals 4 pv
I did get it open and posted on the other thread in mods & tech. Are the power outlets in Australia the same as here, except 240 volt, or are they a different shape, Dr. Bob? I know that Europe has different ones and I was wondering what you had in Oz., as you call it.
Hi pedals 4 pv
Please read your other thread;
I answered you over there in Tech & Mods.
Regards Dr. Bob |
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stinkfoot
Silver Member
Sweden
181 Posts |
Posted - 02/23/2008 : 14:48:55
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I know this is (or at least has the potential to be) a hot topic, but I don't see any way a switching type PSA can be called an improvement over the old one... sure it's 500mA instead of 200mA. But it's still a switching type adapter...  I refuse to let any adapter of that type even near my rig, having seen far too many pedals fried when a 1spot or Godlyke decides to die. Also (even though it's not the adapter's fault) in the event something goes bad in the pedal, causing it to ask the adapter to dish out all the current it has on tap, a switching type adapter (which usually has well over 1000mA on tap) can do far more damage than a 200mA PSA adapter. Kudos to Boss for staying at 500mA max here - that's at least something.
Also, I have pedals on my board that whine badly when powered from any type of switching supply, so for me it's no option. Time to stockpile the regular PSA...
/Andreas |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 02/23/2008 : 15:07:54
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Hi stinkfoot/Andreas & guys
I 100% Whole heartedly agree with you on this point.
Until recently,I used to repair (SMPS) Switch Mode Power Supplies for most of my day.
Small ones & real big high energy (mother)ones as well.
These can be deadly when they fail.
And they tend to fail in catastrophic ways, unless the start-up caps dry out first.
Never open one up to work on it-unless you REALLY KNOW WHAT YOUR DOING.
And have all the safety test equipment & discharge tools.
I once had one catch fire while on the bench, & it had at least 300mm-one foot high flames coming out of it...
Plus the switching frequencies can beat with the clock frequencies in digital gear, which is most likely one of the cause of the whining sound, some of us are getting.
Regards Dr. Bob |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 03/02/2008 : 20:15:13
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Amen! I wouldn't use anything but linear, proven "tractor technology" to power my pedals. Worst case failure voltage out of the linear (7809 based) supply in my board is about 14VDC - most pedals will survive that.
Laurie |
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pedals 4 pv
Platinum Member
Canada
1351 Posts |
Posted - 03/02/2008 : 21:02:31
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From the instructions printed on the PSA-120S box:
"This adaptor has built-in output current protection circuit." |
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 03/02/2008 : 21:27:39
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quote:
Originally posted by pedals 4 pv
From the instructions printed on the PSA-120S box:
"This adaptor has built-in output current protection circuit."
Yes but, yes but, yes but... if the whole thing lets go, what are the chances the overcurrent circuit survives and works if the regulation fails?
I know, I know - the over-current protection is there to protect stuff from overload when the adapter is working properly.
I still don't trust switch modes to power something that might not be able to be be replaced. Different story for my kids PC. If that blows up I get to buy a better one. Horses for courses I say.
OK <disengage> rant mode.
Laurie
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pedals 4 pv
Platinum Member
Canada
1351 Posts |
Posted - 03/03/2008 : 03:38:07
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quote:
Originally posted by lauries2
quote:
Originally posted by pedals 4 pv
From the instructions printed on the PSA-120S box:
"This adaptor has built-in output current protection circuit."
Yes but, yes but, yes but... if the whole thing lets go, what are the chances the overcurrent circuit survives and works if the regulation fails?
I know, I know - the over-current protection is there to protect stuff from overload when the adapter is working properly.
I still don't trust switch modes to power something that might not be able to be be replaced. Different story for my kids PC. If that blows up I get to buy a better one. Horses for courses I say.
OK <disengage> rant mode.
Laurie
I can realate totally. Sometimes I have dreams of my surge protector failing the instant before a lightning strike. Long odds, I know, but lightning makes me very nervous |
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Topic |
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New PSA-120 adaptor from Boss
