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Laurie
Double Platinum Member
Canada
4854 Posts |
 Posted - 09/18/2008 : 04:34:26
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Welcome stevedlcs!
Not sure what the 'offical line' is from Boss (anyone know?), but the diode/resistor jumpering is what we all do.
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/18/2008 : 10:36:00
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Hi stevedlcs
Welcome to the forum from Australia.
It's not always a 470 ohm resistor, but it is always a low value.
Have you read the article by Stinkfoot,
regarding using ACA pedals with a PSA, in a daisy Chain?
It's back in the main pedals section, before the forum.
Regards Dr. Bob |
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blueswah
Copper Member
USA
23 Posts |
Posted - 12/03/2008 : 02:45:15
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quote:
Originally posted by RonNovy
quote:
Originally posted by ChristoMephisto
On the Ce-2, jumper D5 and R52 470ohms,
Not sure which ones it is for the HM-2, at the moment.
Some suggest to leave the diode in for protection
Arg! If you jumper D5 make sure you don't have a battery plugged in while the power adapter is plugged in...
And what is this about R52 to 470ohms?
Why?
Is this true for any other early pedals? |
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copper
Bronze Member
USA
73 Posts |
Posted - 01/03/2009 : 00:24:52
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Yeah, having a battery and adapter plugged in at once won't do any damage. If you plug in the adapter, it automatically disconnects the battery.
And there is also a neater way to remove the diode and resistor. All you need is a short wire and you only need to solder twice instead of 8 times.
1. There is a wire that comes from the minus of the DC jack and meets the PCB. We'll call this spot "A"
2. There is also a wire coming from the center ring of the input jack (not the ground or tip). If you can't figure out which is the ring, trace from point A through the resistor and diode and you end at the solder joint that connects the wire to the ring. This is called point "B"
3. Now run a short jumper/wire from point A to B.
That's it!! Now your 12v Boss will now take 9v!
If that doesn't make sense, just ask and I'll try to explain it better. Or just give me a schematic of your pedal and I'll tell you what to do. |
Edited by - copper on 01/03/2009 00:30:24 |
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blueswah
Copper Member
USA
23 Posts |
Posted - 01/08/2009 : 19:42:19
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Thanks copper.
In another thread about my DM-2 I posted this pic of the jumper (points "A" to "B") fix. Red line showed where to put the jumper on the DM-2.
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Edited by - blueswah on 01/08/2009 19:43:08 |
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copper
Bronze Member
USA
73 Posts |
Posted - 02/07/2009 : 00:59:21
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| Oh, and you might want to either snip or unsolder a leg of either the diode or resistor just to make absolutely sure that it is out of the circuit. |
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guitarMAD
Copper Member
United Kingdom
12 Posts |
Posted - 04/01/2009 : 00:38:54
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| Is it possible to power TWO ACA type pedals via 'daisychain' method by just using a single PSA TU-2? or would that be too much of a drain??? |
Edited by - guitarMAD on 04/01/2009 00:47:14 |
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guitarMAD
Copper Member
United Kingdom
12 Posts |
Posted - 04/01/2009 : 19:03:04
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quote:
Originally posted by guitarMAD
Is it possible to power TWO ACA type pedals via 'daisychain' method by just using a single PSA TU-2? or would that be too much of a drain???
In answer to my original question you can, I have just tried it and they both work perfectly. |
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JonnyPSJ
Copper Member
3 Posts |
Posted - 11/02/2009 : 01:10:05
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quote:
Originally posted by stinkfoot
ACA pedals produced prior to 1997 require 12 volts DC on the adapter input. The 12 volts are then reduced to about 9 volts inside the pedal, via a resistor and a silicon diode on the negative side of the power supply input.
To make your old-style ACA pedal work with a power supply, you can either:
[list]run it off a separate 12 volt supply (don't go out and buy the current Boss ACA adapter, though, as it too was changed to 9 volts in 1997)
/Andreas
Hello All, I'm new here.
I have a Boss SD-1 that was definitely made before 1997, and I've just bought a (Masterplug http://www.argos.co.uk/static/Product/partNumber/9829701/Trail/searchtext%3EADAPTER.htm) Multi-volt adapter - can switch voltages anywhere from 3v to 12v, and can change the polarity.
I've had a look at:
quote:
What's the difference between ACA and PSA?
If it says "ACA" on the bottom, and the PSA adapter doesn't light up the LED properly (or the pedal isn't one of those listed above), it wants 12 volts unregulated power to work properly.
So my question is:
How do I know if my choice of adapter is regulated or unregulated?
Thanks for any help!
Jon |
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bossarea
Forum Admin
United Kingdom
3652 Posts |
Posted - 11/02/2009 : 16:18:26
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Hi JonnyPSJ and welcome to the forum.
I have no idea if the Argos adapter is regulated or not but the most important thing is that it powers up your SD-1. As long as the polarity is correct, there's no danger that you damage your pedal.
Does your LED light up when you plug it in? |
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JonnyPSJ
Copper Member
3 Posts |
Posted - 11/02/2009 : 23:12:20
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quote:
Originally posted by bossarea
Hi JonnyPSJ and welcome to the forum.
I have no idea if the Argos adapter is regulated or not but the most important thing is that it powers up your SD-1. As long as the polarity is correct, there's no danger that you damage your pedal.
Does your LED light up when you plug it in?
Hi & thanks!
I haven't tried plugging it in yet...! After reading all the info here about BOSS adapters, I was too confused by the whole issue to want to risk plugging it in!
I read this: http://www.apogeekits.com/power_adapter_selection.htm
which, if its right, seems to suggest that a switchable voltage adapter is more likely to be a regulated one. I cant find any useful info on the adapter manufacturers site.
I got the idea from reading the 'Whats the difference between ACA & PSA' article that the unregulated bit was important,
quote:
Boss decided to run their adapters at 12 volts, and then use a resistor (usually 470 ohm) and a silicon diode inside the pedal to reduce the incoming voltage.
So I don't know if I should use the adapter I've got (assuming that it is regulated) at 12v or 9v?
The current supplied at 9v is 1A, and for 12v is 0.9A, don't know if that makes any difference to anything...?
Also read this in another thread, so now hoping that mine adapter is regulated!
quote:
Dr. Bob:
The regulated power supply will also have, DRAMATICALLY LOWER hum & noise.
Thanks for your help!!!
Jon |
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moreyag
Copper Member
USA
6 Posts |
Posted - 11/05/2009 : 22:58:13
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Hi all - newbie Boss owner here..just bought a CS-3 on eBay (MIT /1991 serial#/ ACA / black label) and i'm reading here that there's an easy fix to convert it from 12V to 9V, but i'm not seeing exactly where to do it on a CS-3. Also, and this might be stupid, but would it change the "tonal color" of the unit doing so? I have a couple of 12V power supplies (i have to check the current rating) so should i use one of those?
Thanks in advance for any and all help
Best regards
moreyg
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Laurie
Double Platinum Member
Canada
4854 Posts |
Posted - 11/05/2009 : 23:08:12
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quote:
Originally posted by moreyag
Hi all - newbie Boss owner here..just bought a CS-3 on eBay (MIT /1991 serial#/ ACA / black label) and i'm reading here that there's an easy fix to convert it from 12V to 9V, but i'm not seeing exactly where to do it on a CS-3. Also, and this might be stupid, but would it change the "tonal color" of the unit doing so? I have a couple of 12V power supplies (i have to check the current rating) so should i use one of those?
Thanks in advance for any and all help
Best regards
moreyg
It shouldnt change the tone. On the ACA CS-3, put a jumper as shown on the pic below:
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 11/06/2009 : 09:20:01
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Hi moreyag
Welcome to the forum from Australia.
Regards Dr. Bob |
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JonnyPSJ
Copper Member
3 Posts |
Posted - 11/06/2009 : 18:40:32
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quote:
Originally posted by bossarea
Hi JonnyPSJ and welcome to the forum.
I have no idea if the Argos adapter is regulated or not but the most important thing is that it powers up your SD-1. As long as the polarity is correct, there's no danger that you damage your pedal.
Does your LED light up when you plug it in?
Well it lights up, quite bright at 12v and not so bright at 9v
guess I'll stick with 12v, and I'll just keep hoping that if its a regulated adapter, that doesn't mean that anything will get fried!
cheers  |
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Topic |
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ACA pedal with PSA adaptor
