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HotCookCpl
Copper Member
USA
7 Posts |
 Posted - 09/26/2008 : 14:34:21
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I now have two Boss LS-2 pedals that I use as amplified switches for three guitars played at the same time. The just recently acquired the second pedal through an ebay auction. My original pedal is very quiet when I change modes via the foot switch. My newly acquired pedal (must be an older vintage) makes a popping sound when I step on the foot switch. This "pop" is similar to the pop heard when switching a mechanical switch on a microphone. Is this "normal" for earlier LS-2s? Can it be fixed or quieted? I do have a temporary work around but if I can get this fixed it would be really nice.
I'm an R&D tech in electronic engineering so I won't have any problems making mods or repairs. Thanks. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/26/2008 : 14:50:30
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Hi HotCookCpl
Welcome to the forum from Australia.
There is a similar thread running on the NS-2.
Regards Dr. Bob |
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Laurie
Double Platinum Member
Canada
4854 Posts |
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HotCookCpl
Copper Member
USA
7 Posts |
Posted - 09/27/2008 : 18:08:40
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OK, I spent more time investigating and it seems the problem is not with a specific LS-2 it is actually a problem for both LS-2s. The pop is minor, but, it's there. I guess I'm not going to worry too much about this, but if anyone has any suggestions of other things to look into it would be helpful. Oh, my TU-2 does the same thing but much quieter. It must just be part of the Boss design.
Things I've tried:
-Batteries instead of AC power supply.
-Rearrainged input power to try different connectors.
-Moved both LS-2s to different positions in the pedal chain.
-Happens on all outputs, "SEND A", "SEND B" and "OUTPUT".
-Removed mixer between pedals and amp.
-Tried different patch cords.
Nothing really helped. Thanks for any suggestions. |
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Dr. Bob
Moderator
Australia
6593 Posts |
Posted - 09/27/2008 : 18:41:36
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Hi HotCookCpl
Could it be an external problem?
I'm just thinking out loud here:
what about poor or no ground connections on the mains socket.
Try it on a different power point, or better still, at a friends place.
What about noise (induction) from some other bit of machinery - Gear?
Did you try it with a different guitar, some guitar are a real bugger for noise.
Weer the LS-2 noisy from the day you got them?
I really can't think of much else.
Perhaps some of the other guys with LS-2's will chime in here?
One other thing, I think the LS-2 use 4066 FET switch IC's
I recently had one of these go south in a Dean Markley Overlord III pedals.
It might be that one of the 4066's took a partial dive.
Take a look at TomCrays LS-2 internal pics here, about half way down the page:
http://www.bossarea.com/forum/topic.asp?TOPIC_ID=4147&whichpage=9
And what type-brand of power adapter are you using?
Regards Dr. Bob |
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HotCookCpl
Copper Member
USA
7 Posts |
Posted - 09/29/2008 : 14:56:46
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I'm wondering if it might be something external. Again, I'm not hugely concerned about the noise because it's not really loud, but I'm a bit of prefectionist and I can't just leave well enough alone sometimes.
The power supply is the Boss PSA-120 supply and I'm using it for all three of my pedals. I did try battery power instead of the supply and the noise was quieter (only slighty) which may be due to the available power of the batteries (they are a bit old).
Any other thoughts are most welcome. Thanks. |
Edited by - HotCookCpl on 09/29/2008 14:58:28 |
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LS-2 noisy when switched
