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Topic: Match Box Batt. Eliminator? [close please] |
Jerry Overstreet
From:
Louisville Ky
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Posted 14 Dec 2018 11:17 am |
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Any reason this won't work? Add 2 battery snaps to connect wiring to existing on board snaps. Install power jack in case. Tie snap leads together, maintaining polarity and connect to add on jack terminals for use with 18v wall wart.
Last edited by Jerry Overstreet on 15 Dec 2018 8:34 am; edited 3 times in total |
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Bill Burch
From:
California, USA
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Posted 14 Dec 2018 11:30 am
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Two things I can think of:
• Have you traced the circuit and verified that the two batteries are hooked up in series to give 18v operating voltage or do they provide 9v to different circuits?
• Introducing a wall wart could potentially bring noise (including ground loop hum) into the signal chain.
Bill |
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Jerry Overstreet
From:
Louisville Ky
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Posted 14 Dec 2018 11:34 am
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Yes, the circuit board has 18v, at the terminating point.
Noise would likely depend on the power supply used and I have several, both reg. and un-reg. |
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 14 Dec 2018 12:39 pm
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I wouldn't trouble myself.
Those batteries last forever. 
Erv |
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Jack Stoner
From:
Kansas City, MO
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Posted 14 Dec 2018 1:55 pm
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There is less electronics in that than a Goodrich MatchBro and the two 9VDC batteries in it will last for a year's use.
Only thing I would do is add a power on/off switch, like I did for my MatchBro. Find the lead that goes to the input jack for the battery (ground) connection. Put the on/off switch in series with that lead. Then either the on/off switch or unplugging the guitar cord from the input will power it off. Actually, with the on/off switch you can leave the guitar cords connected and power it off with the on/off switch. |
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 14 Dec 2018 2:01 pm
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Jack,
Yes, I have a 6A Match Box and that didn't come with an on/off switch so I put one on it.
I forget the last time I had to change batteries. 
Erv |
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Jerry Overstreet
From:
Louisville Ky
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Posted 14 Dec 2018 2:38 pm
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I know about adding the on/off switch, but thanks for the instructions, and I'm aware of the battery life expectancy. I just want to eliminate them and leave the wiring intact for possibly re-using batteries in the future.
I am posing the question about this operation to those knowledgeable electronics folks who might know of issues with doing it such as Bill replied.
I have a dozen or so devices that use 9v batteries. It may not matter much to you guys that have deep pockets, but they all add up and it's a chore keeping time intervals. So, I'm probably going to try this and see how it works. |
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Josh Yenne
From:
Sonoma California
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Posted 14 Dec 2018 10:35 pm
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| Ummm. Ya. WhT the others said they last forever. Makes no sense. I love my 7a |
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 15 Dec 2018 7:52 am
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Yes, just another wall wart to fool with.
Erv |
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Jerry Overstreet
From:
Louisville Ky
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Posted 15 Dec 2018 8:38 am Please close this topic
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| Never mind. If anyone else has any info that's actually useful and/or relevant to this operation feel free to send me PM, if so inclined. |
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Pete Burak
From:
Portland, OR USA
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Posted 15 Dec 2018 9:10 am
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I use a multi-attatchment wall-wart from the hardware store. I drilled a small hole in the MXR for the 9-volt clip to pass thru (held tight with one wrap of electricle tape).
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