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Topic: Home made AB box |
Larry Behm
From:
Mt Angel, Or 97362
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Posted 8 Aug 2006 3:52 am |
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I wanted the ability to switch from my tuner (Stroboflip) to my amp so I could tune in the middle of the song and not be heard.
From Radio shack
1. Small project box
2. 3 input jacks
3. 1 on-on mini switch
4. Velcro strips
From Steel acceccory suppliers, the Bill Lawrence leg clips.
Input 1 + leg to the center leg of switch, the + legs of the 2 output jacks to the 2 outer legs of the switch. Wire all of the grounds together and tuck into box.
A new DOD stop box costs $40, but what fun is that? I also included 2 inputs for 2 insturments with another switch prior to the above set mentioned. What would that cost to buy at GC
Larry Behm |
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Smiley Roberts
From:
Hendersonville,Tn. 37075
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Posted 8 Aug 2006 5:15 am
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| Quote: |
| 3. 1 on-on mini switch |
The switch should be a DPDT type switch. The switch will have 6 lugs. 2 for left,2 for right,& 2 for center. The center would be your guitar input,the L. & R. would go to your amp/tuner.
(DPDT = double pole-double throw)
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~ ~
©¿© It don't mean a thang,
mm if it ain't got that twang.
[This message was edited by Smiley Roberts on 08 August 2006 at 06:17 AM.] |
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 8 Aug 2006 5:54 am
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I saved myself the trouble and just bought
myself a "JerryRig" from a Forum brother.  |
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Gareth Carthew
From:
West Sussex, UK
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Posted 9 Aug 2006 7:12 am
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As Smiley says, better to use a DPDT switch and keep the grounds for each amp seperate.
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John Macy
From:
Rockport TX/Denver CO
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Posted 9 Aug 2006 7:41 am
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Though I am extemely adept at building stuff like this, I also use one of Jerry's "Jerryrigs". Well made, and a lot more effective timewise for me...  |
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John Bechtel
From:
Nashville, Tennessee, R.I.P.
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Posted 9 Aug 2006 6:31 pm
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How do you keep ‘Grounds’ seperate? Ground is common! I'm just aXing as a dummy, when it comes to electronics! One output jack goes to the v/pedal and on to the Amp. and the other output jack goes directly to the tuner and the only wire that changes is the Hot~Lead from the steel!  They are never both hooked up at the same time! I've built several of these boxes for people that want to switch from Steel to Lead~Guitar, using the same v/pedal to the same Amplifier. One person is Fred Newell, with Porter Wagoner! He's used it for years and recently had me to build a spare for him! I also, btw; added a Boo~Wah Button to the new one!
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“Big John”
a.k.a. {Keoni Nui}
Current Equipment
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Jack Stoner
From:
Kansas City, MO
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Posted 10 Aug 2006 1:48 am
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| John, the boxes I've built also have common grounds and I've never had a ground loop hum problem. |
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Larry Behm
From:
Mt Angel, Or 97362
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Posted 10 Aug 2006 3:40 am
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John B what is a Boo Wah button?
Larry Behm |
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Ray Minich
From:
Bradford, Pa. Frozen Tundra
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Posted 10 Aug 2006 5:14 am
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What? No active components? Way too simple... You need a half dozen op-amps, some gain circuits, some controls so you have some knobs (the $485 flavor), an indicator lamp, a VU meter, and last but not least a wall wart that needs a couple of milk bottle sized filter caps to clean it up.
Should fit in a cabinet about the size of a small furnace.
[This message was edited by Ray Minich on 10 August 2006 at 06:15 AM.] |
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 10 Aug 2006 7:23 am
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| Ray, don't forget one of those Silver Rock Signature hi-fi knobs!! That would really put the icing on the cake! ha! |
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Gareth Carthew
From:
West Sussex, UK
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Posted 10 Aug 2006 4:34 pm
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You keep grounds seperate by using a DPDT switch and not only switching the "hot" or "signal" from the guitar between outputs A and B but also switching the ground (or "screen") between the outputs using the other set of switch contacts.
Most of the time there may be no ground loop problems so perhaphs not totally necessary but it's good practice to keep each amp's ground to its-self in this manner anyway.[This message was edited by Gareth Carthew on 10 August 2006 at 05:36 PM.] |
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John Bechtel
From:
Nashville, Tennessee, R.I.P.
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Posted 10 Aug 2006 7:30 pm
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Larry Behm; If you’ll CHECK HERE, you'll find an explaination about the Boo~Wah Boxes that I've been building for many Forumites and others! Thanks,
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“Big John”
a.k.a. {Keoni Nui}
Current Equipment
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Mike Wheeler
From:
Delaware, Ohio, USA
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Posted 11 Aug 2006 4:21 am
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| Gareth, you're logic is good, but for audio applications you should then specify a "make before break" switch configuration, IMHO. |
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Jack Stoner
From:
Kansas City, MO
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Posted 11 Aug 2006 4:33 am
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The switching of the hot and ground (earth) lead is nice but really not needed. I've never run into a problem switching to devices (guitars) to one amp.
Also, you need a metal case for the switchbox to shield the audio and that must be grounded at all times. You can use "insulated" type jacks but you still need a ground to the metal enclosure. |
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Dave Potter
From:
Texas
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Posted 11 Aug 2006 5:17 am
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| Quote: |
| If you’ll CHECK HERE, you'll find an explaination about the Boo~Wah Boxes that I've been building for many Forumites and others! |
I found the image, but didn't see an explanation anywhere. |
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Bob Tuttle
From:
Republic, MO 65738
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Posted 11 Aug 2006 6:58 am
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| Dave, I believe the boo-wah effect is like turning a tone control all the way on bass, then all the way on treble. (boo-wah) The switch on the box does it instantly. Push the switch, all bass. Let it up, all treble. I saw several of these effects installed between the necks on Fender, multi-neck steels back in the 1950s. |
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John Bechtel
From:
Nashville, Tennessee, R.I.P.
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Posted 11 Aug 2006 4:36 pm
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There you go! You got it Bob! Some guys refer to it as a Speedy West Type Effect! [What do you mean? “Who was Speedy West?”]
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“Big John”
a.k.a. {Keoni Nui}
Current Equipment
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