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Post subject: DIY "Detaching" the Exp-1 switch
Posted: Mon Sep 28, 2015 12:12 pm
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Joined: Wed Mar 12, 2014 3:37 am
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I few months ago I had the idea of trying to detach the EXP-1 switch in order to be able to change between the volume mode and the expression mode without changing the throttle. This would be very useful as you would be able to change the volume, then change -for instance- the delay and go back to the volume without having to go to full throttle (and thus to the maximum or minimum delay or volume).

Because I didn't know if this was possible and if it would cause any issue, I googled it and I found that one Fender Forum User had already done it. This smart user (I can't remember his nickname) detached the switch, although my approach was to duplicate its function.
So, here I'll show how to do it.

Materials
    - Soldering irong
    - Male 1/4 jack plug
    - Female 1/4 mono jack socket
    - Momentary switch (always off switch)
    - Cable of two wires of about 10 cm
    - Drill
    - Screwdriver
    - Optional: multimeter to check everything is OK.

First of all you need to open the EXP-1 and, carefully so you do not accidentally hit anything, you have to drill a hole as big as you need so you can insert the female 1/4 jack plug.
Image
Image

Then you have to solder the two wires to the circuit board of the EXP-1 (view image). Here you have to very precise so you the wires do not make contact with anything but the pin. Then you just solder the wires to the female jack socket. It doesn't mind the order, but bare in mind that although some sockets have 4 pins, just two of them work. If you have a multimeter now it would be a nice moment to check all the connections. So, plug the male jack without the cover, and check the connection from the plug to the circuit board. Finally, I recommend you to cover the wires with some tape so they don't make contact with the iron case when you close it.

Image
Image


If you have bought a ready to go momentary foot switch with its own case (like I did), you will only have to solder the jack plug. However, you will find at least 3 wires but you only need two. To know which two, you can use a multimeter and look for two wires that pass the continuity test (this, its a close circuit) when you PUSH and HOLD the switch. If you do not have a multimeter, then you can use a light bulb and a battery and make a circuit so when you push and hold the switch the light goes on, but when you release it, it turns off. Now that you have the two wires, solder them to the male plug and you have finished!

Image

Here you can see the final result.

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Image

Hope you find it useful!

PD: if you want to see the photos in full size, go to http://postimg.org/gallery/3heb3ejow/


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