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DIY Stompboxes => Building your own stompbox => Topic started by: facon on April 16, 2014, 01:04:43 PM

Title: Which switching jack?
Post by: facon on April 16, 2014, 01:04:43 PM
I'd like to perform this mod on my MF-101: http://forum.moogmusic.com/viewtopic.php?f=3&t=9020 (http://forum.moogmusic.com/viewtopic.php?f=3&t=9020)

It looks incredibly simple, but I have never used a switching jack before and can't seem to figure out what I need to find. I'm looking for a Neutrik jack that will match the rest of the in/outs on the pedal. So, full threaded nose with black plastic nut. Is it a bridging, switching, half normal jack? What am I looking for here? Neutrik simply states that the jacks are switched or unswitched. I need the jack to complete the circuit as normal when unplugged. When plugged in, it will ignore the original input and send only what is sent from the plug.

http://www.neutrik.us/en-us/plugs-jacks/m-series/ (http://www.neutrik.us/en-us/plugs-jacks/m-series/)

Also, since the input will be a clean guitar signal, am I correct to assume that I'll need to connect the sleeve to ground?

EDIT: I think I have the hang of it. So, I would use a mono switched jack. Wire the circuit from the resister to TN lug of the jack. Wired the T lug of the jack to pad that the resister connected to before desoldering. Wire T of the jack to the ground on an input/output jack.
Title: Re: Which switching jack?
Post by: GGBB on April 16, 2014, 02:48:57 PM
I'm looking at 'Mono Switched' in this: http://www.neutrik.us/zoolu-website/media/download/2804/Jack+Circuits.  The drawing can be a little misleading I think, at least for me, so assuming:

'T' = Tip
'S' = Sleeve

Wire the circuit from the resistor to T lug of the jack. Wire the TN lug of the jack to pad that the resistor connected to before desoldering.  Wire S of the jack to the ground on an input/output jack.

In any case, tip goes to resistor, tip shunt goes to desoldered pad, sleeve goes to ground.
Title: Re: Which switching jack?
Post by: facon on April 16, 2014, 02:51:00 PM
Gotcha. Thanks! I had it backwards, since the triggered signal will be entering into the 100k resistor.