Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: wolf_papa on September 28, 2019, 11:28:29 am
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The title really says it all - I have some of the old style Marshall 4 lug input jacks that I would like to use, but I don't know how to wire them. Is there really any advantage to using them versus the standard Switchcraft jacks?
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I told the Ducks to find "wiring Marshall input jacks"
found this, got bored, quit :icon_biggrin:
http://forum.cakewalk.com/Why-do-old-Marshall-heads-have-4-inputs-How-to-jump-amp-channels-m1564051.aspx
I prefer switchcraft hands down, you can see what's up, all metal, easy to clean n tension, only down-side if you want isolated, plastic is easier
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Look here...
https://el34world.com/charts/CommonHookups.htm
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And here's how to do it if the mixing resistors are not mounted on the jacks. The green wire goes to chassis ground. The two violet wires go to the two mixing resistors.
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> switchcraft hands down, you can see what's up
Everything is visible on the plastic jacks also. Except it is visible on the side away from the lugs so you have to keep your head straight.
There's an arm which contacts the plug, and a contact which is made when plug is NOT in. For sleeve, tip, and ring if it is a 3-contact type (stereo or pedal input, not needed at an amp input).
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so you have to keep your head straight.
:laugh:
Ain't happnin, got screwed on backwards early in life :icon_biggrin:
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thank you all, I appreciate it very much