Anyone know of a quick trick to change a TRS jack into a TR jack? Would save me a trip to the store.

Jun 5, 2005
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Title says it all. I have a sort of one-off thing I'm trying to do and this guitar pedal won't turn on if I plug a TRS end into it. Needs to be TR. Is there something that's like... the opposite of electrical tape? Like a conducive adhesive maybe?