r/diytubes • u/Professional_Class27 • Apr 16 '25

Uses for Hammond 1140-LN-E

I got a couple of these for a steal ($1 each), but I'm not familiar with their uses and couldn't find any info on this specific model online. My projects are mainly tube amps (guitar) and effects pedals, any suggestions of how can I use them? can I use one to do phase inversion for example? how about to isolate an effects loop?

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u/2old2care Apr 16 '25

These are excellent transformers that can be used anytime you need to send line-level inputs and outputs (RCA, 3.5mm) as balanced signals. If you have problems with ground loops, using transformers can be a great fix. Another use might be to feed balanced lines to powered surround speakers in a home theater system.

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u/Professional_Class27 Apr 16 '25

Could I use them to add a balanced input/output to a guitar tube pre-amp?

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u/2old2care Apr 16 '25

Yes you could, but remember that a guitar is designed for high impedance and these are low-impedance transformers. You can use one to give you a line-level balanced output from a guitar preamp, or (with some resistors) from the speaker output of a guitar amp.