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Converting balanced audio output for an unbalanced input 5m away



Jan 1, 1970

We have a VT deck with balanced outputs (on XLRs) for audio. Thanks to help
from this NG I managed to build a simple volume control so we can leave our
powered monitor speakers (out of reach on wall-mounts) at max and control
the input from the desktop. I'm now trying to build some more functionality
into the same box.

I need to be able to feed a VHS deck which takes balanced inputs via a
Scart. I've found a couple of circuit diagrams on Jensen's website ( at ) but they require audio
transformers I can't seem to find in the UK - can anyone suggest a circuit
diagram that'll do the job with parts I can get from (say) Maplin in the UK?

Plus a quick question if I may - the writer of the article says that it's
best to stick the balanced -> unbalanced converter at the unbalanced end of
the cable because of capacitance on the line - while I understand it makes
sense to keep the line balanced for as much of the signal path as possible
(common sense), is there anything I can do to minimise the capacitance
effect mentioned? The signal, once unbalanced, has to go down around 5
metres of unbalanced shielded cable before it reaches the VHS machine.

Any thoughts appreciated.