Hi Fred,
as an addition to my previous post. Remove the felt that's
muting the duplex, Lift the strings both, in from and to the rear of the
of the forward part of the resonator. Move the strings up scale about the
width of a string and, fudge relocate hammers.
Another partial solution is to put a small dab of PVCE glue on the string
in the forward duplex section. It will reduce the noise, but not kill the
detuned duplex.
Regards Roger
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