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Old 7th Dec 2017, 1:58 pm   #1
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Join Date: Nov 2003
Location: Bath, Somerset, UK.
Posts: 1,379
Default WS19 tuning trimmers?

Sorry to sound a dunce, but ever since I was at school over 40 years ago I have wondered what the four gas-tap like controls were for on each of the two tuning knobs on a 19 set. I imagine they are some sort of trimmer but I have never seen an operator adjusting them, what are they?
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