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Guitar Repair and Maintenance
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Topic starter
19/02/2013 12:00 am
On lead channel if the Input Level pot is turned up past 6, it starts whistling. Guitar plugged in or not, playing at same time or not.
The pitch changes (drops) slightly as you wind it up to full vol. Have checked all capacitors and resistors around V2, and have swapped out the valves with several others (all supposedly Low Microphonic). Not started or changed by physical excitation ( does it even with dummy load)
Appreciate any suggestions.
geoff
