I have followed the calibration process in the service manual, and I can achieve very good results. However, when I switch the DE2 off, and then on again several hours later, the volt/octave calibration has slipped again. I retest only after the unit has been on for an hour or so, Also, the time taken for tuning to stabilise after up is 90 minutes rather than the usual 25 to 30 minutes.

How would I order a replacement tempco board, and what would the Euro cost be, including post and packaging to Glasgow, Scotland

Best wishes,

Blair