That's perhaps one deck that Ki doesn't have
I have changed one of my A80Rs into an ML 5 using cards and advice from Fred Thal. The changes are basically the record/repro cards,modified oscillator card,output module and power supply ( The cards run at +/- 15V DC as opposed to the Studer cards at +/- 12 VDC).John French did his usual superb job in rebuilding the headblock to ML5 spec. This uses Studer Schmetterling heads and a mono erase head.I am very proud of my number 1 machine which is a totally rebuilt A80R with FM mastering heads but the ML5 rebuilt (number 3,number 2 is an A80R with highly modified Bottlehead Eros) is really a significant step up even if it does not measure as well as the Studer/FM. Other idiosyncrasies are the single ended outputs and the operating level of 200nW = -6db.
Did you buy the ML5 cards from Fred?
From your post at the bottom, you mentioned you had also upgraded audio power supply to an externally regulated +/- 15VDC on your Machine with Flux Magnetic heads (machine 1 ?). So, you were supplying the original Studer audio cards with +/- 15VDC and let the cards regulate them down to +/- 12VDC. Am I correct?
If you have your normal operating level set with 200nW/m MRL cal tape at 1Khz, it would only be down -2dB from +4dBm normal operating level set with 250nW/m tape ...your -6dB seems bit too low...
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