Re: Ferrograph S3 and S4 help with some issues please
Re excessive background noise, these old Ferrographs had a tendency to magnetise their own head due to switching impulses when changing function. I had this problem with my old Series 5. It's mentioned in the manual. You're supposed to turn the rotary function switch in a certain way to minimise this.
If it hasnt already been mentioned, have you properly demagnetised the heads and tape path, with a decent demagnetiser tool? I'd say especially with an old Ferro, a good demagnetiser tool is essential.
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