Arkless Electronics
Trade: Amp design and repairs.
So, to be clear the £££ I spent on my turbo version is now.... wasted - if I want to got for the upgrade ? The link you sent me does not seem to explain the Dr T mod - unless it is on a white font / white background Jez
It's a different amplifier. Simple as that. I can covert it to the GTI if you like but you lose the MM capability. The Arkless 640P Turbo+ was the ultimate expression of the MM and MC switchable version and a great phono stage in its own right. If I were you I'd be considering keeping this one as is and get another donor unit... unless of course you prefer to use your £430 (IIRC) model as a donor unit rather than get another for £40 - 90.
The link does explain the "Dr T" circuit. I hate using that term as it's merely a Dynavector marketing term for current input/transimpedance amplification but for the title of this thread I thought more people would have heard of the term than of the alternatives....
If you read through this thread from the beginning it has loads more detail about it and many reviews on it