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Hi, hoping Carl can chime in here. I may have lined up an original TDI. My understanding of the differences between the original and the Pro is the lack of a volume control and the lack of a fine ground balance knob. Were there any other differences?
I found someone's reverse engineered schematic of the TDI Pro and see the volume pot is a ahead of the audio amplifier. Is the same audio amplifier topology present in the original TDI, so it should be as easy as replacing a fixed resistor or two with a pot?
For the Ground Balance, I saw an old post of Carl's somewhere that the fine was just a 10k pot in series with the 100k coarse? So it should be as easy to add a pot and potentially dial down a trimmer to make these equivalent? I'd much rather drill a hole for a proper pot than bolt some stupid vernier knob adapter on like I saw someone selling on eBay.
With these 2 mods will I have upgraded it to a Pro? Thank you in advance.
I found someone's reverse engineered schematic of the TDI Pro and see the volume pot is a ahead of the audio amplifier. Is the same audio amplifier topology present in the original TDI, so it should be as easy as replacing a fixed resistor or two with a pot?
For the Ground Balance, I saw an old post of Carl's somewhere that the fine was just a 10k pot in series with the 100k coarse? So it should be as easy to add a pot and potentially dial down a trimmer to make these equivalent? I'd much rather drill a hole for a proper pot than bolt some stupid vernier knob adapter on like I saw someone selling on eBay.
With these 2 mods will I have upgraded it to a Pro? Thank you in advance.
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