Hello. I have the signal Transfer company precision phono preamp PCB on its way, but after ordering, I came to a realization that it requires a symmetrical PSU, so I can't use the one I was planning on using. I'm thinking about buying the ST small signal power supply, but I want to assess cost first, so I know if I could afford to build it. I got the BOM spreadsheet from Douglas, but the names are so cryptic to me that I can't decipher most of the parts, except for the caps and resistors, and the stock codes given don't work on DigiKey nor Mouser. Can somebody who built it help me with the assessment?
@Mark Tillotson already did, but no results. I just typed in the descriptions into chatgpt and it gave me the answers as to what is what. But I have another issue, which is the transformer(s?) in the BOM I see 3 listed, but on the pcb photo I see a place for only one, am I missing something? The listed transformers are TX18VA-2X18, TX35VA-2X18T and TX6VA-2X18
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The transformer has dual 18V windings so you only need one transformer. It seems Self has listed three different power (VA) ratings so I presume the phono doesn't need much power and you can use whichever you like, i.e. any toroid (6VA or more) that will fit in the footprint.