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For Sale Genuine Tripath evaluation board RB-TA3020 with power supply PCB

Things you have for sale.
Hello I have 3 Tripath evaluation board RB-TA3020 for sale at 76€ if you need power supply pcb
Included Sanken rectifier bridges and connectors is 18€.
Here populated power Supply shown as an example
Tracked shipment shipping to US on request.
Payment by paypal
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Hi,
I won a board like this at the Burning Amp raffle this year, and am trying to figure out what PS voltage it needs. It's marked as requiring the lower voltage range of 21-39 volts, but I'm not sure how to verify that. The Tripath paper I found showed the gain calculation, but the first resisters I looked for show up on the pcb, but there's no physical resister there. Are some of these built into the chip, or am I missing some parts?