I have the V1.02 boards with the plug in band modules.
Later versions had 3 switched bands and he also released serial resonance band boards and a 10 watt amp.
Best start for Barb track is
from there you can go to different versions and add ons like 10 watt amp.
I have a few extra V1.02 boards and band boards if anyone is interested.
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??? Bob? KD8CGH