Pay attention to what I wrote. The amp in the project uses 6DG6 tubes and the power transformer puts out only 200 volts. That’s low voltage for a guitar amp. The preamp stage is high enough gain for a guitar amp, but a harp player would put in lower mu tu;71.IRsebve built many bassmans and the stringing all the wires is not a big deal. It just takes a little longer. I’ve wired a bassman in about an hour.Why would you post like this if you haven’t read the article and obviously don’t know about amps?