Dear guitarists, let me quote from my previous article about my BOSS PSM-5 Master Switch and Power Supply, which I almost discard if it doesn’t work normally as it should. Appointment:

The BOSS PSM-5 Master Switch and Power Supply I’m telling you about has to end its service to me in two ways: First, I’ll give it one last chance by pulling a direct wire to an external ground source. If the loud tinnitus can be cured in this way, I will keep it. If not, then you have to move on to the second final option: it has to go to the trash. Cross out the store I bought it from and call another friend whose music store is now getting famous in town for a new BOSS PSM-5 power supply and master switch.

I called him to ask for a new BOSS PSM-5 power supply and a master switch, it wasn’t there, one of his shopkeepers answered. I pass him the request, and he gets a shocking response that the BOSS PSM-5 master switch and power supply are discontinued. What is the newest version then? Nothing, we have a better option that is a more powerful adapter plus a power supply to drive your pedals. What about the Master Switch function? You can’t, you have to turn the pedals on/off individually… click! I hang up my phone before he can finish his words. What the hell is he talking about?

After calming down, I took a look at my legendary BOSS PSM-5 Master Switch and Power Supply and began to think. If it has to end this way, so be it. Let the past be the past. Before saying goodbye to him, Professor J’s last words before leaving his place appeared in my mind and rang in my ears.

• “This system relies only on this point as its ground contact…”
• “This system relies only on this point as its ground contact…”
• “This system relies only on this point as its ground contact…”

I hope you can clearly see this slightly out of focus image of my BOSS PSM-5 power supply and master switch showing a thin flat washer and nut that I removed from the Amp output socket. Those should be the exact points of these nuts that drive me crazy! That is exactly the point that “Professor J” showed me that night. They are supposed to build good surface-to-surface contact with the 1/4 mono jack on each of the Master Switch guitar and amp output jacks and BOSS PSM-5 power supply. I wish I had a better camera with me to take a macro photo of the rotten rusty surfaces and edges of these nuts.

The little red straw is a rust remover spray. I washed all the output jacks of the power supply and the master switch and the BOSS PSM-5 guitar with a rust-removing agent and cleaned them with tissue paper about 3 minutes later. Pay special attention to the cleanliness of the threaded section, rust and dirt hide perfectly. I gently rubbed the skinny nut and flat washer on extra-fine sandpaper soaked with rust remover fluid. I don’t have to show you what a melted rust looks like, do I? Repeat the steps twice, reassemble, plug the BOSS PSM-5 power supply and master switch back into your BCB 5 gig case, plug in Leo Fender’s handcrafted G&L, power up my Peavey Bandit, and let the BOSS PSM-5 power supply and Master Switch determines its own faith.

I slowly turned up the volume knob and wondered for a second if things were getting worse because I couldn’t hear anything on the speaker. I was surprised that it was at the 9 o’clock position and I heard a rather soft hiss like a snoring kitten. Instead of the buzzing noise it used to be a barking.