I must have been feeling ambitious this morning- decided to put the MiSi pickup in Ron's new baritone.
First step: secure the instrument firmly on the work table. Notice all the padding, and the clamp pressure is over the very end where the butt plate resides.
Second step: determine the exact center of the end plate and drill a pilot hole entirely through the butt plate.
Now, with the step drill, enlarge that hole to accept the pickup barrel.
Here is the pickup. The silver threaded barrel must go through the hole from the inside. I insert a long dowel into the hole and impale the pickup held inside the uke. Then carefully draw it out the hole. That circular blue thing is a capacitor which stores and electrical charge. I takes 60 seconds to charge and will then play for 16 hours.
But first I have drilled a small hole through the slot in the bridge and inserted a thin steel wire which was wrapped around the pieso cable of the pickup. Now you can see the threaded end of the barrel coming out the hole held by the dowel inserted into its center hole. The washer and nut are then threaded on and tightened up, securing the pickup in place.
Now the steel wire is gently pulled, bringing the piezo cable out through the hole. The cable is laid carefully into the slot for the saddle, The saddle is replaced and the job is done.
The strings are tightened over the saddle and bring pressure down on the piezo cable. The vibration of the string creates a tiny electrical charge that is sent to the pickup, from the pickup to the amplifier, and so sound is magnified. My test of the system was very successful. This baritone just bellowed. The MiSi pickup has been very successful. I have installed a lot of them now and have the technique figured out pretty well.