Minor Repairs
 
After having the organ a little over a week, I took a break from playing it and started to clean it up.  The vacuum tubes had a lot of dust on them and that can hold the heat in and shorten their life, so I cleaned those, as well as all of their sockets.

The spring reverb was not working when I got it, but I cleaned some of the contacts for that and it started working as well.

The percussion effects were not working either, but I sprayed some contact cleaner into the switches and turned them on and off a lot, and soon they were working, too. Hammond M-102 Monday, December 26, 2005 This is the amplifier.
It uses vacuum tubes instead of transistors to amplify the sound.