I picked up a vintage Truetone Kay 9528C Amplifier (same as a Kay 803) from an online Trash & Treasure site. These amps were made in 1964-65.  It’s a small amp with only a volume and tone control and puts out 5 watts.  I only paid a few bucks for it because it wasn’t working properly.  I checked all the basics and cleaned the tube sockets with DeoxIT before firing it up.  It’s still all original, so I’ll probably have to replace the capacitors.  There’s a lot of hum and little output.

 

 

 

Demo of the amp after cleaning the input jacks (they were not getting a good ground) and tube sockets.  The next step is to replace the caps (which are original) and hopefully that will eliminate the hum.