Sunn Concert Lead 1973 Silverface, recently serviced

1973 Silverface Sunn Concert Lead. Solid-state. Two channels, one with built-in distortion (switchable), one with reverb. This is the earlier 150 W version of this amp, before they went to the single-channel red knob version. It's exactly the same circuit as the Sunn Concert Bass, except with the second reverb channel.

This one was recently completely serviced, including:

• NOS RCA 2N3055H output transistors
  
• Added Sunn's recommended "stability mod"
  
• Completely recapped
  
• New power resistors on output board
  
• New emitter ballast resistors mounted to chassis
  
• New knobs
  
• New handle
  
• New 1/4" output jacks
  
• New power switch

All of the pots have been cleaned and lubed. A couple are still scratchy but usable. No footswitch included, but I've made a few shorting plugs for the RCA jacks in the back, so you can leave the distortion on and control it with the front knob.