Fender Red Knob Twin - Every Amp Techs Nightmare
Author: Six Date Posted:25 June 2021
Fenders Red Knob amps from the late 80s/early 90s were overly complex beasts that have now reached the age where they come flooding in for similar majopr repairs. This specific example was brought in with super low volume.
What's unique about these amps is the dual channel design also provides the option for parallel channel operation as well as channel switching. As to why anyone would use this is beyond me, but maybe having a mediocre distorted tone in tandem with a typical Fender clean is some folks jam.
The way this is achieved is through the use of complex switching jacks. Over time, they're prone to corrosion and fatigue of the internal contacts resulting in signal not getting to where it needs to go. The solution is to replace all the jacks on the amp as they're all decades old and if one is going, the others won't be far behind.
While we were in there, a complete recap was done to give it another couple decades of solid use.
If you have an amp that needs some attention, the team at Dr Gear has the experience and the expertise to work on vintage and modern equipment.