Point to Point
Early Fenders were built using an eyelet board: a flat piece of fibreboard with rivets punched into it and the components laid against it then soldered onto the rivets.
Modern ‘turret’ boards look like this:
Tagged Circuit board used (since the 50s) by 99% of retro tube amps
A TRUE point to point amp has no circuit board. The tubes and controls are chassis mounted and the wires run directly between them without going via a circuit board. Components are soldered straight onto valve pins and potentiometer terminals & the use of wire is reduced to a minimum and as a result there is a minimum amount of cross talk between components compared with mounting parallel with each other. This reduces noise pick up, unwanted phase distortion and the risk of parasitic oscillation. It also increases reliability, robustness and repairability.
Real point-to-point has no need for tag boards and eyelet boards - each component is literally soldered to the next.
This is the purest method of building, but also the most time-consuming. Not only does everything have to be manually fitted and soldered, but each unit has to be tweaked to ensure it matches the prototype for tone and noise performance.