Breadboard type for valve circuits?
Figure 1. Solder tag strips were standard for valve amplifier construction.



Figure 2. Screw terminal strips may provide a workable alternative for development work. Two of these blocks would be required spaced far enough apart that the large components could fit between them. The double-rows means that components can be replaced on the inner terminals without disturbing the wiring on the outer terminals.



Figure 3. For the man in a hurry, the rail mounted cage-clamp terminals might be the answer.

 

Figure 4 and 5. The cage-clamp terminals hold wires in place using a spring cage. During insertion or removal he clamp is opened by levering with a small screwdriver through a slot adjacent to the spring.