I'm new to the forum and is also a bonafide noob to tube audio. I'm putting together a dynakit/triode MKIII kit with the Poseidon driver board and SDS Lab capacitor kit. I have no trouble following the instruction until I got fancy and bought a power supply delay action board on ebay made by Sophia Electric. Here is the introduction and instruction for the delay:
This board was designed by Sophia Electric for its service department to retrofit into tube amps made earlier. It would permit dynaco or any other brands of tube amplifier to warm up vacuum tube filament first, then switch to high plate voltage in about 12 - 30 seconds later. Research shows that without proper warm up, vacuum tubes would decrease life span significantly (instead of 5-7 years of normal life span in average home use, power tubes would wear out within 1-2 years in most situations). That is the reason why most tube amp makers would only offer 6 month warranty on tubes.
Braid green wires are for 6.3V AC (from tube filament supply).
Red/Black wires (2 pairs) are being used to switch up to two (2) sets of power supply.
I figured I should use Pins 2 & 7 of either V1 or V2 for the 6.3V AC supply. What I'm not sure of is how to hook up the delay (relay) to switch the plate power supply. Do I put the relay (Red/Black wires) between the output transformer's Blue wire and V2 Pin 3, and Blue/White wire and V1 Pin 3? I'd appreciate any help you guys can give me. Thanks.