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Output transformer
connections
Your final connections will complete the signal path of the
amplifier. At the moment, the signal path to the power
valves is all in place, so all that remains is to connect the
power valves to the output transformer and the output
transformer to the speaker sockets.
For the speaker sockets, first take a piece of bare bus
wire and run it from the grounding lug on the bottom of
the chassis, then up to and through lug 3 of the 4-Ohm,
and then through all of the lugs 3 and 4 for the other
sockets.
Solder all of these lugs except lug 4 of the 8-Ohm socket. For this lug, we add the orange wire from
the output transformer. Trim this wire to length and solder it in place, making sure to also solder the
ground bus wire you've added, too.
Now trim and connect the grey, green and yellow wires, one each to lug 1 of each of the speaker
sockets. Solder these three wires.
Final connections
There are only a few remaining wires to connect. First, take the brown and red wires from the output
transformer's primary winding and twist them together while running them over to the V3 valve socket.
Take the brown wire to pin 3 of the socket, and trim and connect it but don't solder it yet.
Add a short brown wire to connect this pin to pin 7 of V2 and solder both pins. This wires the two
valve sockets in parallel, allowing you two swap between an EL84 and a bigger octal valve without
making any changes inside the amplifier.
Summary of Contents for N5X
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