M500 Kit Building log
Review by Thorsten Loesch
The Kits unpacked, Transformer covers removed to avoid scratching them. All Parts and used tools are in the picture.
Right, prepared for the first step in the assembly, just got to have cool Drink before I start....
That was good, now what are we going to do with that lot of overcooked spaghetti?
Okay, wired up the bridge rectifier for the 300B Heater.
Now I have finished wiring up the rectifier Valve - hey this is fun.
Okay, the heater connection for the Driver Valve is done, I needed to extend the wires a bit to reach there.
The wire and high temperature plastic sleeving to be used for most internal wiring.
Inserting the ground wire from the Power Supply board and finished wiring up the Choke and other PSU bits.
Wiring up the output Transformer primary.
All sorted out for the 300B's Anode connection and the supply to the driver.
One complete set of electronic parts. Now where do all these go?
Wiring up the input connection. The input wire is my secret weapon - "Die Vergeltungswaffe" - superthin magnet wire with lots of air and shielding.
The other side of the input wire, on the RCA input jack.
The capacitor for the 300B Heater supply is fitted and the heater wiring completed.
Driver Valves cathode resistor and Black Gate bypass capacitor fitted.
All other passive components fitted to one amplifier.
And the other fully wired Amplifier.
Overview of both completed amplifiers, coming with liquid refreshment as well.
After clearing the modification with the kit supplier this RC Combo biases the Driver Heaters to around 90V to avoid exceeding the Heater/Cathode rating of older 6SL7 Valves, this is now included as standard.
Voltage balancing and discharging resistors for the power supply, again this mod was cleared with the factory and is now fitted as standard.
Voltage divider and balancing resistors fitted and wired up.
Completed amplifier, fitted with the protective cage for the valves. Time to take them into the lab for testing and then into the living room for listening.