August 2001

Enjoy the Music.com

M500 Kit Building log

Review by Thorsten Loesch
Click here to e-mail reviewer

Picture 3

The Kits unpacked, Transformer covers removed to avoid scratching them. All Parts and used tools are in the picture.

 

 

Picture 2

Right, prepared for the first step in the assembly, just got to have cool Drink before I start....

 

 

Picture 1

That was good, now what are we going to do with that lot of overcooked spaghetti?

 

 

Picture 5

Okay, wired up the bridge rectifier for the 300B Heater.

 

 

Picture 6

Now I have finished wiring up the rectifier Valve - hey this is fun.

 

 

Picture 7

Okay, the heater connection for the Driver Valve is done, I needed to extend the wires a bit to reach there.

 

 

Picture 11

The wire and high temperature plastic sleeving to be used for most internal wiring.

 

 

Picture 9

Inserting the ground wire from the Power Supply board and finished wiring up the Choke and other PSU bits.

 

 

Picture 12

 

 

Picture 13

Wiring up the output Transformer primary.

 

 

Picture 14

All sorted out for the 300B's Anode connection and the supply to the driver.

 

 

Picture 10

One complete set of electronic parts. Now where do all these go?

 

 

Picture 15

Wiring up the input connection. The input wire is my secret weapon - "Die Vergeltungswaffe" - superthin magnet wire with lots of air and shielding.

 

 

Picture 16

The other side of the input wire, on the RCA input jack.

 

 

Picture 21

The capacitor for the 300B Heater supply is fitted and the heater wiring completed.

 

 

Picture 17

Driver Valves cathode resistor and Black Gate bypass capacitor fitted.

 

 

Picture 18

All other passive components fitted to one amplifier.

 

 

 

Picture 22

And the other fully wired Amplifier.

 

 

Picture 23

Overview of both completed amplifiers, coming with liquid refreshment as well.

 

 

Picture 26

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.

 

 

Picture 28

Voltage balancing and discharging resistors for the power supply, again this mod was cleared with the factory and is now fitted as standard.

 

 

Picture 29

 

 

 

Picture 30

Voltage divider and balancing resistors fitted and wired up.

 

 

Picture 31

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

     
 

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