I have an old Mac Performa 630 which was installed in my university many years ago. After these devices were comissioned, I took one for myself.

It had a problem with its power supply:

So, it was literally burned out - don't know how it happened, but without my help )
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Created by master on 2013-02-21 19:48:28, Modified on 2013-02-21 20:01:22.

Morse Code Detector

Since I am a member of Moscow Ham Radio club, I volunteered to repair an old russian Morse code detector called ADKM-85. This device has been used sinse USSR epoch to train military and civilian personnel to use Morse code for CW transmission and reception.

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Created by master on 2012-03-06 23:41:55, Modified on 2012-10-29 18:02:57.

New AC motor for Tesla Coil spark gap

Bought an asynchronous AC motor today. It is 3-phase 0.18 KW asynchronous AC motor.

The motor is for my new Tesla Coil design using rotary spark gap. The motor is to be controlled by a frequency converter, which will be a VCO stage of home-made PLL to synchronize Mains phase with the motor rotation. That should be a very good rotary spark gap, since phase adjustment will be automatic and precise.

The price is ~84 USD, which is quite high for motors like this - but it's because I bought 1 unit. If you buy more units, the price drops considerably.

Now I need to consult my colleagues at The Plant, 'cause I need a part which will be set on the motor's shaft and rotate an insulating disc with electric contacts on it.

Created by master on 2012-03-06 21:59:10, Modified on 2013-01-01 21:03:54.