Spent some time braking apart old and not very old computer mainboards. Collected few kilos of capacitors and MOSFETS for future experiments.
Nice set. Press on image for big (600k) photo.
So if you need to repair some mainboard’s capacitors, you have lots of spares. 
Today I spent some time breaking apart some TV transmitters. I was looking for power transistors. Opened one very strange module with heavy heat-sinks. This is the photo of transistors I found inside:
It is Russian made Gallium Arsenide power FET transistor mounted on heat-sink. Also some filters made on ceramics. Very nice and useless stuff unless your are making some ultra-high frequency transmitter (~3GHz). The prints on transistor are:
3П610Б-2, 3П910А-2, 3П910Б-2.
Alternative output connection.
In other post I used classic output connection- collector load. Browsing in the internet I found Russian schematics of electric shock gun. It is based on the TL494 chip. But the output was connected in different way- using emitters while collectors were connected to Vcc. Here is the part of the schematics:
On the testing board everything is working. Quite cool, as we can eliminate one or two transistors- not need to invert signal to mosfet. Why this type of schematics is not in datasheet? … On original Texas Instruments there is NO such connection. But on ON Semiconductors same device (but with much more bigger values on maximum ratings) datasheet this is the first schematics! So, RTFM twice