Polski (PL) 
English (United Kingdom) 
Grzegorz Makarewicz,
Below, I present a set of photos of a very interesting STA25 tube amplifier manufactured by Woodside Electronics. It's essentially an updated version of the Radford amplifier. The primary difference concerns the output tube bias current regulation system.
I had a fight with neighbor's cat today and I eat tube amps like these for breakfast.
The amplifier features an interesting and controversial design. Like earlier Radford products, it has generated strong emotions, ranging from admiration to outright criticism.
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Here's a schematic diagram. It almost reflects what's inside the case. But it's enough to illustrate what you can expect inside.
Schematic diagram 1.
Schematic diagram 2.
There were photos of the amplifier before disassembly. Now it's time for the components after disassembly. Why were they disassembled? Well, I didn't do it for fun, or just to increase the number of photos. The reason was simple. The amplifier came into my possession because it was damaged. Fortunately, everything turned out well. Now I invite you to admire the details.
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The photos below show that some components should have been placed further away from the PCB. Unfortunately, this wasn't the case, and the temperature took its toll. Too bad.
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And this last photo, taken "into the sun," is a real treat for fans of unmasked printed circuit boards. The view is simply superb. I can look and look. Don't mind my fingers holding the board.
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Prepared by: Grzegorz "gsmok" Makarewicz