We’ve been scrapping an old analogue transmitter at work, and I decided to recycle an old rack-mount chassis, as well as some other tit and tat, as an electrical box for the high-current DC parts of my solar system.
Just a picture! I’ve got a few of these old variable power supplies, and for the longest time I’ve been putting off putting the regulation knobs on the front rather than on the regulator board inside.
The voltage knob is, er, upcoming.
After many hours of work, I finally got my Yamaha P-2200 into a state worthy of being tested. The left channel is 100 % original, save for new electrolytic capacitors. It should be fairly representative of a completely original unit. The right channel has received major repairs. The high vol = FS noise floor on the right channel is not due to the repairs done to the amplifier, but rather the factory wiring of the amplifier; it’s mostly made up of 50 Hz hum. There’s probably a signal wire going too close to the transformer, somewhere.
All in all, the Yamaha P-2200 is a very well-performing amplifier, especially for its age and the fact that it’s Yamaha’s first ever dive into the world of PA amps. With plenty of passively-cooled power, tank-like build quality, an impressive noise floor and a good damping factor to boot, Yamaha made sure to make their PA power amp début one for the ages!
These files are huge (about 3 MB each), so give it some time to load!