Spring has arrived and the weather has been nice enough that I am calling it bicycle season.
I ordered a whole passel of parts in anticipation and have spent some time fixing up my bike. The difference is night and day. I put a new set of front sprockets on, a new bottom bracket and a new chain. Cleaned the old derailleurs, adjusted everything and
It is like riding a whole new bike. Silent pedaling. Smooth pedaling. Easy shifting.
I wonder why I didn’t do it sooner?
Of course, there are some hazards that go along with early season biking. I hopped a curb and landed on a fist size chunk of ice and dirty snow that skittered a couple yards out of the way. My first low side of the year. Fortunately, it didn’t take too much skin with it, because I was bundled up for the cold.
In case you happen to be orienting a Porsche 944’s brake caliper pistons, a triangle with a 20 degree angle is helpful. I used Wolfram Alpha to make one, since I was too lazy to find either a ruler or a protractor.
The cutout should face into the rotor’s rotation. That means, for the front brakes, it should face to floor. The consequences for screwing it up are slightly faster wearing pads.
I’m not sure what this big blue fellow is. It had four leads coming out of the base and claimed that its case was negative. Big cap? Vacuum tube? It is between the part that I think is an amp and the part that steps down and converts the AC to DC.
The transformers above the blue fellow are the parts that weathered time the worst. The rest of it was in pretty spotless condition. Must not have been in a smoking office, which is a little hard to believe if it is as old as I think.
I am pretty sure the little three legged fellow is a transistor. It is, as far as I could see, the only one in the whole unit.
Another interesting thing about these intercoms is that they don’t have separate microphones. Pressing the switch just changes the circuit the speaker is on, which allows it to work as a microphone.