yachadm: Also, I have never seen this large IL1 bulb on this Control PCB illuminate - what is its function, and when should it illuminate? It tests OK, so it is not burnt out. It's an old trick to stabilize a Wien bridge oscillator and reduce its distortion. The bulb is used as a temperature / current dependent resistor at a low current and therefore

I vaguely recall that you replaced the speed indicator light bulbs with LEDs sometime earlier? Rethink / recheck that area. The flip flop circuit which controls the speed selectors looks like it will be sensitive to correct load by the bulbs. Other than that, I can't see other solution than start measuring around, perhaps around D5 / C3 / TR2..

I think it's because the images are quite wide. Browsers are generally rather bad at printing. Try printing in landscape mode, in the preview in my Firefox that seems to help. -mika

kuliand: Now this might seem like a really simple and stupid question but when using a pair of Beolab 6000 speakers with a non B&O source how do i go about connecting them? can i just run phono leads straight from my cd player? or must the signal pass through an amp first? Not really an amplifier, but actually an attenuator. If you connect these

Jandyt: Seems like you are going the right way Chris. The pin does not come out or rotate in use. It just moves in and out by about two mm, I just rotated it to speed up the gunk dissolving process. Don't overdo the oil, you will only make a mess for dust to stick to. Second that. I actually used penetrating oil at first to get the part loose, and

9 LEE: Correct. the number generator is asked to draw 10 random numbers between 1 and the latest member number. I hope this is implemented properly, and not like "rand() modulo 700", which would weigh the beginning of the number range (No, I'm not serious. But I once came across a vote count program, which would use an operation like the

So that means that we have about 700 gold members? In that case, the probability of someone not winning at all during a year is P = (1 - (10 / 700)) ^ 12 ~= 0.84 (or of course, simply the opposite of the one in six you mention). Calculating further, the probability of a member winning exactly twice during a year is P = (10 / 700) ^ 2 (two winning months

I'll have to try the cap upgrade too. I replaced all electrolytics elsewhere to get my turntable to work correctly, but didn't touch the CD4/RIAA board. Sounds good as it is, but I'll certainly take a cheap improvement like this! Those red drop tantalums B&O used in the 70s seem to be a problem always. -mika Edit: I gave a little thought

Oh yes, and 1N60 is definitely not a zener. It's a plain old germanium diode (I overlooked you previous post, sorry. I'm pretty sure this is the muting circuit). -mika

Is this on the CD4 decoder board? The only section that seems to match this in my schematic is the muting circuit there. It's not critical, try it with 1N4148 and see what happens... The idea is that the transistor should start to conduct after a delay when the arm is lowered. If it doesn't, you won't have sound, as the next transistor stage