I was just about to say that Pin2 is connected to one of the red leads that goes to the capacitor, therefore with the red leads disconnected there would be 0V at pin2, but instead I decided to test it anyway...I got 0.5VDC!!!! Then I realized what is happening: When I disconnect the two red leads from the capacitor, but still have the two leads connected together the voltage reads 0.5VDC at pin4 and pin2. When the red leads are disconnected from the capacitor, and also disconnected from each other I get just over 8VDC at pin4, and 0VDC at pin2 (as expected). ...as for a glow from the monitor filliment, I had to turn off all the lights to see it, but yes indeed, there is a glow. Phil On Aug 11, 2009, at 10:48 PM, William Levak wrote: > On Mon, 10 Aug 2009, Philip Lord wrote: > >> Thanks William, >> I did as you described. >> I removed the red wires from the capacitor and re-measured the >> voltages on either side of the two diodes. >> As before I get just over 8VAC on the anode side, but now I get >> just over 8VDC on the cathode side. > > That's good! I assume you mean the side that is pin 4 on J8. What > about pin 2? > >> I also tested the large capacitor using the ohm meter on my digital >> multimeter. It starts at Zero ohms and slowly rises. > > That's also good. > > By the way, you should not run the computer for any length of time > with the big capacitor disconnected. That provides most of the > filtering on the power supply. However, since you have no power > output, it is safe, for now. > > Also, I don't thik you mentioned whether the filiment on the CRT > glows. > > firstname.lastname@example.org > SDF Public Access UNIX System - http://sdf.lonestar.org > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2009-08-11 16:55:04
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