Quote:
Originally Posted by andrefranc
I checked the ceramic resistor in circuit and no opens. Should I disconnect it to check or is in circuit good enough? I was told that between 2 and 3 it should be 2450 ohms and I only have 180 ohms there. How do I know what it should be? One 24 has a plate voltage of 273, 1st tube, and the next one only has a plate of 103 volts. Can't see why though. I replaced the caps inn the power supply with electrolytics, 10's, but the cap across the choke I left as is, would it be the problem?
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The schematic on nostalgiaair shows that it should be 187 ohms between 2-3. It would be 2470 between 5-6. Your reading seems correct. The plate voltages are off a bit, but not unreasonably so, in my opinion. The schematic gives conflicting information here. In a table it shows they should both be 250V but on the schematic it shows 225V for the first 24 and 130V for the second 24. And as was noted by Reece the table shows 215V for the 71's but 190V on the schematic.
Knowing the readings for the other tubes might help.
John