03-01-2013, 12:11 AM
Checked resistors and caps as suggested. All measure correctly and caps don't leak. I replaced the burned resistor and put the other parts back in the radio as they were. Everything works well, as before.
While the components were unsoldered, I measured the current through resistor #18, and the reading confirmed my calculations. The DC current through #18 is just below 4ma, and the AC (measured by my VOM) is a few microamps. Just for fun I measured the current through the RF coupling transformer #13. Readings are about the same, or a little lower.
I guess the resistor burning might be a fluke or maybe a result of something I might have done when I was originally recapping and testing the radio. I don't remember shorting anything or anything like that, but it was a while ago.
Since I have the radio open I was thinking of adding a power resistor to drop the line power back to 117 VAC or so. Could anyone suggest where I could get the kind that people attach to the side of the chassis, and what value to use?
While the components were unsoldered, I measured the current through resistor #18, and the reading confirmed my calculations. The DC current through #18 is just below 4ma, and the AC (measured by my VOM) is a few microamps. Just for fun I measured the current through the RF coupling transformer #13. Readings are about the same, or a little lower.
I guess the resistor burning might be a fluke or maybe a result of something I might have done when I was originally recapping and testing the radio. I don't remember shorting anything or anything like that, but it was a while ago.
Since I have the radio open I was thinking of adding a power resistor to drop the line power back to 117 VAC or so. Could anyone suggest where I could get the kind that people attach to the side of the chassis, and what value to use?
John Honeycutt
