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I have a GR-2050 21" Heathkit that I built back in 1976. It took me a week to build it and worked from day one. I have only had two problems with it, a power resistor on either the hoizontal or vertical output board. It was a 5W and is now a 20W. The other problem was with the Hight Voltage section. I sent it back to Heath for repair and they fixed it by mounting two large power resistors on the back of the PC board so get some airflow. (they were mounted just above the HV cage and had no airflow.)
I bought a GR02001 from a guy who took a course and coudn't get it to work. I went over the TV completely and fixed several problems. The picture tube was severly burned across the front due to alignment procedures. I junked the case but I have all the boards and back chassis for some spare parts.
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