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The stuff I am using is MG Chemicals 8462 grease. Has very good insulation properties but not high heat transfer. The original material was thin, clear, grease of some sort both on the transformer and on the transistor. I used a very thin coating in both places.
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I am replacing all the transistors in the HV regulator circuit, four in all, cost about $12 at Fry's for NTC parts. May not cure the problem but I hope it does. Ohm meter testing shows all the transistors to be good but I am not quite sure I believe that. If there is no change I will have to look elsewhere but I thought it necessary to change these parts. I will also repost in either case, either to brag or to yell for help. I really want to get this thing going again. The ground glass grease sounds like its meant for keeping ground glass chemical apparatus caps from sticking. On 5/3/2018 1:35 PM, bonddaleena@... via Groups.Io wrote:
Hi Richard. It's amazing how some 'old wives tales' never die. There was recently an excellent link on eHam about heat sink compounds. The author worked as an EE for a large cable Co. So, he dealt with weatherproofing/heat sinking every day. --
Richard Knoppow dickburk@... WB6KBL |
