Phase C bad. Found several bad components on card replaced bad components. Will try card agasin 7/12
The 503T That was on teh shelf looks bad. It ke[pt blowing up cards. I had Sam gtrasp the 503T from RADA#3. I have made a LabWindows dricver so we can talkm to unit and order3ed from Mouser load resistors. The oorigional Pase C card still has an issue in the low power section causing the output power transistors to be on when they shouold niot and causing them to short. 7/31