[Hammarlund] SP-600-25C

[wb3fau55 at neo.rr.com]

So, ongoing issues,  but it looks like I fixed it.  Putting the 600 on lime in my shack, it developed a real bad drift problem.  As I had taken apart  the RF deck, I found vitamin Q caps installed here.  I did not change these.  Just  touching  the 6C4 HF osc tube,  caused more drift.  I shut it down,  pulled the 6C4,  sprayed D5 in the tube socket,  sucked it out  with a shop vac.  I installed a new 6C4 and an IERC black tube shield.  Ran it  all day,  seems just fine now.  I have found  problems  before with 6C4s.  Comments and experiences appreciated.  73s Russ.