SB-230/ 8873 tube change

[Leisman]

Dear all:

When I change the 8873 tube in my SB-230, I am assuming I will need to
clean the existing beryllium block free from the heat conductive gel,
re-apply the gel or cream as I replace the tube.  Anyone know where I
get the gel/ cream?, and, has anyone had any experience changing the
8873?  What did you use to clean the beryllium block and what
precautions did you take.

Any help would be appreciated.  Ican't believe I'm the only one to run
into the problem.

Dave, W8QW

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