Richard,
I just finished restoring a Tek 647A using a HV transformer from a 453. The
transformers are nearly identical except to pin-out arrangement. Both
transformers require heat sinking to the chassis using suitable thermal
grease. I prefer non-silicon compound such as Wakefield 126 series or one
of the popular PC processor thermal compounds that have better spec's. The
thermal compound on the ferrite core is there to remove heat, not for any
electrical purpose. I avoid silicon-based thermal compounds, because they
tend to creep and may eventually lead to electrical issues.
George
On Thu, May 3, 2018 at 1:05 PM, Richard Knoppow <dickburk@...>
wrote:
I am still working on my 453. The HV transformer is mounted with some
sort of clear grease. I think this is heat sink compound but may just be
silicone insulating grease. What is recommended here? I am also replacing
Q-930 and wonder what compound is recommended for it.
I have clear silicone grease intended as a HV insulator by GC
chemicals, is it OK for the transformer. I can get regular heat sink
compound locally if necessary.
--
Richard Knoppow
dickburk@...
WB6KBL
