[R-390] Heat Death

[Jim Haynes]

And another point is to only shield the tubes that need it.  Altho I've
read that well-fitted IERC shields can actually make the tube cooler
than running without a shield.

Years ago I was in industry and got a customer complaint about a 6X5
rectifier tube having short life.  I told the customer to remove all the
tube shields from the product and bag them somewhere, because they were
only there to hold the tubes in their sockets when the equipment was
being shipped.  There was no circuit in that equipment that needed the
tubes to be shielded.  (These were the shiny-type shields.  I guess we
just didn't think to include in the installation instructions that all
the shields should be removed once the equipment was in place.)

Jim W6JVE


jhhaynes at earthlink dot net