[Amps] Stock up on tubes?

[Jim Thomson]

Date: Tue, 6 Dec 2016 10:21:37 -0500
From: "Paul Christensen" <w9ac at arrl.net>
To: <amps at contesting.com>
Subject: Re: [Amps] Stock up on tubes?

For those of you who have not yet seen this video, it shows some remarkable cooling progress being made to SS amplifiers.  I hope that in the near future, we'll see more SS amplifiers using closed-loop water cooling.  

https://www.youtube.com/watch?v=gLCuWs5SdBI

Pau, W9AC

##  The cooling concept works...good. 
##  I see the 11m ops have discovered the LDMOS devices. 

Go to 21.05   and see where he cuts the output coax..slowly..... laying a dead short on the output, then as he slices clean through... a wide open ! 
Then puts a screw driver across the center and shield, and draws huge arcs..all with drive applied.   Thats with a 5 kw slug  on the output side..and  214-U. 

https://www.youtube.com/watch?v=7LiuynU9xSw

Then leaves drive applied..with a wide open.  It doesn’t blow up. 

Jim  VE7RF