[Amps] design approach for QRO solid state

[Jeff Blaine]

The SS stuff is haunted by the two gremlins same as always.  Low impedances 
(which make cooking up the I/O and combiners hard to do efficiently) and 
moving the massive heat generated out fast enough.  In a sense, the limiting 
factor with SS adoption is a materials and build related issue, not so much 
a semiconductor issue.

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-----Original Message----- 
From: peter chadwick
Sent: Thursday, September 12, 2013 10:21 AM
To: Roger (K8RI) ; amps at contesting.com
Subject: Re: [Amps] design approach for QRO solid state

Adding to Roger's comment on diffusion and temperature, this is why old 
tunnel diodes are often u/s. Tunnel diodes use very high doping levels, and 
some diffusion occurs over time even at room temperature. This is why a lot 
of 1970s 'scopes aren't triggering well - if at all.

73

Peter G3RZP


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