On 02/27/2017 10:55 AM, Jim Brown wrote:
Yes, the control circuitry is quite complex, and I wouldn't want
to work on it. But that control circuitry can prevent a lot of damage,
and can make tubes last longer by going into protect mode when grid
current rises.
There are very simple ways to automatically bypass the amp when the grid
current becomes excessive. Here's an example :
http://www.k6xx.com/radio/76a_prot.pdf
73,
Steve, N2IC
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