Re: [Amps] Really Big Solid State Power Amplifiers

[Larry Kayser <kayser@sympatico.ca>]

Ian White, G3SEK wrote:

> Larry Kayser wrote:
>
> > For me, my concerns with solid state is to have an effective 
> > controller that will protect my investment.  After some consideraton 
> > what I want is a G3SEK type box that will look after my dollar 
> > investment in solid state RF modules.
>
>
> G3SEK is thinking quite seriously about that...
Ian:

The issue is as I see it has several facets, bad things that happen very 
fast, things that are not consistent on the load side, and longer term 
thermal things.  I have a sense that a lot of bad things  happen because 
the load has changed, some of the relay and antennas I see being used 
are design margnal.  The hard part as I see it is the things that happen 
really fast.  It is all over long before one even realizes there is a 
problem.....

The DECCA design of MOSFETS used a rather elegant fold back design that 
provided a continuous offloading if there was a load problem. 

Is the time to start serous looking at big solid state amps start after 
we have a working protection system?

Larry
VA3LK

. 


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