> >I wish the ARRL would go back to the same standard the rest of the
> >world uses.
>
> Wouldnt it take pressure from the manufacturers?
Nope, they do what they want to do. All that stuff about
manufacturer's influence is sour grapes.
> How many would want to
> give up their 6dB smoke screen? Be honest now.
I always use the conventional method in spec sheets. The AL-800H is
speced at 30 some dB if I recall correctly. Think about it, using
fluffy ratings helps no one at all.....everyone just moves right up
together.
The only thing the below PEP rating does is prevent us from getting
state of the art equipment because everyone thinks the -25 dB
transceivers are in the -30's.
> >Are you sure? Why does a HF PA have a 4:1 transformer in the tank?
> >That seems non-conventional.
>
> That is simply a copy from Command who claims it is the key to their
> superior IMD. They (Command) state that they transform the Rp down to
> 200 Ohms the conventional way and then use the toroid to get to 50 Ohms
> on all bands.
That's strange. As far as I knew inserting a toroid will NOT
reduce IMD, it will do exactly the opposite with one exception.
It is possible to add non-linearity that will cancel other
non-linearity.
But it isn't practical to cancel IMD when the device causing the
non-linearity is coupled to random load impedances and the distortion
source is also random. It only works in two tone tests and dummy
loads using one certain exciter at one power.
I'm certain the reason can't be IMD related.
73, Tom W8JI
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