>
>> Somehow I wish more people would run tubes like 4CX5000 or
>> 4CX10000 or similar, think we would have less splatter and
>> cleaner/nicer sounding signals on the band.
>> These days we have rigs with very big power spikes that flat
>> tops the amplifiers and also people that drives the crap out of
>> their 1500 W amps to make them deliver a puny 350 Watts more. Take a
>> good listen to the SSB signals of today, at least 75% of them
>> flat tops or doesn´t sound right.
>
>Maybe, but then we must also think of all the wonderful signals
>that would come from grid driven tetrodes with poor screen or bias
>regulation.
>
? Tom - - How can grid bias regulation be a problem when the grid
current is zero?
>Grounded grid triodes, if properly tuned, enjoy the benefit of heavy
>negative feedback. That feedback makes for very clean
>amplifiers.
? good point
>The proper way to tune a grounded grid PA is to actually
>OVER load the PA slightly, and then reduce power in operation.
>
>A better way to reduce splatter is to educate the idiots who turn up
>the internal power controls of their rigs, in a CB-like manner.
? amen
>
>Most radios are very poor IMD performers both at very low and very high
>power. Many tetrode amps wrongly suggest that running a 100
>watt radio at 10 or twenty watts makes a cleaner signal, that isn't
>true at all. The opposite is actually true.
? So don't take suggestions from tetrode amplifiers.
>
>While a babied overkill properly designed tetrode might be OK,
>there is just too much to go wrong in the hands of people who can't
>load a triode. Either PA, especially the GG triode, would be cleaner
>then the radio anyway.
>
? true. However, a pair of properly loaded 3-500Zs gets pretty nasty
when driven by 200w.
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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