>>Perhaps the reason is that manufactures of amateur amplifiers are almost
>>always hams and just duplicate amplifier layouts from the past.
To your point, I suspect that if we were to put the question to the designer
of every commercial amplifier to explain the exact mathematical analysis
used in determining their chosen R/L parasitic values, few, if any, could
offer a solid explanation.
Or, what of the HF amps that use no suppressors at all? Give me the
analysis that conclusively says that the amp I purchase, will never be
subject to a parasitic oscillation. If it's because of the use of extremely
short lead lengths, great. But show me. Better still, how about putting it
in a time-unlimited warranty if there's such a strong feeling about it?
Logically, I don't look at the lack of available commercial amps with
Nichrome suppressors as any indication of their practicality (or lack
thereof). In fact, there are low-cost circuit ideas I believe should be
incorporated that are not available in today's amplifiers. Should I condemn
every manufacturer for not including some of these basic ideas?
At one time, Emtron offered one of their early amps with Nichrome
suppressors. I do not know if they found some rational reason for changing
More plausibly, they simply did not want to get "caught up" in the
nonsensical debates.
If you're a manufacturer, would you really want to be spending all your time
on the phone defending your use of Nichrome as a result of all the
destructive discussions when you've got a business to run?
Paul, W9AC
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|