>It is. But there are limits. Optimum stability is a complex blend of
>interactions. There is no universal cure that works in every case.
Thanks Tom, for the well thought out note. Stability IS a very complex
issue and is not easily solved by any one method. I guess in my case for
my amp the added coil in the anode lead that I used probably adjusted
both the gain and phase margins of the tube so that it is stable w/o any
resistive type suppressor.
>
>Knowing how something work is important.
This is true. Very true. I used to be a firm believer in the nichrome
theory. It sounds good on the surface and as one reflector reader put
it, "The theory sounds correct." However, an ancient Jewish proverb
states in effect, "Every story sounds good until another comes and cross
examines it." Once I was able to successfully build an amp using a
4-1000A that needed no suppressor resistor let alone any nichrome, I
realized that while Rich's suppressors may work and probably won't cause
any harm, are they necessary. I maintain that even for a 4-1000A, they
are not. Perhaps some of the other tubes you mentioned, 572B, 811A, etc
may benefit from nichrome.
Rich always quotes the papers from the 1930s to justify nichrome.
Perhaps there is lots we can learn from previous generations. And
perhaps those guys knew quite a bit. But people once thought the earth
was flat too. Technology has also come a long way since the 30's. Back
then radio was in infancy and I don't think television was even around
let alone, computers, VCRs, answering machines, contest keyers, etc.
73,
Jon
KE9NA
-------------------------------------
Jon Ogden
KE9NA
http://www.qsl.net/ke9na <--- CHECK IT OUT! It's been updated!!!!!
"A life lived in fear is a life half lived."
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