> Here is a point I've never seen discussed , anywhere, and I've often
> wondered about it !!
> what reason is there for a specific value of resistor in a
> parasitic suppressor. ?? I have seen 50 ohms, 100 ohms, and two 50 ohm
s in
> parallel.. ! Is there a valid reason for using any particular value ??
over
> the years it seems that 50 ohms was the usual value, but today I found
in
> the amp I'm working on , a 100 ohm, two watt unit.
> Any answers out there ??? thanks !
> carl / kz5ca
A politically correct answer would say that each amplifier needs its
own suppressor, most likely you find in amplifiers all sort of
suppressors or no suppressor at all.
Often suppressors are unavoidable, but not only an effective solution
exists, there are more, so a cut and try products (something that works
with something that is available) is used with old glass tubes or
anyway with tubes that have big feedback.
More than often suppressors are instead "included" as something that
people is accustomed to find out but not really needed, the amplifier
would be inherently stable at the frequency in use, with or without
suppressors.
73,
Mauri I4JMY
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