A question never seen addressed

Mike Feher n4fs at MONMOUTH.COM
Tue Nov 24 10:58:48 EST 1998

In addition to the fact previously mentioned, that there were a few
broadbanded ham rigs, the whole thing has to do with linearity and impedance
matching. Linear amps are typically not as efficient as their class C
counterparts so the harmonic and intermod products generated in the tuned
rigs were minimized by the tuned circuits. Even the solid state amps
typically have band pass filters after them to keep harmonic content to an
acceptable level. Transforming the relatively high output impedance of a
tube circuit to 50 ohms without a tuned circuit used to be pretty difficult
and probably still is. Transforming the low output impedance of transistor
to 50 ohms on the other hand is a lot simpler. Especially with the advent
and popularity of new ferrites and broadband impedance matching
transformers. Also a lot of the simpler earlier rigs depended on this
nonlinearity for frequency multiplication in the driver and even the final
stages. Hope this simplified explanation helps. 73 - Mike

Mike Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731

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