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For most applications it's largely acedemic, but...

Posted by 6V6GT (A) on December 17, 2003 at 10:41:59

In Reply to: do tubes make a better transmitter [i.e ham and such] [nt] posted by zman on December 17, 2003 at 10:04:21:

for duplex applications like repeaters, where the transmitter is on simultaneously with the receiver, tubes are superior. SS amplifiers are "broadband" and as such have a much wider "noise bandwidth". Tube stages are mostly resonant (tuned) stages and therefore amplify much less noise and only within a narrow bandwidth.

Broadband noise from a SS transmitter has to be filtered out from the receiver input to a much larger degree than the noise from a tubed transmitter and in many cases allows the use of less filtering or more sensitive receiver stages.

Tim
I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion, and the international Communist conspiracy to sap and impurify all of our precious bodily fluids.

Gen. Jack Ripper

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