In article ,
"Arny Krueger" wrote:
"Peter Wieck" wrote in message
a) The 300B (or any of the 300-series tubes in any case)
weren't used in Telephoney.
Actually they were. I've scrapped out enough obsolete telephone equipment to
know that they were used for output stages in drivers for long lines, and
also as voltage regulators in power supplies.
They were used in audio
recording and playback applications for moving pictures -
and again, 10%+ distortion in actual use was neither
unexpected nor unacceptable.
Ever hear of inverse feedback? The good news is that Bell labs did, and
applied it to their equipment.
Didn't the guy that invented inverse feedback work for Bell, or am I confused?
--
Regards,
John Byrns
Surf my web pages at,
http://fmamradios.com/