On Mon, 23 Jan 2006, Uncle Peter wrote:


"YT" wrote in message
t...
120 watts on AM you get about 450 Watts or so out.

No seriously, what the F*** are you talking about???



A 120 watt fully-modulated carrier has a PEP of about 480 watts.
It really doesn't mean much...

Pete



My understanding of AM transmitter technology would estimate that a 32v3,
with ~120 DC input (two 6146s, or were they still using one 4D32?) would
have at most (class C, plate modulated) 70% X 120 = 80 watts of CW carrier
output. 60 watts of audio on that final tube (as a non-linear high level
mixer) will at best, double the _instantaneous_ (peak) input voltage,
therefore power to 240 watts (plate current will _not_ double even if the
plate voltage doubles on peak audio cycle [look at your tube curves again
of iP vs vP at constant biases]) which you could only attempt to measure
with an oscilloscope. Peak output? Could it be more than 240 x 0.7 = 168
watts? I doubt it (unless he's got something like "super-modulation" in
the rig).