Thread: Dual-Z0 Stubs
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Old May 29th 09, 11:16 PM posted to rec.radio.amateur.antenna
Jim Kelley Jim Kelley is offline
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First recorded activity by RadioBanter: Jul 2006
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Default Dual-Z0 Stubs

Cecil Moore wrote:
Jim Kelley wrote:
Cecil Moore wrote:
Myths and old wives' tales die hard.


So please stop trying to invent new ones.


I'm not doing that, Jim, just trying to lay the
old ones to rest, e.g. a 3 nS delay through a
10" long 75m bugcatcher loading coil. Please
don't tell me that you believe that a 4 MHz
signal can travel through a large 10" inch
coil in 3 nS - a coil that exhibits a VF of
0.04. That's about seven times the speed of
light.


Given that the speed of light is roughly 3 x10^8 meters per second, and
it would ordinarily take less than a nanosecond to traverse the 10",
it's not *THAT* unbelievable. The delay would depend on the series
inductance and shunt capacitance of the coil. What are those numbers?

ac6xg