John Smith wrote:
Cecil Moore wrote:

---43.4 deg 600 ohm line---+---10 deg 100 ohm line---open

---43.4 deg 300 ohm line---+---10 deg 50 ohm line---open

So how long does the 600 ohm line have to be in the following
example for the stub to exhibit 1/4WL of electrical length?

---??? deg 600 ohm line---+---10 deg 50 ohm line---open

Strange, for the 600/100/10 degree I get:

Arctan(100\600)*(1/tan(10)) = 53.6635

for 300/50/10 degree:

Arctan(50\300)*(1/tan(10)) = 53.6635

and for 600/50/10 degree:

Arctan(50\600)*(1/tan(10)) = 27.0160

What am I missing here?

Your calculator is not missing anything. Hard to
tell what you are missing. :-)

Arctan(50\600)*(tan(80)) still equ 27.0160

Don't tell me the calc is on the fritz!

Nope, but your brain seems to be. Everything
above is correct.
--
73, Cecil http://www.w5dxp.com