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I can’t seem to get my head around this so I am seeking Guru level advise here:
I am stacking 2 yagis: a 2m and a 440 Yagi on 1 mast (with a heavy’ish duty rotator)
I have the physical stacking distance worked out and clear in my head.I can’t seem to work out how to power split so that I have 1 feedline from the shack, and yet i match up to the 50 ohm feedline (lmr 400). Most google foo leads me to phased stacks, but that’s not what I am doing.
I don’t want to put a post mounted switch of some sort if I can avoid it, and I especially don’t want to run 2 feedlines.Gurus please enlighten me.
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73 de k1jbd
bammiHello Bammi,
The solution is a duplexer, some call it a diplexer.
It has a connector for 2m/70cm, a connector for 2m and a 3rd connector for 70cm.
It is bidirectional and can be used to separate the two bands on one feed to two separate feeds which what you are looking for.
It can also be used combine two bands onto one feed.
DX Engineering and HRO stock them.
73
Hamilton
Here is an example;
It is a high pass filter and a low pass filter with a common connection which is why the frequency range of the ports can be so wide.
They are not directional, you can RX or TX from the common to a port or a port to the common.
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