Picked up a 220 radio, a Yaesu ft-190rh for extremely little the other day, came with just the stock whip. If I hook it up to my dualband whip, should I have any issues, assuming swr is reasonable? Figured since it is pretty well right between the two bands, there shouldn't be a problem, but just curious if anyone had any experience with a similar situation.
220 on a 144/440 dualband antenna?
- Thread starter CLynch7
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220 use on 144/450 antenna
The 144/440 antenna segments are roughly in a seperately resonant conditions under an approximately 1:3 ratio. There is no 220 mhz resonant component in dual-band antennas.
In a whip antenna, for instance, a 19" whip is resonant at 144 Mhz as a 1/4 wave radiator - at 440 band it would be a 3/4 wave and still be close to resonant. Not on 220
Again these are rough, not exact numbers or exact multiples in the example, but the bottom line is that the use on 220 would not be recommended.
73
Wouff
It may seem feasible, but it is not - the 220 band IS between the 144 and 440 bands, but it is not a linear thing.
The 144/440 antenna segments are roughly in a seperately resonant conditions under an approximately 1:3 ratio. There is no 220 mhz resonant component in dual-band antennas.
In a whip antenna, for instance, a 19" whip is resonant at 144 Mhz as a 1/4 wave radiator - at 440 band it would be a 3/4 wave and still be close to resonant. Not on 220
Again these are rough, not exact numbers or exact multiples in the example, but the bottom line is that the use on 220 would not be recommended.
73
Wouff
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