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RF Transmitter/Receiver Distance

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dr pepper

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Most Helpful Member
Thats a very good point.
If you can position the 'whip' above or below the tank.
 

ibwev

Member
I have redesigned the PCB to accept a 1/4 wave whip or a folded dipole. I will secure the antenna of choice to the component labeled "Ant".
PCBMoistureCircuit.jpg
1) When I try the folded dipole, how long should the length labeled "X" be?
Folded Dipole.jpg

2) Should 10 gauge copper wire work for making the folded whip?
 

MikeMl

Well-Known Member
Most Helpful Member
**broken link removed**

Unlikely that your transmitter will accommodate loads from 70Ω (simple dipole) to 300Ω (folded dipole) without adjustment (or a matching section).

Put it another way: a transmitter designed to match a 50Ω antenna will be ok with a 70Ω dipole, but much less so trying to drive a 300Ω folded dipole.
 
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dr pepper

Well-Known Member
Most Helpful Member
I think it would still work, however the above is correct the impedance would make the range pants, unless you had a matching transformer or in this case an un/un which is getting silly, Nige's comments were spot on.
 
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