A shorter doublet is combined with a balanced-line impedance-transforming section.
Antennas · F1SYH
G5RV Junior
The G5RV Junior applies the G5RV principle at approximately half the full-size length.
HF
Multibande
Version réduite
Operating principle
Main characteristics
Typical gain
Variable selon bande
Impedance
Variable
Polarization
Horizontale
Difficulty
Intermédiaire
Dimensions and design
A common version uses about 15.5 metres of total wire and around 5 metres of balanced line, corrected for velocity factor.
Construction and tuning
Step 1
Cut two equal legs.
Step 2
Measure the balanced section accurately.
Step 3
Keep it away from metal.
Step 4
Install a choke before the coax.
Step 5
Use a tuner when required.
Step 6
Check feed-line losses on high-SWR bands.
Advantages
- Reduced span.
- Several HF bands.
- Simple construction.
- No traps.
Limitations
- Less lower-band coverage.
- Difficult impedance on some bands.
- Tuner often required.
- Possible coaxial loss.
History and origin
The G5RV Junior is a compact adaptation of Louis Varney’s G5RV for smaller properties.
Safety
The balanced section may carry high RF voltage and must remain clear.