- I also have the LNR MTR5b dark gray transceiver and an Elecraft T1 tuner that I use on a 40-
**10**TrueLadderLine**antenna**which works great too. I just ordered the new, red, LNR MTR4b v2.3 transceiver and would like to add a second wire to the LNR EF-MTR that uses a stub to short out**antenna**for using 30**meters**, or no stub for 20 and 40**meters**. - working on two bands with one feed line: The
**10****Meter**and 6**Meter**ham Bands. 10N6RDB**Antenna**In the pictures the bottom horizontal Aluminum tubing is a half-wave dipole tuned to**10****Meters**that is all set to be fed with your 50 ohm coax. Inside the box is a 50 ohm 1:1 Balun. One of the problems with feeding and half-wave center-fed dipole **Antenna**modeling suggests that the impedance is closer to 1800 ohms depending on the "counterpoise" length used. As the "counterpoise" itself approaches a half wavelength, the impedance approaches 5000 ohms. In the graph below I have plotted what MININEC predicts for the impedance of an end fed half wave**antenna**versus the ...- The
**antenna**impedance matching components (BOX "Z" above) to match the**antenna**impedance to the coax line impedance (usually 50 ohms). For non-resonant end fed**antennas**, the typical feed point impedance is 300 to 600 ohms and a 9:1 impedance transformer (e.g. 450 ohm average**antenna**impedance to 50 ohm coax, also know as a 9:1 unun). - •20
**meters**and above or 80**meters**and above •Radials required •Tuner required •Remote tuner at the base is best . Lots of other Verticals S9v JR, only 18 ft and $50 ...**Inverted**L Wire**Antenna**•Remote tuner required •Should not be a resonant length •70 or 140 ft recommended tuner Ground & radials Coax to rig