The T2LT antenna is a dipole working on 28 MHz, but it can be scaled to other bands as well. It is often used on the CB-band (27 MHz).
The advantage of the T2LT antenna is the feeding method. It is a center-fed dipole, and it works without radials. Other antenna types for 28 MHz require radials which can be difficult to accomodate. The T2LT antenna has a slim profile and can be mounted almost anywhere!
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| Figure 1. T2LT antenna for 28 MHz. |
The dipole has two radiating parts, L1 and L2. L1 is the inner conductor (outer jacket and shielding was removed). L2 is coax cable (nothing was changed). The dipole is fed at the center (FP in figure 1). The function of the coil is to separate the antenna part (L1 and L2) from the coax cable, which goes to the transceiver. The coil prevents RF from running on the outside of the cable.
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| Figure 2. Coax cable coil. |
The coil is shown in figure 2. It has 16 windings of RG58U on a 75 mm plastic coil former.
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| Figure 3. The antenna is mounted vertically. |
Figure 3 shows how my antenna is taped to a vertical wooden pole. The pole is 5.5 meters long and attached to a concrete block (the block is normally used for retaining a parasol).
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| Figure 4. My WSPR signal reached four continents. |
Figure 4 shows how far my 5 watt WSPR signal reached on 29. and 30. of April. It seems like my T2LT antenna works fine for DX!
73 from OZ1BXM Lars Petersen
Visit my homepage here: A Tiny QRP Page by OZ1BXM
