Tube Feed Line Chokes

Hybrid 16:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-31 MHz, 1.5KW PEP - BBTD, T2FD, V-Beam Antenna

SKU CB-16-1-1500
$139.95
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Hybrid 16:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-31 MHz, 1.5KW PEP - BBTD, T2FD, V-Beam Antenna
Product Details
MPN: CB-16-1-1500EB/TS
Country/Region of Manufacture: USA
Input ohms/Output ohms: 50 in/800 out
Frequency Range < 2:1 SWR (MHz): 1.8-31 MHz
PEP Power Rating (watts): 1.5KW
Input Connector: UHF SO-239
Output Connector(s): Side Eyebolts (EB) or Top Studs (TS)
Enclosure Size: 4"x4"x 2"(1.5KW)
Weight (pounds): 3
Antenna Compatability: BBTD, TTFD, V-Beam, Double Terminated Dipole

After many requests we have created a compact, special balun for Terminated Folded Dipoles (TTFD), Broad band Terminated Dipole/loop (BBTD) and V beam antennas with termination resistors at each end. The CB-16-1-1500 is a CUBE(TM) enclosure containing a multi-core, broadband 16:1 impedance transformer (50 ohm coax input to balanced 800 ohm output) in series with a 1:1 current balun for extra common mode current choking to keep RF current off the outside of the coax braid and on the antenna where it belongs. The extra choking action also means that the coax feed line will not act as a radiator causing unnecessary RF interference (RFI). Rated for full 1500 watts PEP and 450 watts CW (ICAS). 1.8Mhz – 31 MHz.

CB-16-1-1500EB is housed in a 4” x 4” x 2” waterproof housing with SO-239 input and stainless steel eye bolts on the side for ease of connection to your wire antenna. Top eye bolt acts as an antenna hoist. Also available with top studs for post or wall mounting (Model # CB-16-1-1500TS)

Termination resistor for the antenna is model # TR-1000-600 for single resistor termination.

BBTD Installation by K!FU

Another BBTD Installation

TUBE feed line chokes/Line Isolators are used to suppress common mode current carried on the outside of the  coax braid which is often responsible for receiver noise and RFI in the receiver/transmitter. These chokes are very useful for suppressing RFI common mode current at the antenna feed point, at 1/4 wavelength intervals along the coax feed line and also at the entrance to the radio station.  They are available with various input and output connectors so as to conveniently connect to standard output connectors already installed on your feed line.

Palomar Engineers TUBE feed line chokes are designed to have 2-5 times more choking impedance over a broader frequency range than competitor units in similar packaging.  Each choke has the choking impedance and effective frequency range on the product label so you can choose the product best suited for your application.