Tower Top Amplifier (TTA)
Superior receiver system performance and electrical reliability in a rugged, weather-proof design
- Seamless cylindrical aluminum housing with a durable finish to repel weather and solar energy
- Aluminum shell connector plate that provides much lower electrical resistance than competing stainless steel housings
- High permeability internal magnetic shield to protect against lightning-induced magnetic pulses
- Two drain holes to release any water due to condensation build up
- Protection provided by a 360° drip- edge
- Highly selective combline preselector that provides excellent out-of-band rejection with minimum loss
- PHEMT (GaAs FET) device technology to provide low noise performance and high intermodulation immunity
- Hybrid-coupled devices to provide amplifier redundancy and bypass capability
Frequency Range, MHz
UHF (406-512), 794-806, 792-824, 806-824, 896-902
2-3 for the UHF model
3,6,10,12 for the 794-806 MHz frequency range
32 for the 794-806 frequency range
18 for 806-824 MHz frequency range
6 for the 896-902 MHz frequency range
Noise Figure, dB
3rd Order Intercept Point, dBm
Housing Diameter, in
16 x 14 x 6 for the UHF model
6.6 for other frequency ranges
Housing Length, in
n/a for the UHF model
21 for other frequency ranges
Temperature Range, °C
-40 to +50
45 with clamps
Base Unit: Finish, Front
Base Unit: Connectors
Transmission Line, RF Output
Base Unit: Connector Type
Base Unit: Power Input, Standard
110/220 VAC 50/60Hz, 12W
Base Unit: Weight, lbs
Base Unit: DC Power (Optional)
Base Unit: Mounting
EIA Standard 19” 1 RU
Base Unit: Temperature Range, °C
0 to +50
Our Tower Top Amplifier (TTA) systems provide superior receiver system performance and excellent electrical reliability in a rugged, weather-proof design. The tower unit is housed in a seamless cylindrical aluminum housing with a durable finish to repel both weather and solar energy. The aluminum shell connector plate provide much lower electrical resistance than competing stainless steel housings, enhancing the performance of the internal lightning surge protection. A high permeability internal magnetic shield provides protection against damage from lightning-induced magnetic pulses and is many times more effective than a stainless steel enclosure.
The tower housing has two drain holes to release any water due to condensation build up. RF connections stay weather-resistant longer as a result of the protection provided by a 360° drip- edge. Superior electrical performance starts with a highly selective combline preselector that provides excellent out-of-band rejection with minimum loss. Our preamplifier uses PHEMT (GaAs FET) device technology to provide low noise performance (1.6dB typical) and high intermodulation immunity (+39 dBm OIP3).
For greater reliability, the preamplifier uses a pair of hybrid -coupled devices to provide amplifier redundancy. This circuit provides useful gain should only one device be operational. The preamp features internal transient suppression that complements lightning surge protection provided on all TTA ports.
In addition to amplifier redundancy, full amplifier bypass capability is provided. A hermetically sealed, high-reliability bypass relay will fully remove the amplifier from the circuit and provide a non-amplified connection from the antenna to keep the system up and running even if the preamplifier totally ceases operation. Bypass mode is activated when DC power to the tower unit is disabled.
The base unit is housed in a 19” rack assembly that includes the power supply and DC injector to send DC (12 V) over the transmission line to operate the tower unit. The base unit has jacks for measurement of tower unit Current using a standard digital multi-meter. Type N connectors provided. Tower unit mounting hardware included.
Building- entry lightning surge suppressor w/DC pass-thru is recommended but not supplied.
Order Information TTA-40-00 TTA-70-00 TTA-79-00 TTA-80-00 TTA-90-00 Frequency, MHz 406-512 794-806 792-824 806-824 896-902