Hughes 1177/1277 General Specification


Contact Dudley Lab ---- Go/Return to Dudley Lab Main Page

The five models in the Hughes 1177/1277 Series of Standard Band Traveling Wave Tube Amplifiers cover the 1 to 18 GHz frequency range with a minimum power output of 10/20 watts CW. Each amplifier consists of a PPM metal-ceramic traveling-wave tube, a regulated solid state power supply and complete air cooling system assembled within a compact instrument case. The 1177/1277's light-weight compactness makes it ideal for either bench or 19-inch rack mounting. This size-weight feature is the result of the unique circuit design. The 1177/1277 has a wide variety of uses in such applications as EMI testing, antenna testing, communications, component testing, system testing and general laboratory requirements.

Dudley Lab

Product Specifications:

Model Number Pout Watts TWT Type Frequency GHz Nominal Gain dB. RF Connectors
1177H09 10 417HD 1.0 - 2.0 30 N (f)
1177H10 20 - 1.4 - 2.4 special build 30 N (f)
1177H01 10 564H 2.0 - 4.0 30 N (f)
1177H13 10 646 3.0 - 8.0 30 N (f)
1177H02 10 640H 4.0 - 8.0 30 N (f)
1177H03 10 771 8.0 - 12.4 30 N (f)
1177H04 10 848 12.4 - 18.0 30 N (f) or WR-62
1177H05 20 - 2.5 - 4.0 special build 30 N (f)
1177H07 10 771 6.5 to 13.5 30 N (f)
1177H08 10 - 10.5 - 18.0 30 N (f)
1177H16 10 664 7.2 - 8.4 30 N (f)
1177H17 10 783H 7.0 - 16.3 30 N (f)
1177H15 10 846H 8.0 - 18.0 30 N (f)/WRD650
1077H11 1 911H 18 - 26.5 30 WR-42
- - - - - -
1277H09 20 - 1.0 - 2.0 30 N (f)
1277H01 20 568H 2.0 - 4.0 30 N (f)
1277H02 20 640H 4.0 - 8.0 30 N (f)
1277H03 20 783H 8.0 - 12.4 30 N (f)
1277H04 20 848H 12.4 - 18.0 30 N (f) or SMA (f)


Gain: 30 dB minimum
Duty: CW
InputVoltage: 120 Vac +/- 10% Input Frequency 50/60 Hz
Power Consumption: 250 W
Noise Figure: 35 dB maximum
Spurious Modulation (at saturation): -50 dB minimum
VSWR: 3:1 maximum

Hughes 1177/1277 (10/20 Watt) Series Available Options:
OPTION A - 220/240 VAC Prime Power.
OPTION B - DC Heater Supply - Reduces spurious content.
OPTION C - Helix Voltage Regulator - Reduces gain variation due to temperature effects.
OPTION D - Unattended Protection - Turns off all power in the event of helix overload.
OPTION E - Rack Mount
OPTION F - Local/Remote Provides remote control of the amplifier.
OPTION G - 48 to 420 Hz Line frequency.
OPTION H - TTL Remote Interface.
OPTION 1 - 28VDC Prime Power.
OPTION J - Output Isolator Protects the TWT from high VSWR conditions. (amplifier may have slightly lower output power)
OPTION K - High Gain, adds SS amplifier.
OPTION L - Automatic Reset from "Ready" to RF ON".
OPTION M - -48VDC Prime Power.


Contact Dudley Lab ---- Go/Return to Dudley Lab Main Page


Page Design by Webmaster/