Engelmann Microwave Company Model A802N.  Has Type N(m/f) connectors. Removed from working test system.

The HP 33320H is configured for designing into microwave systems and instruments.  It has SMA connectors and covers a range of DC to 18 GHz.  Permanent magnet latching design and automatic dc current interrupts simplify programmable drive circuit design.  It features fast-switching solenoids; attenuation programming is done through a 12-pin (Viking TBR12-101V) connector

 HP 8491B DC to 18 GHz 10 dB Attenuator

Has Type N connectors.  SWR (Max): 1.2 (dc to 8 GHz), 1.3 (dc to 12.4 GHz),  1.5 (12.4 to 18 GHz).  Maximum input Power: 2 W (100 W Peak).

Has APC-7 Connectors.  SWR (Max): 1.15 (dc to 8 GHz), 1.25 (dc to 12.4 GHz),  1.35 (12.4 to 18 GHz).  Maximum input Power: 2 W (100 W Peak).

1 3 dB available

2 10 dB available

1 20 dB available

 

Merrimac ABM-31-30 Variable Attenuator

Panel mountable - "Screw Drive".  Center frequency 30 MHz,

Frequency range 25.5 - 34.5 MHz.  SMA (f/f) connectors.

The Narda 774-3 attenuator was designed to provide maximum operation under conditions of severe shock and vibration. It is bidirectional with a Type N male connector on one end and a female Type N connector on the other end.

Texscan model PA5007 is a high accuracy, DC to 1300 MHz, BCD programmable step attenuator with a range of 0 to 125 dB, in 1 dB steps, and an impedance of 50 Ohms.  It is BCD (10 bit) programmable through a standard 25 pin DB-25 male connector, with an accuracy of 0.2 dB to 1 GHz and 0.3 to 1300 MHz. The activating voltage is 12 Volts. It has SMA(f) connectors; a female DB-25 connector is included.

Attenuation Bits (Cells): 1, 2, 4, 8, 10, 20, 20, 20, 20, 20
Insertion Loss: 2.5 dB @ 500 MHz, 3.8 dB @ 1000 MHz, 6.0 dB @ 1300 MHz
VSWR (Max): 1.2 @ 500 MHz, 1.3 @ 1000 MHz, 1.5 @ 1300 MHz
Current (mA/Bit): 15
Average Power Handling Capability: 0.5 Watt
Peak Power Handling Capability: 750 Watt, 3µ sec. pulse
Switching Speed: 6 milliseconds

 

Weinschel Model 17 DC to 18 GHz 3 dB & 6 dB Attenuator

Average Power: 5 Watts

Peak Power: 1 kW

VSWR: 1.10-1.20 (varies with frequency)

Connectors: 7 mm (APC-7)

The following description was copied from the 1989 Lucas Weinschel Inc. catalog:

 

Weinschel 41-2-12 10-Watt DC-18 GHz Fixed Attenuator

 

Weinschel 41-3-12 3 DB DC-18 GHz 10 Watt Fixed Attenuator

Power Capability - Average input power rating is 10 watts.  Peak power
rating is 1 kW maximum

Wide Temperature Range  -55°C to 125°C.  Full rated power to 25°C.  Derated linearly to 0 watts at
125°C.

Quality SMA  Connectors - injection molded connector insulators maintain concentricity while
permitting up to 10 pounds of axial force on the center conductor.  An all-spring contact
arrangement eliminates the use of epoxy or solder.

Uniform Phase Characteristics - Excellent phase linearity with frequency, and typical unit - to unit
tracking of ±5°.

Rugged Construction - Designed to meet the shock and vibration requirements of MIL-A-3933.

Stability - Low temperature and power coefficients. Artifically aged to provide high stability under
normal as well as extreme operating conditions.

 

Weinschel Model 626-3 DC to 1 GHz 3 dB Attenuator

Flat attenuation up to 1 GHz.  Type N connectors.

 

Weinschel Model 650-20 DC to 5 GHz 20 dB Attenuator

Flat attenuation up to 5 GHz.  Type N connectors.