Atm Inc. - W/G Components -> Terminations (Dummy Loads)

Water Cooled Load, High Power - 770 Series

Units are pressure sealed up to 30 psi.
Finish: Chem-Film-Iridite
Low out-gassing characteristics.
VSWR: 1.15 max.
Series 770 Terminations are manufactured from 6061 Aluminum.
ATM Series 770 Terminations utilizes High Power Ceramic Elements fired at 1300 C for low VSWR and stable electrical characteristics.
Cooling Fluid Flow Rates: 4 gal/min for sizes WR650 thru WR159, 2gal/min for sizes WR137 thru 112, and 1gal/min for sizes WR90 thru WR22 to achieved rated performance.
Cooling Fluid Flow Temperature: Cooling fluid entering Load should be 15° to 21° C to achieve rated performance.

WG Size

Freq. (GHz)

Avg. Power
(Watts)

Standard
Model No.*

Dim. A
(Inches)

Dim. B

Dim. C

Outline
Dwg.

WR284

2.60 - 3.95

7000

284-770-6

WR229

3.30 - 4.90

1200

229-770-1200-2

.pdf

WR229

3.30 - 4.90

1200

229-770-2

WR187

3.95 - 5.85

4200

187-770-6

WR159

4.90 - 7.05

4200

159-770-2

WR137

5.85 - 8.20

4200

137-770-2

20.25

5.00

3.75

.pdf

WR112

7.05 - 10.0

2700

112-770-6

WR90

8.20 - 12.4

2100

90-770-6

WR75

10.0 - 15.0

2000

75-770-6

9.63

1.75

2.75

.pdf

WR62

12.4 - 18.0

2000

62-770-6

WR51

15.0 - 22.0

1700

51-770-6

9.63

1.75

2.75

.pdf

WR42

18.0 - 26.5

1500

42-770-6

WR34

22.0 - 33.0

800

34-770-6

WR28

26.5 - 40.0

500

28-770-6

WR28

26.5 - 40.0

700

28-770-6

WR22

33.0 - 50.0

700

22-770-6

Ordering Information	WR	- Mod	- F
Termination, Medium Power
Example part number:	75	-770	-6
Waveguide Size: (WR) WR22 thru WR650
Basic Model No.: (-Mod)
Flange (-F): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke See ATM Standard Flange page for more info.

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered to accommodate your needs by using the Model # code system to the left.

Water Cooled Waveguide Terminations

(Dummy Loads)