For additional information on CPI MPP products contact:

CPI MPP, Helix TWT Operation - 811 Hansen Way, Palo Alto, CA 94303-0750

400 W, CW Helix TWT Series, 13.75 GHz to 14.5 GHz, Periodic-Permanent, Magnet

Custom configurations are also available. These variations in the performance and

configuration include: mechanical configuration, electrical and RF connections, & dual

stage depressed collector.

PICTURE

Features

•

400 Watts

•

PPM Focusing

•

Coaxial Input

•

Waveguide Output

•

Any Mounting Position

•

Weight: 9 lbs. max (6.3 typical

2.6 kg)

•

Conduction Cooled

•

Dual Stage Collector

Operating Parameters

Heater

Voltage

Heater

Current

Heater

Surge

Current

Helix

Voltage

Collector

Voltage

Collector

Voltage

Cathode

Current

Parameters:

Ef

If

If

(surge)

Ew

Eb1

Eb2

Ik

Units:

V

Adc

A

kVdc

kVdc

kVdc

mAdc

Maximum:

6.5

1.8

5.0

9.0

0.52 Ew

0.34 Ew

310

Minimum:

6.1

1.0

- - -

8.2

0.48 Ew

0.30 Ew

- - -

Typical:

6.3

1.3

<5.0

8.8

0.50 Ew

0.32 Ew

280

Helix

Current

Drive

Power

Cathode

Warm-

Up Time

Load

VSWR

Baseplate

Temp.

Collector 1

Current

Collector 2

Current

Parameters:

Iw

Pd

tk

Ib1

Ib2

Units:

mAdc

mW

minutes

°C

mA (dc)

mA (dc)

Maximum:

10

50

- - -

1.5:1

120

175

310

Minimum:

- - -

- - -

3

- - -

- - -

- - -

- - -

Typical:

<5.0

1.0

3

1.2

85

130

145

Model Number

Frequency

Power Output

(GHz)

(Min.)

VTU-6395M1A

13.75 - 14.5

400 W

VTU-6395M7A

13.75 - 14.8

400 W

The values listed above represent specified limits for the product and are subject to change. The data should be used

for basic information only. Formal, controlled specifications may be obtained from CPI for use in equipment design.