Description
Varian VKU-7791Z8 Klystron RF Tube Ku-Band 1.5kW Satcom 8-Ch 17.3-17.7 GHz
Ku-Band klystron RF power tube rated at 1.5 kW output. Operates across 8 active channels in the 17.341–17.761 GHz range for satellite uplink applications.
Specifications & What's Included
- Frequency Range: 17.341–17.761 GHz (8 active channels)
- Output Power: 1.5 kW
- Beam Voltage: 9000 Vdc
- Beam Current: 0.93 Amps
- Heater Voltage: 6.5 Vdc / 2.5 Amps
- Body Current (No Drive): 2.0 mA
- Manufactured in United States
Applications
Klystrons of this type are used in satellite earth station uplink systems for SATCOM transmission. The Ku-Band frequency range is standard for commercial and government satellite communications networks. These tubes have been deployed in fixed-site satcom ground stations and teleport facilities where sustained RF power transmission is required for data, voice, and video uplink to orbiting satellites.
Condition: Used
This Varian VKU-7791Z8 Ku-Band klystron RF tube was pulled from a working satcom system where it was in active use. It has been inspected and appears to be in good physical condition. Important note for buyers: klystron tubes that have been in storage for an extended period can gas up, meaning the vacuum inside the tube can degrade slightly. These tubes typically need to be brought back up slowly — gradually increasing the beam voltage over time before returning to full operating conditions. This is a well-known process for klystrons coming out of storage and does not necessarily indicate a defect, but buyers should plan accordingly. Please view our photo set and contact us if you have any questions.
This Varian VKU-7791Z8 Ku-Band klystron RF tube was pulled from a working satcom system where it was in active use. It has been inspected and appears to be in good physical condition. Important note for buyers: klystron tubes that have been in storage for an extended period can gas up, meaning the vacuum inside the tube can degrade slightly. These tubes typically need to be brought back up slowly — gradually increasing the beam voltage over time before returning to full operating conditions. This is a well-known process for klystrons coming out of storage and does not necessarily indicate a defect, but buyers should plan accordingly. Please view our photo set and contact us if you have any questions.
Warranty Information
We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose
Additional Information
Brand: |
Varian |
Model: |
VKU-7791Z8 |
MPN: |
VKU-7791Z8 |
Type: |
Klystron RF Tube |
SKU: |
31849 |
Frequency Band: |
Ku-Band |
Frequency Range: |
17.341 – 17.761 GHz (8 active channels) |
Number of Channels: |
8 |
Output Power: |
1.5 kW |
Beam Voltage: |
9000 Vdc |
Beam Current: |
0.93 Amps |
Heater Voltage: |
6.5 Vdc |
Heater Current: |
2.5 Amps |
Focus Current: |
N/A |
Body Current No Drive: |
2.0 mA |
Heater Wire Color: |
Yellow |
Heater/Cathode Wire Color: |
White |
Application: |
Satellite Uplink / SATCOM Earth Station |
Country/Region of Manufacture: |
United States |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Pulled from working satcom system; tube may need slow conditioning after storage |
Condition Notes: |
Varian VKU-7791Z8 Ku-Band klystron pulled from a working satcom system. Good physical condition. Note: tube has been in storage and may need slow conditioning (gradual beam voltage ramp-up) before full operation — standard practice for stored |