Description
Keltec Florida CR683-75 C-Band TWT Amplifier Thomson-CSF TH3641 TWTA 5850-6425MHz
C-Band traveling wave tube amplifier (TWTA) manufactured by Keltec Florida in 1986. Operates in the 5850–6425 MHz frequency range with rated output power of 48.75 dBm and requires +6.4 dBm drive power.
Specifications & What's Included
- Model: CR683-75 / Secondary Model: 863000
- TWT Tube: Thomson-CSF TH3641
- Frequency Range: 5850–6425 MHz (C-Band)
- Output Power (rated): 48.75 dBm
- Drive Power: +6.4 dBm
- Filament Hours: 829 (meter-read)
- RF Connectors: SMA/coax (input J3, output J4)
- Cooling: Rear-mounted fan
- Front panel controls and indicators including helix current meter, thermal monitoring, and elapsed time meter
Applications
C-Band TWTAs were standard components in satellite ground station uplink systems and telecom transmitters. This unit type provided high-gain RF amplification for uplink signals to geostationary satellites. Commonly integrated into larger earth station transmit chains where signal conditioning and linear amplification were required across the C-Band frequency allocation.
Condition: For Parts or Not Working
This Keltec Florida CR683-75 C-Band Traveling Wave Tube Amplifier powers on but produces no RF output and is being sold as-is for parts or repair. The filament elapsed time meter reads 829 hours on the Thomson-CSF TH3641 TWT tube (D/C 84-21, S/N 366-011). The unit powers up and the front-panel indicators and controls appear functional, but no RF output is present at J4 or J5. The chassis is complete with all internal components visibly intact, including the TWT tube assembly, main control board, and Sprague Powerlytic filter capacitor. It has not been bench-tested beyond confirming power-on behavior, and no output performance can be guaranteed. The unit is sold strictly as-is — no functionality warranty is expressed or implied. Please view our photo set and contact us if you have any questions.
This Keltec Florida CR683-75 C-Band Traveling Wave Tube Amplifier powers on but produces no RF output and is being sold as-is for parts or repair. The filament elapsed time meter reads 829 hours on the Thomson-CSF TH3641 TWT tube (D/C 84-21, S/N 366-011). The unit powers up and the front-panel indicators and controls appear functional, but no RF output is present at J4 or J5. The chassis is complete with all internal components visibly intact, including the TWT tube assembly, main control board, and Sprague Powerlytic filter capacitor. It has not been bench-tested beyond confirming power-on behavior, and no output performance can be guaranteed. The unit is sold strictly as-is — no functionality warranty is expressed or implied. 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.
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Additional Information
Brand: |
Keltec Florida |
Model: |
CR683-75 |
MPN: |
CR683-75 |
Secondary Model: |
863000 |
Type: |
Traveling Wave Tube Amplifier (TWTA) |
TWT Tube Model: |
Thomson-CSF TH3641 |
Frequency Range: |
5850–6425 MHz (C-Band) |
TWTA Drive Power: |
+6.4 dBm |
TWTA Output Power (rated): |
48.75 dBm |
Filament Elapsed Time: |
829 hours (meter-read) |
RF Input Connector: |
J3 (front panel, SMA/coax type) |
RF Output Connector: |
J4 (front panel, SMA/coax type) |
RF Output Monitor: |
J5 (front panel) |
Remote Connector: |
J2 (multi-pin circular, front panel) |
Power Input Connector: |
J1 (multi-pin circular, front panel) |
Front Panel Indicators: |
Helix Current meter, High Temp Alarm, Thermal O/L, Helix Current, Summary Fault, Operate, Standby, Time Delay, Power On lamps |
Front Panel Controls: |
Operate, Standby, Power On switches; Reset/Standby; Prime Power Circuit Breaker; Gain Adjust |
Elapsed Time Meter: |
Filament hours counter (mechanical totalizer) |
Cooling: |
Rear-mounted fan |
Form Factor: |
Benchtop / Rackmount chassis |
Manufacturer: |
Keltec Florida, a Division of Amstar Technical Products Co. Inc. |
Date Code: |
8636 (week 36, 1986) |
MFR Code: |
09062 US |
Part Number: |
863000 |
Application: |
C-Band satellite uplink, ground station TWTA |
Condition: |
As-Is / For Parts or Not Working |
SKU: |
31565 |
Country/Region of Manufacture: |
United States |
Seller Notes: |
Powers on but produces no RF output. Sold as-is for parts or repair. |
Condition Notes: |
Keltec Florida CR683-75 C-Band TWTA powers on but has no RF output. Sold as-is for parts or repair only. TH3641 tube reads 829 filament hours. Not guaranteed functional. No returns on as-is items. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
