Description
CPI VZC6967AM 700W C-Band TWT BUC appears to be unused except for time spent testing.
It is as clean as a pin on the inside and shows 596 Beam on hour and 669 Heater hours. CPI installed a BUC on the input effectively converting it to a hour power BUC. They also sold this amplifier with a built in linearizer ensuring accurate output of the entire frequency range of 5.845-6.650 GHz.
RF Output Power
- 750 W peak power class
- Rated output at TWT flange: typically 700–750 W
- Linear output: ~350–450 W depending on linearizer and backoff
- Meets IESS‑308/309 phase noise and linearity requirements
We sent it to our engineer facility with instructions to test and report any failures
Equipment Repairs-CPI VXC6967AM serial #C11620L9 rack mount c-Band s/BUC.
Complaint: Check for proper function
Evaluation: Unit powers up ok with occasional flicker on standby LED. L-Band input not requiring 10 mhz. Reference. L to C conversion 2.5 above normal. Spectral regrowth 320 watts or better with C/I @ 28 db. for most of bandwidth.
Repairs-TWT: no repairs needed, all tests completed successfully
Test-Linearizer: no repairs needed, settings OK and at gain=0, phase=88 and ampl=13.Tested into dummy load up to 440 watts modulated qpsk 6.2 mhz sym-rate @3/4 fec.Helix 1 from 0.5 ma going from low to high power.Input -20 dbm L-Band
Beam on hours: 596 Heater on hours: 669
Tested at 240 VAC
