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May 11th, 2026 at 12:03pm
Added by forum admin...
The two SSPAs have weatherproof NEMA 4X type enclosures and may mounted outdoors at the antenna hub to to reduce waveguide losses at 14 GHz between the SSPA and the transmit port of the antenna feed. These SSPAs have been designed for reliable, trouble-free service and were in good working order when last in service. The amplifiers incorporate a microprocessor-based monitor and control system.

This first image above shows a side view of the two block up converter / solid state power amplifiers. On the undersides, on the right, are the redundant cooling fans. The mounting brackets are visible.

The second image above shows the weatherproof white upper faces.
A full technical description, drawings and specification are available here: CPI SSPA Ku band 100W datasheet (pdf)
This document also provides outline measurements as well as measurments for the four mounting bracket bolt centres.
L-band input is via an N type coax connector and output is via 14 GHz waveguide.
There is also an explanation of the part number. SPKM14100N-7 The fourth character "M" indicates the output is 14 - 14.5 GHz. The 7th to 9th characters "100" indicate 100W output power. The final character "7" indicates that it is a block up converter with an L band IF input.
Regarding output power, these SSPA have the following specification: Saturated outut power 100W P1dB output power 85W Linear power (IMD = -25 dBc with regard to the sum of both carriers) 42.5W
If you intend to operate simultaneous multiple transmit carriers note the linear power spec.
On my satsig web site is an educational page about Satellite uplink BUC transmit power
Do contact the seller by email: netvsat55@gmail.com if you are interested.
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