These are some of the ATV Transmitter's and downconvers I use at my shack. The 915 Mhz transmitter and the 1.2 Ghz tranmitter's were built by me in my shop. The electronics are Mobicom, the rest is cellular surplus or DEMI.
The 915 tx is a Mobicomm low power transmitter feeding a modified surlpus cellular amplifier. Stripped and retuned for amateur frequencies.
The 1.2 Ghz tx is a Mobicomm tx and a DEMI 1.2 ghz 35 watt brick amp.

915 Mhz Tx, inside view during construction
915 Mhz tx, front side view