Mast Head Amplifiers/Tower Mount Amplifiers (MHA/TMA)
Used to amplify the signals to make up for long cable runs between Panels and BTS equipment.
Commscope MHAs
Very commonly seen, especially on new (4G) EE/3 masts. Commscope website here.
Commscope MHAs on an MIP mast. The 800MHz MHA is the largest, with the 2100MHz being the smallest.
The 800MHz MHA looks to be a Commscope E15R02P11
The 1800MHz MHA looks to be a E15S09P series.
The 2100MHz MHA looks to be a E15S08P series.
Commscope 2600MHz MHAs. Appear to be series E15S02P
Commscope 1800MHz MHAs on an EE/3 Mast. Also radio design (see below table)
Commscope 800MHA up close.
Radio Design
Dual Band 1800/2100MHA is the only regularly seen.
Powerwave
Generally only seen on older sites. Appear to support 1800MHz and 2100MHz.
A Powerwave MHA wired for 1800 (red tags)
Up close!
Nokia MHAs
Again, generally seen on older sites.
Nokia MHAs on an EE/3 2100MHz mast.
A Nokia Siemens Networks MHA for O2 2100MHz.
Others
A dual band amp of unknown origin.
An Ericsson MHA for Vodafone 2100MHz.