It uses a pair of 6JB6A pentodes (intended for 30MHz max frequency), and the original output power was something like 80-150W with drive from a 4-12 watt multimode CB/10m rig (although >15W drive would produce somewhere near to 200W). English versions come with a 240V AC mains input on transformer primary, but I guess that 120V versions were also made. In any event, the transformer secondary voltage is approx 300V AC.
These amps still appear at radio rallies and also on e-Bay on-line auctions. Prices vary,. e-Bay is a good source, but sometimes enthusiastic bidders tend to push the price up to silly levels. This has happened over the last months with brl200 owners finding there is an outlet for redundent cb linears to be sold.I paid £100 for mine May 2010 taking also the chance on soft valves not being present in the unit this is still a good price for a decent unit.Once aligned,10W drive achieves 50-80W output, or 15-20W drive can easily reach the full 150W.
Mine reached 100W with a 20W drive,bit more tweaking required.My rig is a Yaesu FT847 with power mod capable of 85w on 4m but nice to run the rig on lower power. This can be increased to higher input power to run linear up to full power of 160W output for short duration use is possible, which is the UK legal power limit Using 15-20W input, the amp will run nicely at 100W output.
My thanks go to Ian M0BCG for information on http://www.70mhz.org/bremi.htm on the 4M webside for which my project would not have been possible.