Requires + 50 volts at high current and +15 volts bias at very low current; slightly lower drain voltage should be just fine. This amplifier was designed to run 24 hours per day, 365 days a year, so it's conservatively designed, and should be capable of a lot more output power, if you cool it properly. Each amplifier is very clean and undamaged.
Requires a good 50 ohm load on the output and a bunch of air blowing out of the large built-in heat-sinks.
There is a thermistor mounted in each heat sink to reduce the bias, if the temperature gets too hot. Air flow and a proper load are a must, or you may ruin the amplifier.
Should make a really good 6 or 4 meter amplifier or could be used for other purposes in the low VHF band. There are several extensive articles about these amplifiers on the internet; please look up Harris Platinum amplifier. This also could be modified for other frequency bands including the FM band (is not FCC certified for use in the US as a stand-alone amplifier), but I don't offer any data or guarantees for other than amateur radio use.
What you are getting is a working, professionally made linear high power wide-band linear amplifier, with built-in protection; a bias network and 4 large heat-sinks. You may need to change the wideband RF components to change frequency, based on your needs.
I would be very happy to try to answer any questions.
Your amplifier will be well packed to avoid shipping damage, and quickly shipped (usually on the same day, via FedEx in the USA), after payment is received. The amplifier weighs over 28 pounds, but the front handle assembly, may be easily removed and that would reduce the shipping weight by about 3.5 pounds. It really doesn't serve any useful purpose for most users. Excess shipping paid, will be refunded to the buyer. I don't profit from shipping costs.
The limited documentation that I have will be included, as will be the mating rear power and RF connectors with RG-393 Teflon coax.