Several things about this amplifier and amplifiers in general.
That FCC certification isn't exactly the fastest, cheapest thing in the world. It takes time, and they don't do it for free. If you are serious about getting into the business, that certification is a very nice thing to have. It's also sort of limiting because 'they' tend to watch you to make certain you do things 'right'. If you have no problem with doing things right, big deal. If there are any sort of 'shady' thingys you like doing, you may not think it's worth the effort.
This particular amplifier is an import. That complicates things a lot, especially with that certification thingy. No idea what the cost of something like that process is, but you can bet it isn't free.
Strictly from the 'legal' and practical ham point of view, and since almost all HF radios are around 100 watt output anyway, it typically means that you have to reduce power to use one of these thingys. Not all that difficult to do, but for only doubling your signal's effective "hear me" power? Is it really worth the effort? I don't know, what do you think?
(And while I didn't pay any attention to the price of those amplifiers, if it's in pounds, or euros, figure on tripling it for dollars. That nasty 'cost' thingy!)
They wouldn't be worth it to me, but that's just an opinion, like something else that everyone has...
- 'Doc
