Off topic a bit what would be a realistic output expectation on an linear that has 4 MRF454’s like this one has I looked up the specs of the MRF454’s and they look to be rated at 80 watts each. I use to have one just like this in the early 80’s but don’t remember what that one did. I don’t know where the manufacture came up with the stated output power printed on the front face.. 400AM PEP 750 SSB PEP those numbers make no sense to me.