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transmitter comparison

Glad Tom brought that up. I've seen that first-hand. Measure your impedence with a bridge at the current transmitter output and make damn sure it's 50 ohms 0j. If it isn't you have to either get it that way or match in the transmitter (if it has it) or get some goodies to do it. Solid state VERY unforgiving without a good match or a fine matcher in the transmitter. Also you absolutely have to have the filters on the power with any of the solid state boxes. You'll be very sorry if you don't include them in your install.
 
Surge protection...that brings up a point often overlooked. The surge protector is crippled if it is placed on a breaker! Lighting usually has several pulses of energy...the first pulse trips the breaker & the remaining ones do the very damage the protector was designed to avoid. It's vital to convince the electrician that the protector be placed on a non-fused disconnect switch across the mains. They'll tell you that it violates the electical code...tell them there's an exception for protectors. I've yet to not convince an electrcian to do it my way...and that includes union electricians from the "big" firms. Protectors come in all flavors & sizes. If it's less than about $800 for a single phase or $!200 for a 3 phase model, it may not be up to the task...especially where solid state transmitters are concerned. My fave is Lightning Protection Corporation, but there are several excellent products on the market.

The point made about a good match is a valid one. But that having been said, I have 5 BE's running & only one has tuning & loading adjustments (it's the oldest one). That one has dust on the knobs...haven't been touched in years. All of the AM antenna systems connected to the BE's (and some are far from textbook perfection) have zero to a few watts reflected power & the BE accepts it with pleasure. In theory, having a matching network could keep you on the air during a minor antenna system malfunction. But in reality, none of the 5 have ever refused to operate because of antenna issues. Generally speaking, AM antenna system with even a small amount of routine TLC are stable enough to satisfy the BE.
 
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