Signal generator amplifier using only positive pole output, underperforming

[quckwire]

I have a 100W 50 ohms signal generator amplifier with a 35 meters coil wire (1.5 mm) as a load, BNC connectors. The requirement is that only the BNC POSITIVE pole is connected to the wire and used as antenna. The amplifier require a minimum of 4 ohms load. This is not a closed circuit antenna, although the negative pole touches the end of the antenna, isolated electrically.... yet no closed circuit. The problem is that I'm consuming only 10W (tested with a Tuya socket) out of maxim 100W capacity, and the amplifier's radiator is heating normally to overheating. It does the job, but how can I get more juice out of it, not only 10W measured output ?

 

[DPG]

I have a 100W 50 ohms signal generator amplifier with a 35 meters coil wire (1.5 mm) as a load, BNC connectors. The requirement is that only the BNC POSITIVE pole is connected to the wire and used as antenna. The amplifier require a minimum of 4 ohms load. This is not a closed circuit antenna, although the negative pole touches the end of the antenna, isolated electrically.... yet no closed circuit. The problem is that I'm consuming only 10W (tested with a Tuya socket) out of maxim 100W capacity, and the amplifier's radiator is heating normally to overheating. It does the job, but how can I get more juice out of it, not only 10W measured output ?

If you don't match the load to the output impedance requirement of the amplifier you won't get maximum power transfer to the load. You have effectively provided the amplifier with an infinite impedance load. You may well also damage the amplifier.

Could you not calculate the length of wire which will give a suitable resistance when connected across the amplifier output?