Good morning. I have assembled a Chinese 100m fm amplifier kit with an MRF186, and I am in the following problem: The current consumption with 24.5v, and a 7w excitation, does not reach 2A, only from the amplifier. In addition, by adjusting the bias voltage between the maximum and the minimum, the consumption and output power hardly vary. The exciter is an adjustable power transmitter, 1w, or 7w; with 1w, the amplifier is not excited at all. The bias voltage, without exciting the amplifier, varies between 0 and 2.8v. I don't have a wattmeter to measure the output power, but with the 1.8A of consumption, I suppose it must be in 30-40 w. All help will be welcome. Thanks in advance

Thanks for answering, Jorgeal. This is a well-known Chinese kit, it is on many internet sales platforms (Amazon, Aliexpress, Ebay ...). It is, specifically, a broadband amplifier not tuned from 70 to 170 mhz with this mosfet, which works perfectly in vhf. The instruments that I have, is very basic, enough to check consumption and relative power (phantom load with output to measure cc, roe meter, tester). You are right that I possibly brushed the mosfet, for overexciting it, since the exciter is a transmitter with adjustable power of 1w and 7w. The problem is that this transmitter has the nomenclature of the output, wrong; that is, the L, which should be LOW, low power 1w in this case, corresponds to the high power output 7w, and conversely, H, higt, corresponds to 1w. I have already ordered two more transistors online. I will tell how the subject ends. Thanks again