I am working on a 1kW SW transmitter (AM). When its modulated, the power goes DOWN. Not UP.



I am not sure why it would do that. It even says in a manual it will go down. HUH???? What am I missing??
Deep Thought wrote:100% negative carrier shift?![]()
How much does it go down? What kind of modulation does it use? For an example, the modulator in a Potomac Instruments synthesizer does it's thing by reducing the power output at the audio rate...if you want symmetrical modulation you would have to cut the 'carrier' to 50% and modify the bias on the modulated section. Not worth it considering how it works.
Sounds like your transmitter is doing the same thing. PEP=carrier!
K4WRF wrote:Is the transmitter primarily intended as an ssb device that will produce AM? You may find this is common for older multipurpose com transmitters of that ilk and purpose. Is modulation envelope generated in exciter then amplified? So many questions!
K4WRF