I have issues with primary voltage, the above meter is shown with the amplifier keyed. I tried using an extension cord from another outlet but there was a voltage drop across the cord. I tried taking a toaster oven and did find outlets with better voltage but moving the amp and the coax was too difficult. Thus I am selling it because I traded a 6400M for a 600 watt solid stare amplifier where low primary voltage is less of a factor as its power supply doesn't care, saving me the expense of an electrician. I get 700 watts out as it is from the Dentron. it is rated at 1000 watts input. Using 572B tubes. I have no reason to believe the amplifiers won't put out rated power with a sturdy primary voltage. But I do not guarantee it. The AC cord on the Dentron has the outer covering partially broken where it enters the amplifier. No bare wires but it should be looked at. The 572B tubes on the Dentron are worth a quarter of the amplifier selling price of the amplifier. Price $600 plus a lot for shipping. Contact me at my QRZ address, don't post, "email" sent, hams have a habit of sending an email, I respond and I never hear from them again. I respect people I answer all emails.