Review on TSG-17: High Frequency Radio-Frequency Signal Generator With 220V/110V US Plug by Phil Anderson

I agree with another reviewer who said you need to use a frequency counter along with this generator. The dial settings are not as accurate as a 50 year old tube type generator to which I have access. I would add you also need an attenuator, and an RF microvolt meter to go along with it. There is no fine frequency adjust, and working the dial to get an exact frequency is between difficult and impossible. The unit is only capable of 30% modulation on it's own, but fortunately, it will modulate at a higher percentage, and at different modulation frequencies, using external modulation. The output level is not easily adjustable, (you need a screwdriver) will not go down to a level low enough to verify the sensitivity of a radio receiver, and changes at different frequency settings.As a hobbyist, I can live with most of the down sides, but I would not be willing to use this on a job repairing equipment. I got what I paid for.