FYI All, The HP4815A Vector Impedance Meter submersed the main tuning capacitor in an oil bath of some kind to get the capacitance up. Apparently dissipation factor was not of concern when the unit w
I need to open mine up and replace one of the capacitors because the oscillator will not start on the higher frequency ranges. I am gun shy at this point until I know exactly what I am dealing with.
Great information, Rick! (Of course we still don't know about dissipation and heating at high power - unlike the situation in the 4815A. Of course guys running power could employ a thermal probe init
I did a Google search about 8 months ago, and I found what seemed to be an ideal liquid to use for this purpose. I forget what it was, but it had a low dissipation factor at HF and a good dielectric