Published at Monday, March 25th, 2019 - 14:24:29 PM. wiring. By Leona Coste.
He loves a rich, woody tone with nice overtones, so a certain cap from Roederstein is his standard. But he also wanted a warm, woolly tone as well as a slightly mid-scooped one, so we installed a rotary switch with his beloved Roederstein cap for the standard sound, a NOS paper-in-oil cap for the warm tone, and a standard “orange drop” cap for a slightly scooped sound. All three caps were 0.033 µF. The original Varitone design. The original Gibson Varitone design used an inductor to create a series of notch filters together with the capacitors. Personally, I think adding the inductor is not the best choice. The design may have worked in the ’50s, but today most of us are looking for different tones. (Joe described the tone of the original design in his article.)
One other way to wire multiple zones is with the use of zone valves. A zone valve is a motorized solenoid valve with an end switch. The thermostat for each zone is wired through a 24-V transformer to the zone valve. A mechanical end switch is wired to the thermostat terminals of the boiler operating controls. When choosing a transformer for zone valves, make sure that the VA (volt amps) rating of the transformer is sufficient to run the zone valves attached to it.
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