Whats a ghost note1/8/2023 This is the last filter, which filters the supply for the preamp. Install a luf 600-1000V non-polar plastic capacitor across the last decoupling electrolytic in the line. With Marshalls there are two ways to help cancel this out: Increasing the filtering can cure the ghost note problem. The same is true with many amplifiers designed in the 1950s. Vintage amplifiers like Vox AC30s have very low filtering, I believe this was not because of design, but more as an economical approach to save money. Others generally are just suffering from old, or leaky filters. Some amplifiers like Fender Black/Silverface models that have the ghost note issue can be reduced by cutting the phase inverter “output” coupling capacitor values in half. This is because they do not have any flat sides for the signal to bounce off of. ![]() Pure copper leads reduce this, and tubular capacitors are less prone. Other capacitors for coupling have ESR problems, sometimes caused by the physical construction, and lead type. ![]() Many amplifiers are prone to “ghost notes.” It helps to know what kind of amp we’re talking about.Ĭertain capacitor brands, like F+T, LCR have high leakage current.
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