Sorry, I meant parallel with respect to the PI plates and the grid resistors... I think.novosibir wrote:The PPIMV usually is added in parallel to the stock bias feed resistors.
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Moderator: VelvetGeorge
Sorry, I meant parallel with respect to the PI plates and the grid resistors... I think.novosibir wrote:The PPIMV usually is added in parallel to the stock bias feed resistors.
Shure, that would work, but it would sound worse than the in this thread described solution and still worse, the more you'd crank the pot down.Eoin wrote:Would it not still work if the coupling caps were still connected to the pairs of 1k5/5k6 grid resistors as per normal - and a split from the coupling caps was connected to the wipers of the dual pot while one side of th pot was connected to the point between the two bias resistors?
No its not sensitive, other wires are sensitive to it. All the wires carrying the AC audio signal. Any wire to and from a volume and tone pot, and the wires to the grids of the all tubes. You may actually be safer were the jack is on the back.MacGaden wrote:If you wanted to put the PPIV master where the prescence was, and move prescence to one of the speaker jacks, what about lead dress ?
Is´nt the wire to the prescence pot one of the more sensitive ones to pick up noise and cause squeals and hum ?
TIA
YES!Anonymous wrote:As you turn down the master aren't you shorting out the 220K resistors??
NO!Anonymous wrote:Wouldn't that mess with the bias??
No need for that additional high-pass-filter, it doesn't make your sound betterAnonymous wrote:How about putting another set of coupling caps on the wipers?