jcny wrote:
So this allows remote switching for both the boost and the el84's / 6v6's on an SIIIv6?
Yes
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..this remote switch replaces both toggle switches on the back panel?
Yes
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The 6.3V power supply that is shown that has to be built is connected to the two green power transformer leeds to the tag strip that feeds the tube heaters?
Yes, it ends up at 8.5VDC or so.
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The boost board is connected to both ends of the 2K7 (R9) resistor that the boost switch is presently connected to? I.e., the board replaces the R34 - C21 combination?
Yes.
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For the cathode relay board, if pin 6 of the relay connects to the R20 - C10 post on the board, and pin 8 connects to the R33 - C20 post on the board, doesn't pin 11 of the relay have to connect to pin 3 of the el84 tube socket and pin 9 of the relay have to connect to pin 8 of the 6v6 tube socket?
This design switches the single ground connections of the cathode pair so just one lead for each pair is switched to ground.
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Will a standard (Fender style) replacement amp foot switch and cable work for this?
If you are doing both switches, you need a 'stereo' cable with a two foot switch pedal. Otherwise 1 footswitch for the boost only. Any footswitch will work.
I think switching both cathodes & boost is a bit over the top. If I was doing one, it would be the Boost only.