• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

KT88 SET internal wiring layout

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6A3sUMMER

Member
Joined 2016
A good order of wiring is:

Hot; Fuse; Switch; Primary; Primary; Neutral

I use 2 Fuses in series.
Example: 2 Amp Fast Blow, in series with 1 Amp Slow Blow

The amperage of the Fast Blow is determined based on the Inrush current at cold turn on, and also the inrush current with the amp hot, and switched off and on (Hot start). Flickering power can cause a Hot start inrush.

The amperage of the Slow Blow is determined based on the steady running current of the warmed up amplifier.
 
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M

mitosis

Member
Joined 2018
Does anybody have any objections to the positioning of this 220k ohm resistor (the one below the capacitor)? It's just mounted to the bottom of those lugs because it fits down there nicely. Any issue with using those holes, or should I try to stay on top? Thanks!

IMG_3507.jpg
 
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