Using power switch on an amp module to switch on a second module -Bluetooth Rcvr

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Harvey Riddle
April 6, 2026 at 7:15 pm

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#131374 Reply |

I am repurposing a 1940’s AM Receiver and Phonograph, using the original cabinet and a new turntable. I have no use for the AM receiver though, plus it expects a crystal cartridge signal and my new turntable has line level outputs. But I want to keep the receiver in place for aesthetic purposes. It has a 2-pole 4-position selector switch that I can use to select between the phono and the bluetooth sources. I can install the Drok amp in place of the Volume/Power switch location in the original chassis, and would like the bluetooth to get powered up when I turn on the amp. I would think there would be some point on the amp circuit board where I could tap off a switched power source. I will just need a small wattage amp to drive a single 5-inch speaker, so the 5W + 5W module should work.

Any suggestions on how to do this with the Drok amp and one of their bluetooth modules?

Raquel
May 18, 2026 at 1:50 pm

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#132339 Reply |

When tapping into a switched power source on a Drok amp, you’ll usually want to probe the output side of the potentiometer’s integrated switch or the main power rail after the filter capacitor to ensure your Bluetooth module receives clean power simultaneously. While my own projects usually lean more toward the digital side of media distribution, I’ve found that the technical breakdowns from a custom live streaming software development company have been a very stable way to understand how hardware and software interfaces need to stay synchronized. It’s a bit of a different scale, but the principles of maintaining a clean signal path from the source to the output remain the same.
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