Switch Bluetooth with Pickup Selector on Tube Radio. Really NO noise.

A comment on one of my recent videos called my attention to the probability that having a bluetooth module permanently switched on inside a tube radio was probably not a great idea. As it's only required when we select the pickup input, there is not good reason for letting it pollute the airwaves while we're listening to radio, right? Along comes the idea (from Rodney) to drive a relay from the magic eye's high voltage supply, which would provide power to the BT module only when said eye was off, i.e. when NO radio was being listened to, i.e. when the pickup selector was activated, i.e. when we wanted to listen to the bluetooth audio. You get the idea. Enjoy and stay safe. https://drive.google.com/open?id=1lJ5... You can now support the channel:   / mcaldeira   https://paypal.me/macaldeira #tuberadios #antiqueradio #radiorestoration _____________________________________________________________ DIY TEST GEAR: The title says it all:    • Zener Diode Tester - Part 1. The build.   RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:    • How to safely check the Power Transformer ...   HowTo's: Various videos on some simple techniques and projects:    • Extend tube radio FM band above 100MHz wit...   See also playlists on some other completed restoration projects. PHILIPS BX750A:    • Philips BX750A tube radio restoration - Pa...   TELEFUNKEN OPUS 2114:    • Telefunken Opus 2114 stereo tube radio res...   SABA UW-175-Z 3D:    • Saba UW 175-Z 3D tube radio restoration - ...   GRUNDIG 1070:    • Grundig 1070 tube radio restoration - Part...   SCHAUB-LORENZ GOLDY 58 type 3020:    • Schaub-Lorenz Goldy 58 type 3020 tube radi...   BUSH VHF64:    • Bush VHF64 tube radio restoration - Part 1...   GRUNDIG 3060A:    • Grundig 3060a tube radio restoration - Par...   TELEFUNKEN OPERETTE 8:    • Telefunken Operette 8 tube radio restorati...   GRAETZ SUPER 171W:    • Graetz Super 171W tube radio restoration -...   LOEWE-OPTA MAGNET 3737W:    • Loewe-Opta Magnet 3737W tube radio restora...   BRAUN ATELIER 3:    • Braun Atelier 3   LOEWE-OPTA TRUXA STEREO 4741W:    • Loewe-Opta Truxa Stereo 4741W   GRAETZ COMEDIA 616:    • Graetz Comedia 616 tube radio restoration ...   SABA FREIBURG W2:    • Saba Freiburg W2 (WII) restoration   GRAETZ MUSICA 4R417:    • Graetz Musica 4R417 restoration   You may also be interested in ... CAPACITOR LEAKAGE TESTER:    • Capacitor leakage tester design & build DI...