Let's MOD a NE5532 3 band tone control for better bass..new ICs , real '90's operational circuits makes a huge difference..use your headphones for better listening.. ... https://www.youtube.com/watch?v=HYfy_l12JIY
ELAF 201-3 Soviet Era Streo Reel to Reel tape recorder, made in 1986 by Vilnius ELFA Elektrotechnical Works in Lithuania. The machine still looking good and working great. New set of belts are coming. Stay tuned for the next episode.
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https://www.youtube.com/watch?v=u_oS5lvz_MA
Today I installed a power meter. PZEM015 with 50A shunt let me know how much energy my DIY battery for solar energy can 'eat' !
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https://www.youtube.com/watch?v=GoAmsAvLEVA
Fixing a small stage monitor with a 10' RCF loudspeaker, after an accidental fall! Luckily the electronics and the loudspeaker are stil alive, the cabinet needs glue and attention! But it's back to work...
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https://www.youtube.com/watch?v=Q2VPJbR0F7I
Let's see what a LoRa Helium 868MHz saw filter is looking on a Spectrum Analyzer and understand why a filter is necessary.
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https://www.youtube.com/watch?v=N4V3Ewfz7xo
TC-HELICON Voicelive PLAY GTX experiment about using MIDI controller to alter pitch of a Robot style voice effect.
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https://www.youtube.com/watch?v=R0vDwJryQrw
With few parts and a SPF5189Z chip let's build a saw filtered 868MHz LNA for LORA and Helium miners. Schematic here : http://viocaia.amphia.ro/RFamplifier.pdf
Saw RF filter : https://www.mouser.com/datasheet/2/842/tdkc_s_a0001073232_1-2295337.pdf
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https://www.youtube.com/watch?v=fH9Drl-Vsyw
After testing a 1600X , now it comes a new 50-500X magnification USB digital microscope. Very useful but needs a better stand and proper place on the bench. So far it's worth the money!
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https://www.youtube.com/watch?v=CHKsSbQfKvY