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Sewer line camera by Sanyipace is useful for general purpose inspection
Discount code: JAT10 ($10 off) Product link: https://sanyipace.com/collections/5mm-sewer-coil/products/5-inch-screen-sewer-camera-with-meter-marker-multi-color-options-s5517dc-pre-sale?utm_source=YouTube&utm_medium=JohnAudioTech&utm_campaign=Rosie
Open this video on JohnAudioTechDC to DC voltage converter test & review
These handy DC voltage converters convert 12 volts to a higher voltage or convert a higher voltage down to 12v but may be available for other voltages as well. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechPushing the UTC TDA2050L to the limits = unhappiness
I bought more UTC branded TDA2050L audio amplifier ICs to see how they will work. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechSuper barrier rectifier diode test
Checking out these super barrier rectifiers to see what they are all about. Testing the forward voltage drop and reverse leakage current. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechAiyima S4000 powered speaker review
Review of the new budget powered speaker from Aiyima. Included some audio analyzer measurements. Price as low as $160. https://de.aliexpress.com/item/1005011667078395.html?gatewayAdapt=glo2deu https://www.amazon.com/promocode/A1CHXSKP4MPZVM Patreon https://...
Open this video on JohnAudioTechRadio Shack STA-450 receiver on the analyzer
Minor repairs and test on the audio analyzer of this budget 1980's stereo receiver by Radio Shack. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechuPC1238 audio amplifier IC tested on the analyzer
NEC uPC1238 5 pin TO-220 audio power amplifier was introduced around 1980 to be used in compact stereos and higher quality TV sets. I'm interested in the history of these chips and what products they were used in. If you know of products this IC was used in...
Open this video on JohnAudioTechRadio Shack MPA 46 35 watt PA amplifier on the analyzer
Test out this amplifier on the analizer plus a peek inside. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechMOSFET substitution in linear audio amplifiers
Some tips on selecting a MOSFET output transistor for a linear amplifier. Repairing the Rockford Fosgate Punch P400-2 amplifier. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechExperimenting with amplifier bias setting
Setting the output stage bias to zero and increasing until distortion is no longer audible. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechA simple fix gives these speakers up to 5dB more bass!
A silly design decision attenuates the bass output from the Aiyima P600 speakers. Let's fix that. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTechTrying random output transistors in an amplifier to see what happens
Removing the complementary output transistor from an amplifier and substituting in random transistors to see what occurs. Patreon https://www.patreon.com/user?u=12254451 Email: johnaudiotech@gmail.com Thank You!
Open this video on JohnAudioTech