Audio Resistor Testing with Bode 100 with Omicron Lab #OmicronLab #Bode100 #Audioresistor

In this video 'Audio Resistor Testing with Bode 100 with Omicron Lab ' I will show the Load Resistor testing using the Omicron Lab Bode 100. #OmicronLab #Bode100

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[billdomitilli]

My first job in Electronics [1967] was testing precision resistors. Precision wire-wound non-inductive resistors were wound half way in one direction, half way in the other, with a wire that had an intrinsically low temperature coefficient. The trend was toward 1% metal film resistors in arrays with cancelling temperature coefficients to remain extremely stable over temperature. We used a tertiary standard Kelvin Bridge, with beakers of oil at room and elevated temperature in which to immerse each resistor to calculate its TC. we noted each one's absolute value and TC, and added them together with canceling TCs to achieve the final "perfect' resistor, or voltage divider. The Stanford Linear Accelerator project bought a lot of our stuff. Cheers, --bd

[artemtify]

Being your subscriber for 1 year and already learned a lot from your videos

[versace]

HI Eddie, I really like how you are doing these testing Videos. These videos are amazing. Thank you. 😄👍

[jakubczajka]

I really like your latest videos with Omicron and QA403.

[garthhowe]

I only use hand wound cables made by blue eyed, blonde virgins. I can't stand when music rolls off above 100khz. 😂

[Aletsch]

Curiously enough in getting my new workbench setup sorted for dialling amplifiers in, I recently tested some giant aluminum clad motor braking resistors on my Dayton Audio DATS V3 ..Amazingly they came in almost smack on the 8 Ohms specified, and despite being designed for general purpose industrial use, they exhibit *zero* inductance, which was a welcome bonus. So yes, whilst cheap for power resistors, I see no down sides to using them sofar :)

[johnshaw]

Not relying on resistance and using impedances is what made NAD 3020 such good real-world amplifiers in the early 80s and revolutionised amp topologies towards current delivery into low impedances.

[kbdxn]

Air core wire wound resistor will have a magnetic field generated which will have an affect in testing an amplifier.

[georgedavall]

Eddie You da man!!!  😊

I used to be a self proclaimed ‘Audiophile, ’ and I could tell the difference in fractions of Hertz, between cables! You believe that, right? 🙄😂 Please do a Speaker cable Video.
I had friends that claimed they could tell this and that, I dont know? I never cheapened out on my connections, but the ‘Source’ was always the most important aspect of a High Fidelity Sound System.
I ran a higher end Kenwood DC Integrated Amplifier, and a Dual turntable, with Shure cartridge, tracking at a little over a gram and a 1/4 or so. Used a Discwasher and Zerostat system on the records. Aww, I miss those days.

[gregreynolds]

Love these videos. Have you considered seeing a therapist about your audiophile issues? 🤣

[joepalovick]

Thanks Eddie! Can you do the same testing with a device like the QA403 that may be more attainable for most of us?

[yankeebotanist]

@kiss analog, new to electrical work and have an oscilloscope (analogue) but need a bench power suply, any you wouldn't recomened on the less expensive side (150 bucks at most unless any lower is unsafe).

[jedi-mic]

What do you think of grounding boxes quite common in hifi.? Where you would have a capacitor resistor and an inductive possibly fed to ground Earth. Give us the statistics on the graph if its beneficial.

[Roosville]

I did some work looking at a 220K carbon composite resistors in a valve ampllifier, where voltage swings can be 300V. Firstly noisy as hell, it was all over the place. It also has a non-linear element where the resistance drops with applied voltage, mostly over 160V so it compresses the amplification a tad. The third question was how fast did it do this? I didn't go further, but with a 1KHz sine, the exacts same voltage compression was present as with a DC test.

[JeyDeeSweden]

Interesting measurements, but it is obvious that you are not by far a real audio guy. But a measurment guy.

Constructive criticism: Your sound setup is obviously really bad. Thin, cold, hollow, canny and harch, with an unnatural boosted, sissling treble.

Accoustic treatment in the room and better mic setup could be a start to get a way better and warmer sound.

And a better reference sound playback equipment and setup so that you _too_ can actually hear that the sound right now is actually really, really bad. Good luck.✋🙂