Buying an Oscilloscope and Accessories For Audio Bench Work and Testing
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- Опубліковано 30 чер 2024
- BG295 - Part 1 in our new 5 part series on using Oscilloscopes for Audio Bench Work. This is a practical usage focused series for the average DIY'er that wants to get into doing some audio bench work, restoration, and repair of vintage or new gear. We also cover analog vs. digital scopes and why you might want one over the other for audio work. We cover many accessories that would make doing audio work with an oscilloscope both practical and safe.
The following Episodes will follow in coming weeks:
Part 2 - Oscilloscope Safety Basics & Working With Probes
Part 3 - Basic Oscilloscope Usage
Part 4 - Real Life Use Cases On The Bench
Part 5 - Advanced - Analyzing Audio Signals Using An O-Scope (Distortion, Frequency Response, Power Output, etc.)
Links mentioned in the video:
EEVblog #601 - Why Digital Oscilloscopes Appear Noisy
• EEVblog #601 - Why Dig...
RCA (Mono) to 3.5mm (Stereo) Adapter
www.amazon.com/Monoprice-1072...
Parts Express 8 Ohm 100W Non-Inductive Dummy Load Resistor (Need 2)
www.amazon.com/Parts-Express-...
Jameco GRP-1200 Isolation Transformer
www.amazon.com/Valuepro-GRP-1...
RCA Female to BNC Male
www.amazon.com/RuiLing-Female...
Syncwire RCA Cable, [10FT/3M] Nylon Braided 3.5mm to 2-Male RCA
www.amazon.com/Syncwire-Shiel...
Universal 100mhz Oscilloscope Probe Kit
www.amazon.com/Universal-Osci... - Наука та технологія
I was recently gifted a Tektronix 2235 and just finished this first video and wanted to say thank you so much for a easy to understand approach. I actually take notes in a graph composition notebook. I'm 53 and wish I started sooner but I am doing it now. Thanks again.
Better late than never!
Merry Christmas Mark, great start. Looking forward to the series. Thank you, happy new year to you. Be safe
Love it!!! Thanks so much for putting this series together. Been wanting to go beyond the basic obvious repairs. An oscilloscope is something I've always wondered about, so thanks again for this series and I'm really looking forward to seeing the rest of them.
I can't thank you enough for this video! I can't wait for the rest of them!!!
Awesome Part 1. Can’t wait for the rest of them!
This is fantastic! Looking forward to the next 4 episodes.
Very glad to see you do this series! TY!
OUTSTANDING video! I appreciate all your effort to put this together!
Thanks Mark - Great to see you up and running with the Scope series - good introduction - Tick box checked .
All the best to you and your family over the festive ( be it subdued) season, stay safe .
Best of the Holiday wishes to you and yours! Very excited that the O-scope series has started (especially looking forward to the safety part).
This is a great start for a series of usage with oscilloscopes. Loving it so far!
I will definitely be tuning in to this 5 part series. Thanks in advance for doing these in depth videos.
Great value video series Mark. I already learned so much from you and have turned it into practical use. Looking forward to the next video’s.
Very excited for this series. Been watching your videos for a while now and you are great at explaining what you are showing. Thank you for the time you put into everything you provide us hobbyist with. Happy New Year
Just what I was looking for straight forward info on what's needed. Thanks looking forward to the next video.
I'm already looking out for the follow-up videos.
Nice work. I wish you and your family a peaceful New Year and a healthy 2021
Thanks so much for doing this series! Your channel has given me the tools I need to get into building my own tube amp :)
This is a very helpful video series, I was searching for something like this long time up to now, I respect your work and your time to make this educational video. Thank you!
Excellent as usual, great delivery, very straight forward and easy to absorb and understand... Looking forward to the remaining videos....
Perfect Part1 Explanation! Looking Forward To The Next Four Episodes!
Thanks so much for taking the time to do this series. Extremely helpful for the likes of myself who hasn't used a scope in more than 60 years.
Best wishes to you and your family for a healthy, happy, and prosperous new year.
Can't thank you enough for this video and the accompanying series! Saved me tons already, as I am just starting out with this hobby! SUBSCRIBED!
Thanks! Excellent overview of connector basics and oscilloscope basic and setup up for scope operation. Much appreciated!
Mark - looking forward to the rest of the series. This will help reinforce what I already know - really appreciate it !!! Ron
Thank you for your time, knowledge and sharing your valuable experience. Very comprehensive thus far.
Thank you. I watched episode two before one and asked whether analog or digital and was told to watch episode one. Glad I did. Great explanation. I am definitely looking forward to the rest of the series.
Great start to an exciting series
Thanks for doing this, Mark. Happy New Year.
Started research on testing amplifiers with o'scopes and found this, awesome video series. Thanks!
I learned SOO much from your videos and I play them over and over again to let it sink in. Thank you very much 😀
Wow! What an incredible series of videos. Was absolutely critical in helping me trouble shoot my preamp restoration safetly!
Thanks for this. 1st episode was very informative and well paced. I look forward to viewing Parts 2 through 5.
Thank you so much for this video series! This is the info I have been looking for.
Simply the best presentation on the How, What and Why of an Oscilloscope and accessories for the audio bench. Straightforward, practical and understandable. Mark you're the best! Thanks for sharing your expertise and time. I am getting back into vintage electronics and have discovered your videos as my main source of education. Thank you. Thank you. Thank you!
My man. I just love your channel so much. It's packed with such useful, practical and well presented material. I'm fairly confident that you're content has put a lot of bread on the table for mini folks and I hope you're being well supported by them.
Thank you! I've learned so much from your videos. You make electronics so much clearer for this old knuckle dragging retired Soldier.
Excellent tutorial. Answered a lot of my questions. Links very helpful.
Thanks
Great series! Thank you for your hard work!!!!
Great recap. Thank you for posting this.
Great series. Really informative and motivational! Keep them coming. Fan from Chicago.
Probably the best YT video I've seen on any subject matter. I can't wait for the rest of the series...thank you.
Perfect, it's the last bit i have to aquire to begin the real work on the audio signal. I've been playing too long with swapping parts now it's time to really see what they're doing in the circuit. Thank !
One hour videos plus would be great with precise details photos and part numbers is exactly what we need.
Thanks for the video, looking forward to the rest!!
Great video. Straight to the point and easy
Grate video Mark looking forward to the next one
I haven't finished watching yet but this is GREAT info. Thanks so much for taking the time to put this presentation together!
great video I have been thinking about starting to learn how to fix my vintage gear for awhile now . Thanks for the info to make my mind up and start gathering the things I need Great video and thank you very much
Excellent excellent excellent. Very informative and practical. Just was a person trying to learn about electronics needs. Thank you.
Thanks so much for this series !!!
I already own an several oscilloscopes but I enjoyed the video and plan on following along so I can pick up new info as you progress through the lessons.
Great video and good advice. Be sure to also get 50 ohm BNC terminators for your scope inputs to assure that you'll see correct voltage readings from your signal/function generator.
Thank you, thank you, thank you!
Happy New Year!
Tom
Thank you for educating me on functions on oscilloscopes
Thanx! Exactly what I’ll need when I get around to buying a scope!
In ancient times when I worked at Tektronix, I used a 464 analog scope (I think that was the model). I learned to use it very well and loved it. A couple of years ago, I purchased (used) a Tek TDS420A digital scope with CRT display. Someday I might get it figured out. Like you, I grew up on the analog scopes and am struggling to get up to speed on all the menus, functions, etc., that my digital scope had. I just need to live long enough!
I can tell that you have many years of experience and knowledge of electronics as you explain things so well. Even though I use an o'scope and sig gen for radio tinkering, I do use audio frequencies when aligning radios. So, your video is very helpful to anyone contemplating purchase and use of an o'scope and a signal generator. Thank you very much.
Very practical information. Thanks!
Soooo good. Thank you for sharing this!
Love this series. Thank you. Concerning the channel selection buttons on that Rigol, that's why I won't buy a Rigol and will be buying a Hantek DSO2D15 which has individual controls for each channel and an internal arbitrary waveform generator. It will be an addition to my Tek 465 scope and if I ever get around to repairing them, my two HP 1741A scopes.
Hi, many thanks for info, looking forward to next video.
Great video for beginners like myself. Tube stuff isn't my bag. This video is very informative and educational. Thanks for sharing your thoughts.😁
I'll sure be following this series.
I was given 2 scopes some time ago but not even looked at them, don't even know if they work.
Gonna dig them out soon and get my self familiar with them.
Been in electronics for 50 years and just learned that I can still learn new things. I have the same isolation xfrmr and never thought to plug in a power strip. I am going to do this and paint it red and next to it the other will be it's natural silver. Great tip.
Excellent video. Thanks!
Happy New Year! 🎇🎆💥
Stay safe. 😷
Excellent!
excellent tutorial and clearly explained for starters
Thank you for this amazing video!!! THANK YOU
Very helpful and useful information. Thank you!
Brilliant Work...!
thanks a lot for this serie of videos
Great video! Great channel! Thank you!
Those non-inductive wirewound resistors typically have the wire wound in both directions, which results in a relatively low inductance. Not zero, but close. Unless you're taking really low distortion measurements, it's probably not critical to have it be ultra-low inductance. After all, a speaker is somewhat inductive. It is definitely worth getting four resistors though, because you want to be able to test into 4 ohm loads.
Good start, thanks.
Another great video, thanks so much.
Thank you, I’ve been looking for this.
Great video Mark!!! It may also be worth mentioning to the audience, that Variacs (Autotransformers) are not isolation transformers. Many people think they can double as such. Also, an isolation transformer, although electrically isolated from the line and neutral, is not necessarily isolated from ground. If you are going to use a 1:1 transformer for ground isolation make sure you check that the line side and load side grounds are not the same point electrically. For some, this can be fixed by a simple removal of a ground strap connection or snipping the ground prong on the line-side plug. I have a Tenma 72-1095 Isolation Transformer with adjustable voltage and it has a common ground. The load side plugs are connected to ground via a ground wire to the chassis. Disconnecting this wire isolates the load side. Just something to think about. Thanks!!!
Perfect Timing. I am looking to purchase an Oscilloscope for various Guitar amplifier and pedal builds. Looking forward to watching the series....Thank you.
Very helpful series. I really appreciate you doing these videos. I have an SX 1980 that I want to test out and put an upgraded power supply in and I don't know anyone close to me qualified to do it, so learning how to use a scope will certainly help. All the best and have a great New Year.
Actually, a scope will not help that much. Just checking distortion, for instance: A scope will display the waveform. Alas, even a trained human eye cannot detect more than about 1% THD. A '70s or '80s high fidelity amp needs calibrated, lab grade equipment to check THD. One problem is testing something like your SX-1980 is that your signal generator has a higher residual THD than an SX-1980 has at full power (less than .01%).
Thank you. Just what I needed
Excellent video, thank you.
Good introduction. I too am an analog scope guy. Used 10MHz Philips scopes in college (up in Canada). One of the most overlooked scopes on the market is a Tektronix 2236/2236A. It should be cheaper than your 2246. However, it has a pretty interesting built in frequency counter, and time measurement functionality and multimeter that can be slaved to channel A. I think the frequency counter is 8 digits, and it it a 4-5 digit multimeter, and there are separate inputs for the multimeter if you want to do voltage, resistance, and continuity tests. I think it can also do external frequency tests, but its been a while, so I'm not sure about that. The scope will put meaurement lines on the screen when the multimeter (for measuring Vp-p or Vrms) or frequency/time (just like the 2246 does). Neat part is that the multimeter/frequency counter is slaved to the oscilloscope channel, so the readouts are based on the vertical and horizontal settings on the scope, so no need to do math, or count graduations and then multiply. As far as I know, the frequency/time functions work to the entire bandwidth of the scope (100MHz), as does the multimeter, and I'm pretty sure that the Vrms is True RMS, even to 100Mhz.
I bought (leased actually) 25 of these Tektronix 2236s for the computer factory that I used to work at. We were constantly buying Fluke meters, and they would constantly disappear. Because I was working as a test technologist at the time, my boss asked me to find a solution to the "multimeter growing legs and walking away" problem. I looked a locking the meters up, tried it, and they still disappeared. I tried to get people to sign them in and out, and they still disappeared. So, I tooke the remaining multimeters off the production floor, and changed all the scopes out for Tektronix 2236s. No more missing multimeters, and the techs all found the scope's ability to do time/frequency measeurement a great benefit. Reliable, solid, and typical good Tektronix quality at the time (late 1980s to early 1990s). The HP 172X and 174X scopes were great too, as were some of the Philips (anything without the LCDs and non-digital) and Kikusui scopes (COS series). Never used the Hitachi scopes.
And by the way, the Tektronix 2465 series, while ridiculously overpriced these days, is probably the greatest portable oscilloscope ever made. I had one on my bench for over 5 years, and it was a joy to use, and a real advance on the previous scopes that went before it.
Great stuff! Can't wait to get to the later ep's to apply this with my own hobby DSO work. (Y)
This is going to be a Good few videos ! Yes please !
Wow bud.. really appreciate you making these.. thumbs up for sure..
Perfect timing... already have much of this equipment, but just learning to use it with audio equipment.
Is your dog part Chihuahua?
Best way to learn electronics is in college. DC, AC, Electronics 101 to 103.
No time for college? Then learn:
Ohms Law, kirchhoff Voltage and Law, Thevenin's Theorem
Albert Malvino "Electronic Principles" is a really good book. Hook up the example circuits in each chapter and test them with your equipment. You will soon be designing your own audio amplifiers using discrete components.
@@JohnDoe-bf1fw Actually, I have a 3 yr College degree in Electronics... but didn't work at the component level for long, and don't recall doing much related to AC, other than motors and such. My dog was a Welsh Corgi.
Very good video, sir. I've ended up with several 'scopes ranging from a late 40s lab model through a dual channel Heathkit c.1970 up to a 100 MHz Techtronics. For audio use on my radios I use the Techtronics or another 10 MHz scope (tube equipment) or one of the cheap DSO138 or DSO150 units from eBay/AliExpress/Bangood for solid state equipment (these are roughly $24 - $30). I have used the DSOs fed through a capacitor for some boat anchors. I plan on closely following the remainder of this series. Thanks.
Great intro series for new learners and old dogs too. Those old 10 to 20 Mhz scope will serve one well, I saw 100 Mhz scopes for as little as $50 dollars a afew days ago on the web.
Great job! I love this
I want to get into amp repair, pedal repair, modding, building, etc. This video seems very helpful, thank you! 👍
Really good,very interesting ,thankyou
I have and use the exact same isolation transformer you have, and use a power strip out from there for everything, including the variac and sometimes a DBT. I just got one heck of a deal on a brand new Tektronix TBS1104 Digital Oscilloscope: 100MHz, 4 Channels, 1GS/s sample for a mere $600. They sell for over $1900 on most places like Mouser. Santa was good to me. lol! The 4 channel is great when servicing quad amps and receivers. The old analog BK 2120 20MHz scope serves the purpose quite well and will not be "retired" any time soon and will be used on a 2nd bench. The Lab-Volt 1236 AF/RF generator works quite well for audio too. Awesome videos Brother!
Thanks Mark!
Thank you for a great video 😊
I had to subscribe again ! I learned all the hertz stuff in the Radio Shack books "AC circuits part one and two". Killer books
Thanks, great video… helpful for a newbie.
Thank you very much, for taking your time. :-)
Thank you!
thank you for sharing
Looking forward to the rest of your series. Started my tech bench about 2 years ago and went through this entire process without as much guidance. The one area that stopped me cold for a bit was the stupid and mislabeled isolation transformers on the market. Very few are actually isolated. I am not referencing a Variac. They almost all tie the ground blade to the round ground plug that you are expecting to isolate from. I had to learn how to modify a new one by changing out the type of plugs on one bank (there is a special type of isolated outlet plugs you can buy) and removing the round pin ground connection that was originally connected. Everyone that checks their isolation on almost all of these newer ones will be surprised to find they have continuity to the any other wall outlet ground pin. They apparently can call it isolated still because it uses a transformer. It doesn’t have anything to do with ground isolation anymore. Your older isolation model or use of 2 prong adapters is the easiest method to go by.
Agreed. Isolation transformers are sold with safety in mind. The problem, as you stated, is that many iso transformers are not true isolation transformers. You *cannot* blindly trust your life - or test equipment - to an iso transformer. There are a lot of gotcha's involved. You *must* test the thing. Corollary - You must know how to test it.