Oscilloscope Basics, Part 2: Seconds/Division and Triggering
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- เผยแพร่เมื่อ 13 มิ.ย. 2018
- In this Part 2 of the Oscilloscope Basics video series, we will cover Channel 2 Invert, Add, and the Seconds/Division adjustment, with emphasis on calculation of frequency based on the number of waveforms on the screen and the time allotted for each horizontal division. Finally a brief overview of the purpose of Triggering and how to switch it on and off.
If you enjoy videos like this, please subscribe to our channel and consider becoming a Patreon patron by visiting this link: / uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks !! - เพลง
NOTE: There is an error at 20:26 I meant to say "Ten Thousand" not a hundred thousand.
Did you teach at high schools?
I tried it, but found the majority of students to be unprepared, undisciplined, and unwilling to learn what I was presenting. So I shifted to Middle School and found the students to be far more cooperative and responsive.
Great teaching. And thank you for allowing us to go out and play for recess (while we watch Jack)
Thanks, Graham. We all need a break once in a while :)
I'd appreciate it if you re-wrote every technical manual ever printed. Your explanations are absolutely perfect and extremely easy to comprehend. Screw Netflix and Hulu, this is my favorite streaming channel.
Wow.....thanks so much, Paul. I agree that most tech manuals are generally counterproductive, inducing far more confusion than understanding.
I know this video has been up for a while, but I just bought my first scope. Thanks to your tremendous teaching abilities, I now understand it's usefulness and how to operate it correctly. Thank you, Uncle Doug!
You're welcome, Buddy :)
This content should be put all together to form one of the clearest introductions to oscilloscope techniques. Gonna suggest It to my students! Thank you Doug!
You're welcome, Fabio. I would be most flattered if you did recommend our videos to your students.
Uncle Doug so clear and distinct brilliant tutorial. I don’t know if you have done a video of analogue scope calibration but if you have could you possibly direct me to it, many thanks and go safe..
Just WONDERFUL, we’ve waited for many years for such a complete and easy to understand explanation …
Thanks so much, GP :)
The occasional program interruption with the idiosyncrasies of your pets is pure entertainment genius. Thank you Uniform Delta !
Glad you enjoy them, Julie Juliet :)
Boy did i need this tutorial, perfectly explained for newbies like me. Thanks for taking the time to explain this complex topic to us. I would really appreciate the follow up turtorial where the occiloscope is used on.
1) Battery powered items
2) mainsTransformers, with and without shared common between primary and secondary
3) Isolation transformers
4) Mains powered items
Like you say, there is so much hype, contradiction and waffle around on youtube its difficult to know what to believe.
Thanks again J...
You're welcome, IG, and thanks for your kind comments. I will show DC traces and fully intend to investigate the truth about isolation transformers.
Same here
"There is nothing wrong with your television set. Do not attempt to adjust the picture. We are controlling transmission. If we wish to make it louder, we will bring up the volume. If we wish to make it softer, we will tune it to a whisper. We will control the horizontal. We will control the vertical. We can roll the image, make it flutter. We can change the focus to a soft blur, or sharpen it to crystal clarity." - Vic Perrin as The Control Voice of The Outer Limits. Sorry, I just had to. Very informative videos on scopes. Thank you for your time in making these.
Thanks for your nostalgic input, Ross :)
Thanks, Uncle! Always glad to get notified you posted a new video! You always teach me something!
You're welcome, Scott :)
Just spent 35 minutes on the phone to my insurance company, 30 minutes of which was spent listening to their stupid jingle jangle music. Then, up pops an email notification from Uncle Doug. Sanity and blood pressure now returned to normal, thank you Doug.
You're welcome, Jeff. We try to be the affordable alternative to extensive psychotherapy :)
Excellent presentation....Very good explanation, which makes it easy for everyone to understand. Thanks!
In 5 videos, the 2 on isolation transformers, Oscilloscope Basics 1 and 2, and the dim bulb current limiter, my understanding of my scope has really grown and my confidence level in using it has skyrocketed! Thank you so very much Uncle Doug! I'm between job opportunities just now but as soon as I'm back in the saddle, I'll become a patron! All the best - Luther
You're quite welcome, Luther. It's great to hear that the videos are helpful :)
You are a very good teacher.
Thanks, Frank.
Thanks Uncle! You are a top notch teacher, and I applaud and appreciate your efforts! Cheers!~
You're welcome, Rick.
Thanks Uncle Doug! Great video. Very helpful.
You're welcome, GL :)
Love your teaching
Thanks, Sam :)
excellence is spewing from this channel
Thanks, Sean. We strive to be the Mt. Vesuvius of YT Wisdom :)
Being a person that has a dozen scopes and use them daily, these types of basic tutorials are great refreshers. Really helps bring us all back to the basic of how to use these wonderful pieces of test gear. Thanks for the great videos as always Uncle Doug. I really enjoy them. BTW I have one of the all time favorite solid state Tektronix scope arriving tomorrow on UPS. Will be doing some videos on getting this classic back up and running and adding it to my collection.
You're welcome, RS. Good luck with the restoration of your newly acquired oscilloscope.
UD, the scope series you have done is fantastic, thanks for answering so many of my questions I've had for years!
You're welcome, Dave. I'm glad it's helpful :)
Cant wait till part 3. Definitely interested in seeing this isolation transformer your building and learning more about using these as tools to evaluate and troubleshoot amplifier circuits!
I've been working on the isolation transformer video, DS. Hopefully, it will be ready to post in the near future.
Dear Uncle Doug, an excellent video, thank you for sharing this with us..
Thanks, Mark. Glad you liked it.
Absolutely clear and professional. Thank you for your job, Mr. Uncle Doug!!
You're quite welcome, Natalia.
this is very helpful.slowly explained and thus effective.thank you Uncle Doug
I'm glad to hear this, KC. Thanks :)
finally, a good and decent explanation on oscilloscope. thanks again uncle Doug.
You're welcome, B&P :)
Thanks Uncle Doug for lecturing me. I enjoy learning from your video 👍
I'm glad to hear that, Andy.
Excellent tutorial Uncle Doug. Thanks for your time and Jack is a noble predator 😎😉
You're welcome, CC. Yes, Jack has rid our house of all sorts of horrifying intruders :)
Thanks for another great tutorial Uncle Doug! I haven't used an oscilloscope in years and the refresher is definitely appreciated.
You're welcome, Thomas. Glad it's helpful :)
Outstanding introduction UD!
Thanks, Michael.
Great series! Even I know how to use the oscilloscope it's fun to watch it. With this series every interested viewer is able to learn how to operate it. Thanks!
You're welcome, Murrat :)
Thanks for this series Doug. I just picked up a decent scope after many years and the timing couldn't be better. I also enjoy the Jack interludes, he's a keeper.
You're welcome, John. I'm glad our interests coincided :)
Thank you. A very good basic review.
Glad you liked it, Glen :)
Excellent tutorials
Thanks, K3 :)
Great video of oscilloscope use for beginners.
Thanks, Scorp.
Thanks for posting this. I'm in tech school and we had a short intro to o-scopes, but I didn't get much out of it. This explains it perfectly. Subbed.
Thanks twice, Mike.
Uncle Doug! Firstly thank you for your amazing content and your kind and giving manner. I have learned so much. I have taken what you have taught and put it into practice restoring and repairing some amazing old amps.
I had the same problem with my roll top desk and a cat who would always “unfile” any paperwork in the pigeonholes onto the floor whenever it was open. Bad Kitty!
You're welcome, Jonathan. We're glad to hear that the videos have been helpful. There is something about cats and roll top's, I guess :)
I watched part one and two tonight, and they are both great videos. These are he best O-scope videos I've seen, and I watched a bunch. I just got my first scope, and am learning how to work it. I have a lot to learn, but your videos helped me a bunch. Thanks for sharing your knowledge.
You're quite welcome, Tony......glad it was helpful.
Excelent tutorial sir, thank you!
You're welcome, Sergio.
Great series Doug!
Thanks, Phil :)
These videos were immensely helpful. I bought a 2213 (very similar) because I knew I could learn to use it, thanks to your teachings. Bless you, Uncle Doug.
Great to hear! Good luck with it, Eugene.
Very informative as always ... We thank you ... )))
I love that little Model T truck.
Thanks, LD.
Thank you so much, I found your tutorials are very good comparing to others, special for newbie to electronic. really recomended.
You're welcome, Kevin. Glad it was helpful.
Thanks for the video. Very clear and concise explanation.
You're welcome, T. Glad it was helpful :)
Автору благодарность за отличное кино! Многие вопросы стали понятны.
Это хорошие новости. Спасибо за просмотр.
You must have been one helluva educator! Excellent job sir.
Thanks, Pete :)
Doug, I love hearing your gentle slow talking voice which explains things very clearly to me.
I have to think hard about the math part with how many thousands of a second are the same as so many hundredths of a second etc. This has always never clicked with me.
Mental block.
But I will keep watching your fantastic videos.
You make us WANT to learn and you don't overwhelm us with your cleverness.
Thank you kind Sir.
Ps...love the cat too.
Pete
Thanks so much, Peter. Our goal is to convey useful information, rather than self-glorification, and it's good to hear that this approach is successful :)
Two excellent videos on using the o-scope. My cat would come running when he heard me tearing up a newspaper. When you laid it down he would carefully tear it into strips.
Thanks, Bob. Cats are crazy guys :)
Very detailed explanation anybody who understand electronics can learn from your videos, keep up..
Thanks, will do!
This is great for new scope users like myself... we need to start somewhere..basics understandings are important. Thank you.
You're welcome, GF. Good luck.
Another very informative video, very good explanations of the timebase function and triggering. Great demo with the signal generator too. I wish I would have had an instructor like you all of those years ago back at tech school. We had a cat “Katy” that loved to chew on those orange disposable fingernail files, sharpening her teeth as I always told my wife. Our dog “Heidi” comes running when she hears the freezer drawer open to get an ice cube.
Thanks so much, Mark. Our pets never cease to amaze us with their quirkiness......just like people, I guess :)
Jacks back! That’s the first thing my buddy and I noticed about part 1. That and how bad ass 409’s look. Small blocks in everything would be like 12ax7’s in everything. Great job as always!
Thanks, Todd. I agree, 409's are the KT-150's of the engine world :)
Cats are fun to watch. When they jump up onto something they first carefully survey the height and then proceed to calculate the exact amount of effort required to just barely clear the edge..... making sure to not over jump or expend any more energy than needed, and they rarely under jump. Doesn't matter if it is 10 inches or 4 ft.
Thanks UD for this series. I have always wanted to learn how oscilloscopes work. Your method of presentation is always enjoyable. It is hard to misinterpret the information you provide due to your unique teaching approach.
You're welcome, Scott. I agree about cats.....their economical athleticism is always impressive to watch :)
Hey UD, also meant to mention publicly that I am really enjoying the Newcomb. You did a fantastic job with the conversion, not to mention it is practically brand new looking - inside and out. Heck, my wife even enjoys hearing me play for a change, lol.
Thanks man. You are teaching a 15 year old who is planning to get an analog oscilloscope how to use one.
I'm impressed that you're starting so young, EZ. Have a great career.
Cool house take care uncle Doug. Watched most vids ys ago spent 2 yrs on rd. I really enjoy them. All things eternal are unseen. Rip Rusty. Cats a welcoming companions.
Thanks, David.
very well explained thanks a lot Uncle Doug and jack of course, you inpire me to make my own guittar tube amplifier, thanks a lot again
You're welcome, Pedro. By all means, build your own amp. It's a great hobby.
Great video Doug, i have a very similar tecktronics scope and have used it for years without really understanding exactly what every knob does and why. After your last video i quickly checked the calibration and found one of my probes was way out! Will be doing the same on the time div today!
Thanks, Bill. To be honest, I don't know every knob.....but at least we'll know enough to work effectively on amp circuits.
Thanks Doug, been watching for awhile. First to say Hi though. All yours vids are awesome.
You're welcome, APB. Thanks for commenting. Don't be a stranger :)
A very clear explanation. Uncle Doug, I wish that those fellas that print manuals for High tech stuff (especially Seimens and Rockwell) should have you layout the method of instruction in their manuals. After the new manuals cover their asses with all of their safety warnings and disclaimers. They usually start with the first items of explanation with the understanding that the reader knows nothing about the device the manual has been written for. Then, after about a page and a half of good basic explaining, the tone of the instruction becomes that of an explanation to somebody that already knows how the device operates and only needs to be technically tuned up to be able to understand how to install, calibrate, commission, and troubleshoot the device. A big jump in the way the information about the device is being presented. Your explanations have no such surprises in them and leave the instructee with a much clearer understanding of the subject by the end of the instruction. Why the big guys can't follow your example is beyond me.
Siemens and Rockwell... bet you're talking about PLCs and/or drives. That's the stuff I've worked on most of my life and I've concluded they write those manuals like that on purpose. That way they can sell you training to the tune of $500 or $1000 per day, slow paced training that keeps you buying more and more classes hoping to get to The Answers some day.
Actually, if the manuals or training were any good I'd probably be out of a job. With good manuals, electricians and maintenance men everywhere would soon figure out that what I do (industrial control systems from scratch, plus troubleshooting and repair) is not magic at all.
And yeah, Doug is an excellent teacher. Heck, I've been using scopes for ever and ever, but I still come here to enjoy how he presents things. His style reminds me of a math teacher bacm in middle school who quite literally changed the course of my life...
Thanks so much, Tony. What you describe is exactly what I try to avoid. There are millions of people anxious to learn all sorts of technical skills.....but sadly, they are let down by engineers who are either unable or unwilling to provide effective instruction. This is largely why I became a math and science teacher many years ago, and why I have now turned to TH-cam to continue trying to reach the masses with instruction that can be comprehended.......and not dreaded.
Thanks so much, Sooti. By coincidence, I chose middle school for my teaching career. It's the perfect time to shape students, before they become "hardened" in high school and college.
Thx Uncle Doug and jack😎 excellent as always!!
You're welcome, Ken :)
Ken, you must have had something hold you up on this one. I noticed you were not first this time around. No shame in that.... Uncle Doug's videos are always worth the wait if necessary.
yeah my internet went down lol. the tech just left ;-)
It's good to have you back, Ken :)
thx. yeah you can tell who leaves feedback from there phone by the empty boxes or an x in a box from the emoji's. yeah gotta get the doug n jack info anyway you can. even the small phone screen works in a pinch! :-)
So far this has been a great topic of videos! I have tried to watch other oscilloscope videos and they either confuse me, put me to sleep, or both.. Your explanation of this topic has inspired me to dig out my scope and use it. Thanks so much for all your efforts Doug . You are truly keeping this technology alive!
You're welcome, Aaron. I'm really glad to hear that my presentations are relatively understandable and not a substitute for Ambien :) It's our goal to present this information in an effective way.
@@UncleDoug i have seen videos where they recommend you use a isolation transformer is that requiered?
Not to change the subject...ha ha ha... I also have a BLACK CAT like yours, saved from certain death almost 5 years ago, when she was as tiny as it gets, almost cold to touch; but she made it! Now she provides us with love and despite Shadow's "drama queen behaviour", she is a loving cat! Thanks for your videos!
You're welcome, Tony. Best Holiday Wishes to Shadow.....and her entire family :)
I have three rescued dogs, and in the past I have had rescued cats as well. Sadly, black dogs or cats are far less likely to be rescued or adopted; apparently for reasons of religious superstition. Sometimes I wonder if we truly live in the 21st century , or if we have been transported back to the Middle Ages. It's not like the animal can self-determine its own color scheme prior to birth. Anyway, thank you for rescuing an animal. I personally tend to identify with those paw- shaped bumper-sticker magnet things that you see on cars which ask the question, "who rescued whom?"
Thank you for your kind words! Cats are a living creatures and deserve to have a safe place - living outside here in Nebraska during winter can be very difficult and many cats don't survive! The cats gave back us -and keep giving us- many great feelings and their personalities are so different, but so much fun to observe. Helping people is also very rewarding and it brings back much more than the original investment! Just like you observed about black cats and how they aren't adapted, compared to other colors...., but also what you say about "Middle Ages".... is sad. Just like people who have not learned (I'm including myself here also!) from our past mistakes, we are likely to repeat the same bad decisions! Good example is communism/socialism and or Egypt and Rome.... they all destroyed themselves from inside out! It is so sad but that is how we people do things!
You're sending me back to school here and I wish you were my teacher! It would have a loooot easier! And how cool is a prof. that is a guitar player and amp tech? The coolest!
Thanks so much, Philippe :)
Great topic/information presented with Uncle Doug's patient and concise delivery, thank you! (Btw, I am math/cs degree with a budding passion for EE)
Thanks, A1. You sound like a natural for an EE degree.
Excellent, really helps a lot! Thank you!
You're welcome, Shy.
Caught this on Patreon already...but came over here to go full screen on a couple of spots. Thanks again for
sharing your vast knowledge(8-).
You're welcome, Tom :)
Great video, I have never really understood the triggering until your explanation. I am looking forward to the isolation transformer video. And...First!
Thanks, Paul. I glossed over a bunch of technical details that are better left to future, for those who choose to pursue all knowledge of the oscilloscope. In the meantime, we'll simply move on with a reasonable and adequate overview :)
Uncle Doug.....Where were you in 1969, as my beloved military instructors (who were most definitely never trained as teachers) tried to convey the same information, albeit somewhat less effectively! LOL Thank you so much for prompting my aging gray matter to organize and remember the most basic of O-scope info! Without your patient, concise instruction, I *might* have figured it out on my own.....but would I have taken the time?? Your efforts much appreciated! :-) I look forward to every new video that you take the time to produce. Thank you.
You're welcome, Norm. I'm glad the videos are helpful :) Sadly, in 1969, I was drinking, drag racing, carousing, and doing all sorts of disreputable things.....not including much work with oscilloscopes :)
thanks for you timeGod bless you
You're welcome, Gahlan. Likewise :)
Great video interesting thank you
Thanks, Ron :)
Thank you!
You're welcome, Tyler.
Another great vid Doug. Looking forward (as always) to more. Love how you incorporate Jack & Rusty into the action. I have a feeling there'll be no way for me keep my cat (Ask'er) out of my videos. She's just GOT to be front and center whenever I'm doing something. She's smart enough to give the soldering iron a wide birth though, lol.
Thanks so much, CA. Jack does tend to insert himself into all aspects of our home life.....much to our delight :)
Ahh! Jack and his pipe cleaner! I'd love to know what he thinks about the dancing lines on the oscilloscope! Great tutorials. Love from Pete in the UK.
Thanks, Peter. Jack is bored by oscilloscope images, vastly preferring to chase moths that sneak into our house when the door is open at night.
very helpful. ty
Thank you and hello to Jack.
You're welcome, Anthony. Jack says "Hi" :)
Great tutorial.
Thanks, Jennifer :)
Thanks very much sir I understood most of the part explained.
You're welcome, PK.
@@UncleDoug you said absolutely right that most of other videos just toggle switches and that does not make sense. It would be great if you can make a video on oscilloscope dealing with batteries, home supply and checking circuits with oscilloscope. Also I have a single channel osci. (It was cheap). So just wanted to know that does it worth to buy it.
Thanks, PK. I'll keep your suggestion in mind for the future.
Thank you for another informative video. My cat is fond of finger picks. Everytime I play the pedal steel guitar, when I quit playing, she knows it is times to steal my picks.
Maybe your cat is trying to learn how to play the guitar. This is how Jack & Ollie got started......stealing my picks.
While an instructor with the US Navy we taught our students that before they could touch the probe to a particular portion of the circuit they had to be able to draw what they expected to see. Voltage deflection/frequency/offset/etc. It may sound difficult to do but actually is essential to understanding what you are looking at. Once you know what to expect you can go to the scope controls and set it up so when you do touch the probe to the circuit you will know if it is good or bad. When I see techs attaching to the circuit and then adjusting the scope controls to get a good presentation it makes me wonder if whatever they end up seeing is really telling them anything they can use. Using this process of figuring it out first and then looking at it will make you a better tech and sharpen the tools in your skill set.
That's a very interesting idea, Thorerik. Thanks for sharing it with us.
Superb! Thanks so much for the instructional videos, top notch! Now I need a scope Dear Santa....! Looking forward to the isolation transformer video and more oscilloscope practical testing etc... Great stuff indeed!
You're welcome, CB. Thanks !!!
@@UncleDoug Would be interesting seeing you put that O'scope to work on an amp circuit with a problem and explaining what it shows on the screen. That is if you haven't made that video already.
Thank you
Awesome! Please part 3😅
Thanks, V1. Maybe some day ;)
Thank you
You're welcome, B.
A very welcome video! Your signal generator is awesome. It may be worth noting that smartphone stereo signal generator apps are readily available for free. All you need to do is rewire a an earbud jack to something more usable, such as quarter inch guitar jacks. Waveforms might not be mathrmaticslly perfect, and I doubt you can get a million Hertz, but it works really well and costs nothing if you have a smartphone.
Thanks, Lindsey.....for the nice comments and the smartphone info. Hopefully, viewers who lack their own signal generator can avail themselves of this app.
thanks so much...
You're welcome, Charlie :)
Another great video Doug should really help a lot of people to dust off those scopes. Mark
Thanks, Mark. I hope so. They can be a very useful tool, but often end up languishing in a store room due to a lack of understanding.
And again thanks.
You're welcome, Johnny :)
Good tut vid Doug. For those looking for a used analog scope, your vids show how nice the Tektronix scopes are. My B&K is much more simplified than this. The little extras can make a difference indeed. Look forward to more good stuff as always. Thanks pal.
You're welcome, Carl :)
If it was "scotch" tape, I would understand, otherwise Jack is just a kooky cat. :)) Again, perfect instructions. I must admit to using the "inverse key" rather than doing the 1/ on the math portion. Looking forward to the isolation transformer build.
He is indeed, Andrew, and thus he fits well in our madhouse. Thanks so much :)
Good day sir, thanks so much for this osilloscope lecture, I really enjoyed it, please I need more lecture on how to troubleshoot faulty on electronic circuit with osilloscope
Thanks, DES. I will keep your request in mind for the future.
mestre Uncle gostei muito vou comprar ocilloscope para uso nos meus amplificadores
valvulado é uma ferramenta mais eficiente eu imagino obrigado por postar vídeos
com conteúdo importante South of Brazil
Obrigado Jorge. Eu acho que você gostaria de ter um osciloscópio. Espero que você possa encontrar um em sua área. Boa sorte.
Masterpiece!
Thanks, MP :)
Although this is stuff I already know, still a great tutorial for beginners. The next video sounds interesting, so I'll remember to stay t...
.......uned. Thanks CDC :)
Thanks again Doug, great explanation as always! Are you planning a video series on solid-state electronics? I'd like to see this pro teaching skills in action on transistor based guitar amplifiers. There are a lot of great circuits to work on but they are more complex and hard to read the schematics than let's say a small tube amp. I would be pleased to gain some knowlage on that topic, too. Cheers from Hungary!
You're welcome, Andras. Jack and I specialize only in vintage tube amps, so videos on SS circuits seem like a long shot.......but we'll keep it in mind.
Excellent introduction to oscilloscopes from someone whose explanation-skills are honed to the max. Besides all your great explanations, there is a questions that burns under the fingernails of your devoted viewers: Is Jack only crazy about US-brands like Scotch or 3M, or is this furry connoisseur of adhesive tape also acquainted with the more exotic flavors of sticky comestibles like the German Henkel/Pattex-brands? :) Good show, thanks a lot for sharing!
Thanks so much, KL. Thus far, Jack has only been exposed to boring domestic brands of tape, but some day we hope to be able to serve him a big steaming plate of Henkel/Pattex to go along with his Heineken beer :)
My mind exploded at the tape eating part
It's actually rather tasty, Matt.
@@UncleDoug Are you trolling me, sir?
Damn I missed the bonus question. I got 7.5k frequency, an obvious got ya question aimed at beer drinking watchers losing focus. What a fantastic learning experience!
Yes, those tricky questions do tend to weed out the beer guzzlers......myself included ;)
Great instructional videos on the scope !! Well done and explained !! BTW couldn't help notice the model # of the scope, I have a model 2210 along with two other Tek scopes, both 2 channel, 1 is max 250Mhz, 2 the newer one is 400 Mhz,,
Thanks, John. Wow.....400MHz is ten times the frequency of mine. I would imagine it might be well suited for radio work.
Hello Uncle Doug ! Yes you hit the nail on the head with that statement! Yup a Ham I yam :-) :-) KC2UVN is the call sign ! I love the hobby, been playing with radios since I was in my early teens so I have been playing with them since the days when vacuum tubes were KING!! Its nice to sit down and listen to the old radios and bask in the GLOW of the nice warm tubes on a COLD winters night ! the large old AM and single side band transmitters become an efficient shack and or bedroom heater !! I have a Collins KWS-1 transmitter from the late fifties and those Blower COOLED 4CX250B's throw off a good amount of heat when transmitting CW !!!! Enjoy your videos, I remain ------------ John Bellas KC2UVN, 73's my friend !!
Back at ya', John. Stay toasty :)
My favorite teacher on all things tube. I thought you had mentioned that you were going to make a video actually using the scope to troubleshoot an amp or audio receiver but I looked through your list of videos and didn't see one. What am I missing?
Watch the more recent video on silencing the amp that could not be fixed.
Good job as always, if I may I would like to suggest that when measuring frequency on a periodic signal it is common practice to adjust the sweep rate such that you have at least one full cycle on the screen and only one full cycle. The frequency is then the number of boxes times the sweep rate divided into 1, which is really what you did without having to worry about how many full waves you had because it is one. If that makes sense? Anyways good jog and thanks for sharing.
You're welcome, Michael. Thanks for your suggestion.
Great video again..a quick question please...if a scope doss not have a ch1 bnc output on the back of the scope to say send the signal to a frequency couter , how is the best way to set up a t connector on the scopes ch1 input ensuring that just enough signal is taken from the scopes ch1 input (ie ..i want to limit the signal at the t connector so it is just enough to trigger the frequency counter)
Thanks in advance.
I only know the procedures that I have personally worked out and perfected, Andrew......and I have no experience at all with the problem you described. My suggestion in cases like this is to simply use trial and error until you find a solution. Good luck.