Відео

5:00 this part is exactly how i felt in university..

Hi, thanks for the video and the clear explanation. I think it is beter, though, to have the isolation tranformer first and the variac second on your bench. Quote from the internet: “Grounding issues aside, the isolation transformer first is the better way. If the variac is first, you will starve the magnetic field of the isolation transformer, causing poor voltage control, especially at lower voltages.”

I have to admit the person that picked those values did a cute little trick where they did the whole thing as close to 1V=1KR in the divider. Not perfectly, obviously they had to stick to a e series for the resistors (E96 in this case, or 1% tolerance resistors). Still, good on that person for not picking really out there values. edit: It makes life so much easier for the technician. I saw you had alan there in the comments looking at it all as currents as an ee would do. Once you hand it to the tech, you want something you can quickly model in your head

Things I remember... Some of the cans have 5 volt regulators inside. Surprise! The separate grounds were an attempt to reduce noise from the digital getting into the analog. Beware the ugly sidebands. Yeah, most of the schematics are a suggestion. Good luck! 73 es GB W3IHM

My Osborne executive stopped giving image a few days ago. It was working with an external monitor. I checked the voltage and it was generating 14V instead of 12. After removing the PSU, it started to click every second. I tested the voltage after the diode bridge, and it was 166, but according to the internet, it’s normal that the voltage increase after the bridge…. Since I’m not very good with electronics, if any of you have any tips of what I should text, I appreciate it. Thanks. (I wish in my small city of Idaho Falls I could find someone willing to take a look in exchange of $$$). But I couldn’t find any. Thanks guys.

I am not familiar with that particular instrument but wonder if the missing ground is provided by the wiring in the output connector??

I was hoping to see a practical application of this. As it is, I don't know what this is useful for.

I used to just use a towel until that one day that one of the many cutoffs poke though the towel and everything got interesting.

You have your handy little SEQURE rechargeable soldering iron. It might come in handy for fixing this Wavetek. 🙂👍

The LM395 is a high-gain transistor replacement with internal protection.

Weird that lack of ground in half the psu😮, beautiful instrument, they are impossible to get here, prohibitely expensive, i was lucky to find a motorola 2600 mostly working, good tube!, No modulation though, but no biggie, i gotta do a video about that one, i would love to see you working on one of those!

Oops, this video reminds me of a long time ago where the company I used to work at, still made detailed service-manuals. For every new product, us design-engineers had to sit for days/weeks with the guys writing the manuals… and we hated every second of it, would rather be on the bench designing/debugging new things…. And it was easy for us juest to update something, like a better power-supply, informing production to use this newer supply, and somehow the guys writing the service manuals were left out of the loop, as ot saved so much time. In my old age, and trying to find fault stuff for which no service-manuals exist, I feel like such a d*ck… yeah, I get it, in today’s throw-away society, who needs detailed service manuals??? But now I am questioning it all… as a young kid, I could peruse a schematic-diagram that was glued on the inside of most equipment, from radio’s to TV’s and even early microwave-ovens, and I learned so much from it. Nowadays, even if you manage to find a service-manual from somebody, it is just a monkey see, monkey do procedure… and then order a new PCB… no detailed schematics, nothing…. Somewhere the electronics industry has turned to the dark side… no time for the designer to sit down with a technical writer describing how the circuit works, showing detailed voltages and waveforms at specific points, and so on…. It is actually sad😢😢😢

también tengo el modelo 710 frecuenci counter , que tampoco dispongo del manual

hola ¿donde consigues el manual? un saludo

hola me gusto mucho tu video , yo tengo el modelo 461, hay pequeñas diferencias , exteriores pero interiormente es distinto , pero he visto que conseguiste el manual de taller del que estas arreglando , ¿donde puedo conseguir el manual para el mio ? gracias , un saludo .

Pin 9 is a ground from the main unit, been confused myself.

The suspense of how many repair sessions is a realistic addition. I've got a few boxes of in- progress projects!

Thanks.

Anchor electronics ?!, You must be located close to Santa Clara.. I been to Anchor so many times buying components ...

May have commented on this before, but part of my training in electronics at the start of my career in the Army was to remove all watches, rings, and other metal, including dog tags, before working on electronics. We did work around both high voltages, and low voltage high current supplies. If you've ever seen the results of someone getting a wedding or other ring shorted to a high current 5 V supply you'll be convinced that removal is a good practice ;-)

enjoyed this, thanks!

still labeled 'em QXXX tho. 😀

Cool. Non of that synthesized generator rubbish. 😄

I enjoy troubleshooting videos. Keep them coming!

LM395 is an IC that acts like a Darlington transistor, but adds thermal and overload protection circuits.

Those "weird shrouded male" connectors have been standard on computer servers for decades. The male end is IEC-320-C14. I think it's so that equipment can more easily have a "lock" mechanism that prevents accidental disconnect of the cord. Usually there is a little mechanism next to the socket that will secure around the cord, but this variac does not have such a mechanism. Some companies such as tripp-lite also sell them on computer extension cords. In that use case, the shroud protects from accidental electrocution of a user by covering a loose connector.

If any one wanna electronics book then comment me

Fun to work on? Fkn nightmare more like. Where do you even start? Make sure you take multiple photos of those coax cables before you remove them. You'll never get them back in the correct place otherwise.

6:00 DONT WORK FOR MOTOROLA SERVICE PROVIDER IN YOUR STATE JUN 17 2567 #POW

As an engineering student I really agree w/ the idea of practical and simple then the theory and complicated.

Have fun finding all the shorted tantalum capacitors! I lost count fixing mine!

I just looked CIE up. Sadly, Wikipedia says they closed permanently in 2022. en.wikipedia.org/wiki/Cleveland_Institute_of_Electronics

Incredibly educational. I'm new to the camera hobby. (3 years). And was curious to find an explanation. Thank you.

Just started watching the video. My money is on the Tantalum capacitors.

Sounds like Cptn. Kirk needs to make a visit to GoogleX. Yea, I am one of those "old timer" technicians. Still don't listen to us. I have had a couple of interviews where they fell all over themselves to get me to sign up. One I believed and did. That lasted about 30 seconds on my first day and then it was 'your an idiot' after that.

I have a JBC and a Weller on my bench, and wouldn’t want to use anything else for day to day work, but… I sometimes have to do some work on-site and for a quick repair I really love my Pinecil (which is a product very similar to yours). It also takes USB-C power, and so I just take a USB power bank and off I go, don’t even need a wall outlet! Very, very useful.

Thank you very much

I love that you are still creating content.One of my favourite educators on YT ♥

Bad news: the instrument doesn't work.... Good news: we'll have a great repair sequence video. 😂

I used a lot of wavetek stuff 3 jobs ago. I saw how the 3000's drove the PMEL guys nuts, but I love my 182.

Eek! I have the same animal. Five PLL goodness. The schematics in the manual are just suggestions. Mine melted it's power transformer once, so I have another hanging off the back, after a failed attempt to convert it to switchers. DON'T! - noise! noise! noise! The bottom plate once shorted with the can pins - bad. The pins come out of the teflon shoulders, too. I can go on, but I still love it. I used one as my LO on an experimental GPS receiver in the early 80's. It's sentimental, yep. 73's W3IHM PS - lemme know If I can help.

I find your videos helpful, because I'm trying to design an eyepiece that magnifies the image of a camera viewfinder. I want to mount the eyepiece ontop of the viewfinder. A simple telescope doesn't do the job, because the aperture is too small and it cuts off some parts of the virtual image.

A thing of beauty, a joy for ever! Makes me wish I had one.

Please, stop making this parts videos, just for the sake of having daily content, they are annoying, if they are annoying only for me please ignore my comment

are those red buttons on some of the rf enclosures?

I hope the seller was honest in his listing and you knew what you were getting.

That's old school wizardry 🧙‍♂️

A common fault with sig gens is a burnt out output attenuator. People testing transceivers and transmitting!

I would love to have an instrument with that functionality, but that baby is HUGE!

I have the 3001 (my 3rd backup signal generator!), inherited from one of my Elmers along with the manual thank goodness! They did change over to a IEC AC connector, guess they learned their lesson. Love this old bird! Should be a run repair...73 - Dino KLØS