1962 "TROUBLESHOOTING TRANSISTOR CIRCUITS" Technical Training, Vintage Electronics Equipment in HD
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- Опубліковано 25 сер 2024
- For review and discussion, we examing the following film on Vintage Electronics (1962) - "TRANSISTORS" a very high quality training film explaining the functions of transistors, circuits, testing methods and skills to be learned. Well paced, exceptionally good quality and lots of vintage equipment. Explains the differences between vacuum tube circuit testing and transistor circuit testing. (Part 7 of a series, but stands well on its own.) Run time: 29 minutes. Uploaded by Computer History Archives Project (CHAP)
Special Thanks to: Speakeasy Archives for digital transfer of the original 16mm film
www.speakeasyar...
My father worked for RCA. In honor of his vocation we have a TV repair kit with about 50 vacuum tubes, and a few testing units. It was nice that he had this interest because we were always the first to have the latest technology---transistor radios, color TVs, microwaves and stereos.
Hi Patricia, sounds very cool! I bet that was a very interesting job your dad had at RCA! ~ Victor
I feel old, this was my job when I was 19
A very well done training film. Anyone notice that the base to emitter voltage was stated as 0.3 volts in properly working circuit? The transistors would have been made from germanium not silicon which has a higher Vbe. This training film is certainly better than some of material I saw when learning about electronics. Going to watch more of the videos on this channel. Thumbs up.
Hi Djaypaz, thanks for the kind words. Glad you enjoyed this! ~ Victor, CHAP
I wish it would have been explained as clearly as this back in my classroom days.
Navy electronics tech "A" school, TI, 68-69, ham club, K6NCG. I was one of the last of the mostly all-tube classes. We had all of 4 weeks on "solid state". NAS Miramar, 70-74, I maintained GCA RADAR and TACAN. Nowhere I was exists anymore, not boot camp RTC Sand Diego,, nor TI, nor NAS Glynco GA, and now Miramar is in the hand of the Marines. I am old LOL
Hi fourfourty RoadRunner, that is quite a history of tech training and experience! Having seen so many changes over time must give you an interesting perspective. ~
fourforty Roadrunner - Hello! I was USAF airborne electronics countermeasures tech during 1967-1971. Lots of vacuum tube stuff back in my tech school, as well as some transistorized stuff. Ham radio op here as well. Ended up following electrical engineering as a career, retired in 2011. I can sympathize with your feelings of history being erased. Many of my bases are gone now, even SAC disbanded. Those were fun years, of a lot of learning.
Navy avionics training at NATTC Memphis in 1987 still had mostly tube training with only a few weeks of solid state.
Wish I watched this 40 years ago saved me a lot of learning
I watched the Navy version 45 years ago.
A lot of what we learned in the 60th was totally obsolete in the 80th. Eg. Teletype, punch cards, vacuum tubes, dial phones.
Absolutely one of the best instructional video's that I have ever watched! Very informative! Even though the video was produced in 1961, it is NOT obsolete whatsoever! It is necessary to understand the old with the new. Please reply. Dave...
Hi @daveridgeway2639, thank you very much for your feedback on the "Troubleshooting Transistor Circuits" video. Glad you enjoyed it. Sometimes these early films seem to capture some of the basics quite well. They often hold their value for years. Are you involved with early circuits and electronics? ~ VK
@@ComputerHistoryArchivesProject No, but I am just simply interested.
Very cool.
I have some of the test equipment shown. I use it when restoring and servicing my old military radio equipment.
I got the radio set and the Signal Generator which was showed in the Video. It is the SG-12A/U and the PRC-25 Manpack radio. This radio still got one tube, the xmtr final. The receiver he got on the bench is a R-442 and belong to a vehicle radio installation with the RT-246 or 524 VHF 50W radios.
I love those old tutorial videos.
haven't seen these videos for AGES! blast from the past.
Hi killerorca1, thanks for the feedback! Glad you found our channel. BTW, we will be uploading another tech video on TRANSISTORS by Sept. 10. Perhaps you will find something of interest in it, as well. ~ C. Hunter
Good troubleshooting ideas and procedures.
Hi Barton, thank you for visiting our channel. Glad you enjoyed this video! ~ CHAP
This is absolutely great video of understanding how to troubleshoot transistor and vacuum tube equipment. Wish saw this years ago when I got started and was struggling to understand it. Thank you for sharing! Have a great day! Regards, JZ
Hi Rado Fixer, thank you very much. Glad you enjoyed it! ~ Victor, CHAP
I learned some new tricks too with this.
Get your ham radio license and you'll learn even more. Maybe a commercial license too.
The joy of having to study Totem Pole Amplifier ^^
great video well explained better than today's values easier to understand
I really like all that old test equipment on that guy's bench !
Me too. I bet it was very costly when new, and now that it is vintage, would be great to have as collectible pieces! ~ Hunter, CHAP
Thank you for posting this training video. We were still watching training films from this time period when I went through Navy Avionics “A” school in 1980. Aside to having the newer Simpson 260 multimeters. Everything else in this film was and still is very relevant. I might add though that I can’t believe that they left out all five senses. What technician with any time under his belt has not used smell to identify or localize trouble?
Hi Rick, thanks very much for your great observation! Yes, they should have included the smell test. Remembering way back to my TV/Radio repair days, the smell of a burning capacitor was different than a bad transformer or bad vacuum tube. I had forgotten about that. Any smell from a circuit was a sign to look for something. Thanks for jogging this memory! ~ Richard Kimball, at CHAP
Well Said! yes the nose is very often invaluable as many materials can be found in a radio circuit
I learned electronics at Ft Monmouth NJ 1972 , good stuff 👍👍🇺🇸
Very cool! I bet it was good training!
Great learning experience! Excellent blend of bulletized key points and right visuals that surprise us, given the age of production of this film. Superb narration that is easy to follow. Thanks for this educational video.
Hi Raghunandan, thank you very much for your kind words and feedback! ~ Victor, CHAP
This is what tech school was for me 5 years later. BUT, we had to learn about tubes too, and had to scratch build a tube superhet am receiver. I was in the last graduating class that had more tube theory than transistor theory.
@@badscrew4023 AKA hollow state technology. ::-)
Great lesson. Thanks
Glad you enjoyed it. ~
When the intro music started, I thought i was watching a horror movie. LOL. Great vid.
Well if you turn the transistor upside down it looks like a pitchfork I think the reapers after you 🤭👹♨️🛐🤗
@@SS-mj2mq LOL
@@frankowalker4662 😂😂😂
I'm glad you got a laugh I did too
I didn't watch video, just thumbed around. I'm not surprised to hear that. Very appropriate for videos like these. It's not pre-WW2, but one thing I learned is, a lot of pre-WW2 shit carried over into the 1950s, 60s, and 70s. The more I learn about that, the more I don't like it. This would explain why I stopped studying electronics. It's the history.
Surprising, or maybe not, how much of this information is still sound technique in 2021.
Most of it, but Si transistors are more likely to go shorted, and Ge transistors are more likely to go open. Ge transistors also have higher inherent leakage and are generally more delicate. Also, these days we often make all the transistor measurements with respect to the base or emitter rather than circuit ground, making it easier to not have to deal with whatever the B+ voltage level is relative to the transistor. Oh, and the B-E drop is .3V for Ge and about .65 for Si.
One important difference was eluded to in the film without being specified exactly. Old ohm meters used very high currents on the X1 and X10 ranges that could instantly fry small signal transistors, and also used fairly high voltages, 3 or 6 or even 12V or more, that could also fry transistors and tantalum capacitors and the like. Modern meters use much lower voltages and currents that are much more unlikely to damage equipment. Also, old volt meters were usually a fairly low impedance, and could change circuit voltages when you measured them, resulting in erroneous conclusions.
Great observations! ~ C. Hunter, CHAP
Wanted (and got) a transistor for my 12th birthday in 1956 (OC72). Had no clue of what to do with it.
21:54 Although not in saturation, IF the transistor is in saturation, the Vce should be very low (in the neighborhood of .2v). I think that would be something worth mentioning.
Simply superb!
I learn a lot thanks for this sir
New Tech TV, you are very welcome. Glad this was helpful. ~ Victor, CHAP
Rule 1 don’t use a pencil to fault find live circuits it’s carbon “lead “ is conductive I tried tapping for dry joints on a eht transformer in my youth Very shocking results
Pencils have never been lead they are a graphite clay mix still conductive but not lead. Details matter, especially in engineering.
I always made a copy of the circuit diagram of the device which I work on, so I can make notices about the measured values without ruin the the original service manual. And I use a pencil, but not to poking in the wiring.Just to make notices.☺
Thump up for this video!!
nice
"Make sure the battery is properly installed" WHACK! Not enough smacking the devices in todays electronics :)
Percussive maintenance for the win!
I noticed that too. Pretty sure most solder joints would be compromised if the connectors were not mechanically attached. Today’s electronics would surely fail from that.
Good informative video. Lot's of information but, the question on my mind is: Why is everyone in the video wearing their rank insignias upside down? As a Vet, this is the 1st thing I noticed. Was their some kind of rule back then that only active duty could wear proper insignia when being filmed? Inquiring minds want to know!
Hi Badjasper, thanks for the question. Have no idea on this one. Perhaps someone watching will give some insight. Thanks! ~ Victor, CHAP
The insignia marks them a s "Specialist". Wikipedia has a great article. en.wikipedia.org/wiki/Specialist_(rank)
I just thought it was a master sgt. who had lost a bet or had a really bad tailor. :D
Hi Charles, thanks very much for the info! I learned something new today! ~ Victor, CHAP
Awesome content.
Thanks for this it has some helpful tricks.
Hi Denver, glad you enjoyed this. We also have another in this "Transistor" series being posted very soon. ~ Victor
The transistor--top 5 of humanity's greatest achievements. (just my opinion)🖥 If only I had seen this in sonar school.
@ 11 mins ... Sight . Sound .. Touch ... He forgot to mention the SMELL of the "Magic Smoke"
I still have all my old reference manuals for testing valves. Today it is swop or replace,not repair.
Hi Desert Child, yes, very true. ~ Victor
That battery owed him money. 😮
Muito bom... gostei muito desse video
Very nice. Are you viewing from Brazil? -
1: To repare a Circuit board, You need to be a military 🏅🥉🥈🥇 2: Check that the battery is properly connected 🔋🔨
The way he slammed the battery into place.... 😆
This video assumes the transistors are germanium, and not silicone. The normal bias conditions for germanium is 0.3 volt whereas for silicon it’s 0.7 of a volt approximately.
Looks like a PSM6 multimeter, a TS352 multimeter and an OS-8 oscilloscope. Don't remember the model of the sig gen, looks kind of similar to an AN/URM25.
"Assume nothing" - wise words.
Yes, my training at IBM included that word, it was broken down this way ASS U ME. In other words if you assume something it'll probably 'make an ass out of u and me'. Never forgot that.
Why all these 60s documentaries look same ? The intro music, the voice over? Must be a cultural thing ? 🤔
But still the video is of top quality👍☺
Haad, thank you for your great feedback. Glad you found our channel too. ~ Victor, CHAP
@@ComputerHistoryArchivesProject its an interesting channel indeed ☺👍.
Back then there was only three stock music records low budget companies could afford. Heck, since we hear that same horrid music in so many movies, I bet it was free in the public domain! I think there was only about three announcers also that the average film maker could afford. Narrate your film for five bucks? You bet!
@@videolabguy Maybe, But that vibe is kinda cool ! :)
A shout out to Mr Carson’s lab
Hi Chris, Mr. Carson's lab is one of my favorite channels!
which way to the chevrons in his sleeves point?
He's not a Sargent he's a Specialist, A Spec-9, E-9. Now they only have Spec-4 or Spec, E-4 ranks now.
5:20 did you hear the jet engine ? :)
Hi Mepacrina, Yes, had to listen closely, but you're right, heard it! ~ C. Hunter, CHAP
transistors can get somewhat hot if they are faulty
Hi Larry, good point! ~
I wonder if a similar film for valves has been uploaded.
Sure. Go look at the Periscope Film channel. You will find several of them.
Yes, www.periscopefilm.com has lots of great vintage material.
The music makes it sound like troubleshooting transistor circuits means World War Three.
Multi io... yes, it is a bit "dark" isn't it. : | Victor
The R-442 receiver looks like a prototype, or is it something else?
Not like my production version 442. I have that same signal generator.
@@thomaskitz1185 Nice! That signal gen is cool...
@ 1:58 no shit 🤣
ا
جميل جدا ورائع
I was very concerned that a slow moving awkward alien would destroy everyone in this film, thank god for the 50's and 60's it made us aware as to what to look out for. I've killed several aliens, though the police and shop owner dispute this claiming that they were Jellies on display..yea right, jellies.
Yeah you try and save the earth then get arrested for arson.
Try and fault find your mobile phone using this method
Divide the couch in half, search to one end. If you don't find it, then search the other end. :-)
@@lwilton,
I have to keep upgrading my phone, 'cause my dog keeps burying them in the yard. Even after finding them with the metal detector, they never work right again.
DE W8IMP/5
When ever did Sergeants in the U.S. Army where thier stripes inverted ?
He's not a Sargent he's a Specialist, A Spec-9, E-9. Now they only have Spec-4 or Spec, E-4 ranks now.
@@robertfalls5876 OK
I was a specialist 5 and they forced me to change to sgt stripes.
😮
Pre-made magnetic signs instead of just writing on the blackboard? Government waste!!!!!
That's so people could read it!
The boys in the sign shop need to keep busy. Only so many hours in the day to sweep up the shop and keep the chief happy.
Isolation transformers for troubleshooting? ...and what's a polarized plug? lolz
Right!? Not needed when we slam a battery into the device under test. 😆
Bang that sucker until it works! Except don't bang vacuum tubes.
Why does he say that high-impedance test equipment is particularly suitable for testing transistor circuits? Transistors have a much lower impedance than tubes. For example, in audio equipment, tubes want to feed 2,000Ω headphones, whereas transistors are more like 32Ω.
It was common for low-impedance VOM meters to use a considerable current for resistance, especially in the x1 range (sometimes more than 100ma.) This can burn out B-E junctions in the delicate transistors of the day. Some VOM meters used high voltages for resistance testing that exceed the max voltages of the transistor (22.5V was common in the day).
@@ScottHenion In addition a VOM has relatively low impedance measuring voltage, and could throw off the voltage readings that should be expected, or make the circuit malfunction. Remember that a VOM impedance is rated as "ohms per volt", so if you are only measuring half a volt the impedance of a 20Kohm/Volt meter is only 10K ohms.
@@lwilton If your full-scale reading was one-half volt.
The transistor won't last. 🙀
It's is just a fad. 😹
Hehe, photonicinduction would say " I poped it, no more transistor" :)