Fix A Radio Receiver!
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- čas přidán 9. 07. 2024
- Helpful tips for electronic repair and circuitry diagnosis. For links, click the SHOW MORE tab below.
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: / mrcarlsonslab
#learnelectronics #fixelectronics #repairelectronics - Věda a technologie
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: www.patreon.com/MrCarlsonsLab
Hi Mr. Carlson I am trying to fix my Eico model 460 scope and I’m trying to find a .25mfd 400vdc, .1mfd 1600vdc capacitors. Do you know where to find them?
@@liamtheinventor1522 many places you can get capacitors. JustRadios, Radiodaze, ect. They might not have exactly what you need but you can combine 2 capacitors if you wanted exactly .25mfd............. .22mfd and .03mfd in parallel will do it.
@@zundfolge1432 thanks
@@liamtheinventor1522 yep! I collect and restore antique radios of the 1920s and 1930s. Nothing better than a radio that doesnt work......thats when the fun begins.
@@liamtheinventor1522 a little tip: Subscripe at patreon for Paul Carlson. There you find all information you need. Paul put many years in finding best sources for quality parts. There you will find your Eico capacitor source! And many help for all other things, including contact to Paul himself.
Love to see the alignment...thats a nice clean set, it 'deserves' to be put back in playing mode..
I agree. Asking us if we want to see an alignment is like asking a kid if he wants ice cream. You scream, I scream, we all scream for ALIGNMENT!
^This!
Another vote for the alignment video! I just discovered Mr Carlson's Lab, and i'm hooked. Been watching old and new videos as time permits. Thanks, Mr Carlson!
Yes! Please do the alignment. I would like to see the receiver at peak performance. You'll probably make it hotter than new. :-) De K8MB
Yes, it does deserve an alignment it be nice to see it getting tune!
alignment!
seconded
Turd!
Yes but only with a guitar string , a tuning fork and a stick of gum
"Screwdrivered!" - I remember my old college tutor on my TV/Radio/VCR repair course used to say "The Phantom Twiddler has struck again!" about this phenomenon. LOL.
It wasn't just DIY customers who would be Phantom Twiddlers, the poorly trained techs would do an I.F. alignment using metal screwdrivers. We always "twiddled" the ferrite cores with plastic trimmers designed for the job.
An alignment video? Yes PLEASE and THANK YOU! Thank you so much for sharing your knowledge and experience, I truly enjoy your channel.
Yes please to the alignment procedure, they're always an oppurtunity to learn... and it's an excuse to get another of your excellent videos!
Yes, Paul I would love to see you do the full alignment on this radio. I really love these old radios. Thank you.
Mr. Carlson's experience with tubes and tube equipment really shows. Not many people could look at the tubes and immediately know that they weren't in the right place and then know which ones to expect in the various stages of the radio.
I always go by a schematic to make sure stuff is where it should be. Here the components were replaced by substituting modern replacements but failed to
note where the tubes went and bodged the radio up in a failed alignment. It also helps to take lots of photos before and after of the work while progressing
with a shotgun job of component replacing especially around the tubes. Sure way to solder a part to the wrong place.
There is a subtle, but very important lesson involved here. Imagine how long you could spend troubleshooting that radio with the tubes in the wrong sockets? What would you do, knowing that it had been worked on? Even if you didn't have the back-story, you would see those bright yellow caps underneath and know the set had been worked on. *Once you know that, you have to know there is literally NOTHING you can take for granted*--but again, does that mean you have to check every wire, every solder joint...? I myself have worked on plenty of AA5 radios (mostly the 7-pin tube versions and this was 30+ years ago) but still, there for sure was something odd about the audio out tube and rectifier right next to the tuning cap. I will admit, it didn't jump out at me right away. I *think* I would have tried to get a schematic online which would probably have the tube layout and etc; etc; etc
@@pneumatic00 Never assume anything!
Just because someone worked on a radio and you see new parts in the underside don't assume they replaced a part with the right replacement part. Go over every circuit in the schematic to make sure it is right, make sure parts are where they should be and wired correctly to tube sockets. I give you an example of something I found in a newly acquired radio from 1948. A resistor was going into a solder joint and I wiggled it. It was just loose going through the joint of solder !
@@hestheMaster True words spoken. Mr. Carlson has plenty of prior videos showing no solder, bad solder, wrong wire placement and the list goes on.
Thanks to Mr. Carlson, now WE know.
You have got to feel for the guy who couldn't quite make it happen but you did a great job sorting it Mr Carlson.
Thank you for being so kind to my foolish mistakes on this radio. It was my first radio restoration and I knew the alignment was off from the beginning but didn't want to tackle that so I put it away. I always mark where tubes come from now but I was naive back then. Most radios and schematics show a tube layout but try as I might I could not find one for this.
You did a nice job Kiel, and that's just the truth. Little mistakes like this will get the best of us. Glad you enjoyed the video!
Thanks that through your mistake we get a real short, easy lesson in troubleshooting, the lineup path of the signal, and a ballpark alignment all wrapped in one lesson!
Kiel, here are a couple reference sites to help you identify radios and find schematics. radioatticarchives.com and www.nostalgiaair.org/Resources
Keep on learning and keep up the good work
Don’t beat yourself up you did an amazing job with that radio your work looks really neat and professional . Hopefully we all learn a little everyday on every job. Thanks regards Chris
that is a mod. 65X2, chassis RC1034, it is in "SAMS PHOTOFACT "#4-30 this radio went into production in early 1946 " HEY UHM " stick with it, you will learn( as we all did) at least no real harm was done to the radio( nothing got "SMOKED") be careful of the osc. coil/ I.F. transformers, if you let the smoke out of those items, you are in big trouble, they are not available!!!!!
I have one of these that I also did a total restoration of back in the early 90's - great radio!
Thanks for stopping by Fran!
(Sorry Paul, once I need to try something. Remove this if you find it unfitting:)
Hi Fran, do you know what shadow banning is ? Some are treated like that for years on your channel, for no reason. I can see my reactions there, but no one else can, including you. I found out after two years.
THIS reaction on Paul's channel is the closest I can get to tell you, unless I open another platform account (Twitter, Facebook), which I refuse.
Maybe check your e-mail accounts, I wrote to one of them to tell you.
Hope to solve this somehow,
Erik.
Well, no reaction at al. It seems that there are corners build into CZcams that just don't 'exist', but I still found one after being misled for two years. And Fran is in it; I can speak, but no sound is coming trough, I am only allowed to 'watch the Fran community', while there is clearly a text field that says: "Add a public comment...". But as soon as I watch Franlab trough another computer, all my comments there are gone. Weirdly misleading.
Thanks Paul, in any way a great channel here :)
Hey Fran, I have a slightly older 1945 RCA similar to this with a wood case, I never got around to fixing it, but I didn’t realize you were into tubes! Would you like me to send it to you? It’s yours if you want it... I’m thinning out all of my stuff and need to find homes for certain things, and I would be tickled if you wanted it...
This takes me back to my days on the farm in the 1950's when I used to watch my father as he overhauled engines to make extra money from the neighbors. He taught me a lot about mechanics, and, of course how to farm. One thing he always drilled in about working with farm equipment was to insure that all the screws and bolts were tight before you began a days work. So, for example, if you were going to mow, you went over the mower with a wrench and screwdriver and tightened everything so it would not work loose as you mowed the fields. When I first began tinkering with radios in the early 1960's after we moved to town and got electric power, I transferred that learning and messed up the radios I worked on by doing the tighten the screws thing after opening up the cabinet. I quickly learned that this advice does not transfer to electronics. I guess it takes a few screw ups, especially if you are working, as I did with no advice from anyone in the know such as is available today with the many how to's available on CZcams.
I had a shortwave radio growing up in my village. To boost up the reception, I would hook up the radio antenna to plumbing pipes. I absolutely enjoyed the late night dramas on BBC and Deutschwelle. Golden days 😀
i work as a service technichian. in my school i had a lot of electronics and automation but since then i never really had to do electronic troubelshooting. i like this videos and the chanel i finally get a grasp of it how to do it in a real world application. thanks :)
Yes to a full alignment! 😁👍
Aligning this would make for a very interesting video.
Thanks from George
It is always good to go through and watch and see a FULL ALLIGNMENT.
What an honor to hear such an old girl come back to life. Well done . . .
I see a Mr. Carson video posted, immediately like.
Don't do that. CZcams tracks if you are liking for liking's sake, or actually watching the entire video all the way through ..then liking.
Paul, you are doing the world a great service by bringing countless electronic items from way back when back to life. Not only that, you show how it's done, and you even teach others how to do what you do. Without you and others like you, the world would soon forget about the early days of electronics. Thanks for another great video.
We assembled a Heathkit Superhet as freshman in High School, 1964, electronics class. Still remember the amazement that it worked. Ended up going into the Navy advanced electronics program and on into submarine service. Thanks for giving us your videos, I for one would like (need) to see an alignment video. I have an old Marconi table top am radio that needs to be checked out. Thanks.
RCA model 65X1 from 1948. Tube compliment : 50L6/35Z5/12SA7/12SK7/12SQ7 . From the label that was on the bottom,
" For Finest Performance USE ONLY GENUINE RCA RADIO TUBES" I found Mr. Carlson's ability to find tubes put in wrong places fascinating and I hope whomever did that
never turned the radio on! But that person did mis-tune the radio and screwed it up! Definitely needs an alignment. Work was only half way finished.
It would make sense to put in a polarized plug, switch the "hot" side to the on/off switch, and add a fuse on the hot wire coming into the radio. Make it safe!
Yes please Mr. Carlson do the full alignment. I have a radio here my grandparents bought in 1956 right after their wedding. After a full electronic restoration (done with all the wisdom I was able to collect thanks to people like you, uncle Doug and Brad the guitologist on CZcams) it still has a few mechanical and alignment related issues I'd like to address to get it to full working order again after it spent most of its life forgotten in an attic. It might be a European model but I am absolutely certain you can give me the slight bit more of insight that I need to get this piece of family history back to its former glory.
I'm so glad I found this ....."aaaand it never worked again". I literally almost spit coffee all over my computer. This looks close to my Wards Airline model I've been wanting to go through so this is very helpful information. Thanks!
When I was a kid in the 90s old tube radios and TVs were a common find here in Bulgaria, I had a few models that I listened with every day. Such a wonderful feeling to see the tubes glow and to hear stations from across the globe. One thing I liked the most? The tube models and their positions were printed on the back. When CZcams recommended this channel, I had no other choice but to subscribe. So interesting and educational.
By all means, show us the alignment. Changing capacitors is easy - it's the Art of Alignment that makes me tune in to Mr Carlson's videos.
One of many things I like about your channel, you don't pull any punches but you do it in a kind way
"Screwdriverd into outer space" you say? Ask HandToolRescue, he's got the right screwdriver for you.
Yeah, made me chuckle
Mr Carlson I built a 7 transistor radio in an electronics course at a Community Collage. The kit had RF and IF coils, alignment took patience. We used the strongest AM station in North Texas WBAP 820 AM to tune the radio.
I love alignment videos! Maybe another VTVM one? Or something exotic from the old time workbench?
How about using nothing but the Supreme Vedolizer for the alignment?
@@richipedia47 Now your talking!
@@richipedia47 29:15 Paul says "give this thing a Supreme alignment"
@@richipedia47 that's what i was thinking!
Mr C. I always enjoy your time with us. I would sit in my Dad's Ham shack and flip on the receiver. I listened to enough code to want to learn it. I found it fascinating listening to voice and hearing the dx call signs.
Love to see Arnold is actually able to fix old radios, he's full with surprises.
Your super probe is so dang neat! Sniffs it right out like nobody's business!
Not one transistor or IC chip in it- and yet it works! Amazing technology that glows in the dark!
Full alignment PLEASE! Thank you for sharing your "back to the basics" troubleshooting technique then demonstrating simple ways to prove basic functionality. After watching you "peak-by-ear" I am going to take a working radio and play around with the adjustments to see for myself what happens. I would NOT have dreamed of such tweaking before seeing you do it. I find myself saying "Yeah, I can do that" at every step in all your videos - KEEP IT COMING!!!
Always good to watch you clearly and precisely troubleshoot things. An alignment would be good. Cheers
Here it is Pauline: czcams.com/video/WvkAznAG-7k/video.html
Yes, I'd like to see the alignment procedure. Thanks Mr. Carlson.
I just finished a complete restoration and alignment on this exact model. Mr Carlson did an excellent job teaching me how to get the job done right!
When I was a kid, I used to intentionally tweak the oscillator trimmer capacitor on my superheterodyne radio in order to listen to the police band. They've since changed frequencies but for some kid in grade school, it was a fun thing to do.
To those that feel they have to give a thumbs down to what a lot of us see as PRICELESS content, can I suggest we all would be better served by your sharing your POSITIVE comments and additions, or dare I suggest posting your own video for us to “see how it’s really done”. Paul is helping us all by putting himself out there and his generous sharing - at what we all can agree is a SIGNIFICANT effort on his part. Cowardly hiding behind a thumbs down adds absolutely nothing to Paul’s intentions or his MANY appreciative viewers. Sorry, I had to get that out.
There are people who just go round and give thumbs down regardless of the video content he could be baking cake for all they care.
I understand the sentiment but you have to remember the numbers involved. When tens or hundreds of thousands of people watch a video its an absolute certainty that a small but significant number of them will be one or more of: in a terrible mood, not very bright, clicked by accident, completely or partially misunderstanding something that is said, actually clinically mad etc etc. In short, when, as I write, the like:dislike ratio is around 200:1, there is no need to worry or even pay attention to the 1.
Wow, you knew the tubes were in the wrong place just by looking at the tops of them. I'm amazed. Thinking like a true engineer.
Very interesting troubleshooting procedure. Please do the alignment if you find time. Thank you Paul!
A full aligmentvideo, of course!!! Thank you. :)
Yes, please do an alignment video. I'm new to the radio and electronics hobby and I can use all the help I can get. I still have a lot to learn with equipment setup and connection points. Thank you.
I remember an old saying my highschool electronics teacher once told me back in 1978. "A little bit of knowledge, can be more dangerous than no knowledge at all". This radio is a good example of that. Cheers from Winnipeg.
I love this channel. I get lost in these.
I love this channel - Mr Carlson is very soothing to listen to and I learn a little more each time.
These antique radio videos are my favorite on this channel. Thanks. I vote for the alignment too.
Yes, please; a full alignment video. I have a virtually identical RCA whose alignment has been a mystery until now
Great! Yes, we want to see the full aligment (step by step please!).
Your knowledge never ceases to amaze me. You are the best on the internet. Please don't stop.
My grandmother had the same exact radio. It lived in her kitchen. I certainly would like to see a full alignment. Too bad her's is long gone, with her. I remember listening to it in the morning to WOR in NYC back in the 1960s.
Another great video Paul! I look forward to your videos along with Joe Smith’s videos( multimeter robustness testing mostly). You two guys have the best EE chops on CZcams. You both design and build your own test equipment, can just look at the circuit and find the issue with little testing, reverse engineer circuits, you both are very good at mechanical work and engineering also. I was a mechanical engineer/toolmaker/CNC programmer most of my career but always had interest in electronics since I was a kid. Being a gigging guitar player for the past 40 years I dove back into that pool when all the good old techs I trusted started to retire and unfortunately pass away. A lot of books before the internet on the subject and these days videos from guys like you and Joe have gotten me to the point of being the guy in my area that most bring their tube amps to for repairs. The last few years I have gotten into old tube radios too. Just wanted to say thank you and others with amazing skills for sharing your knowledge. I’m also a subscriber to your Patreon channel and love the projects and the details of schematics and parts list. Keep the videos coming!!
I use your videos to learn how to troubleshoot electronics effectively. Every single time I watch one of your videos I learn something new.
I vote for a complete tuning if you can. As always Paul GREAT! video, Thanks!
I would like to see the alignment. At present, know just enough to get myself into trouble so will continue to watch your videos and build on your knowledge. We used to "fix" our radios and tvs by pulling out all the tubes and going to the grocery store which had a tube tester and tubes for sale. 99% of time I was successful. I have Crosley, Arvin, radios as well as others. My Crosley clock radio which i "repaired" in 1960 is still working well but clock quit about 20 years ago. Would like to get it back up and running so am also learning to work on watches and clocks. Thanks ever so much for your producing these wonderful informative videos.
You're very welcome!
Find your videos captivating. I know nothing of electronics, yet I'm still drawn into listing and watching. Perhaps it's your methodical approach and knowing something is getting fixed or repaired. At any rate, interesting.
An alignment would be good. I know you've done them in the past, quite a few actually, but they're always interesting to watch. Thanks Paul.
Yep, another great vid! Love to see a full alignment!
I am amazed with your clear explanation and knowledge . Mr. Carlson's Lab is the best!
Add my vote "Yes" on the alignment video....I'm still very much learning the vacuum tube set repair skills and your videos are some of my most important learning tools....Thanks for your posts and channel here...
I was on the edge of my seat the whole time.
Thank you so much for sharing!
I mean... that is just restauration/repair 101 - "when you take the thing apart, take notes / pictures on which thing goes where, so that you can put it back together afterwards"
Maybe he just wanted you to see how well he did with the recapping of the radio ^^
Back before digital cameras I would take pencil and paper and write lots of notes and special drawings of complex areas only the author could discern. Place screws and small parts removed in baby food jars with labels as to what went where. Been working on this kind of stuff since the late 60's, still do it for fun and still learning new things, that is why we are here watching Mr. Carlson.
I thought about it too. Make no mistakes with changing caps and resistors and fail with tubes? No way. Except this was done by different people.
i'm 28 and new to restoration.
Entirely due to your channel.
Super satisfying work to do during quarantine!
and an excuse to find new toys
though to be fair i found you through bigclive another great electronics creator!
Big Clive is a fantastic fella. CZcams could use more creators like him.
Amazing channel. I normally watch at night when there is nothing new on TV (that means, every day). Some time ago you said you would do a "Bio" video. Love to hear about you gaining all this knowledge. Very impressive. From the oldest tube thingy to the newest SMD designs, you seem to know it all.
Also, your lab is a treasure trove.
Thank you for your sharing your videos/knowledge with us!
It`s always a treat to see the Carlson Super Probe in operation!!!
Yep love these old radios. A tune-up .Wipe the Dust off and it will run for another hundred years. And in the cooler weather it'll help warm the house up a little.
Along with a batch of cookies, pot of homemade soup, popcorn, pizza fresh from the oven, or whatever you like on a cold day!
You are a great teacher my friend. Keep up with the great work!
Yes, please do a full alienment...great video, I was sad when the old vac tubes went their way. Nice recount on how the system worked on that radio. Thanks for the great videos!
I always feel like I've learned something here. Thanks for your exemplary programming.
I'm perplexed. Why did you go to the trouble of making such a nice video and not finish the alignment? Thanks for a fun project. It is appreciated.
The probe attached to your "Carlson Super Probe" looks just like the scope probe that came with the Heathkit 5MHz oscilloscope kit that I bought and assembled back in 1976. :-)
Yes, give it an alignment. It's very satisfying seeing these old radios work properly again.
A full alignment would be great. Yes, please!
I really enjoy your videos. You explain things very clearly and progress through the repair in a way that makes it easy to understand. Thanks for another terrific video!!
All the best,
Norm in Arizona
I love to watch your old radio videos. I dont have the chance to work on this old stuff. Please do an alignment video.
YES to the alignment procedure, please!!!!
As always, your videos are a treat
A proper alignment will make this work like it did when it was new. Thanks for showing these wonderful tubed equipment. It brings me back to my youth starting off in Electronics.
Always great content mr Carlson
I love your vids and when the alert popped up i was here in a flash (no pun intended). I really hope you'll tackle that AR88 soon, as i have two of those beasts that i want to service and align.
I spotted it as soon as you took the cover off! "That looks like an oscillator tube in the middle of the IF stages". Having worked on dozens of AA5 style radios as you mentioned in the video most follow the same arrangement v A7/K7/Q7/ Output. :)
Yes, it will be, nice to see this radio fully working again. So a BIG yes to a full alignment video :)
Thanks for this amazing video and your excellent description!
Great video! A supreme radio deserves a supreme alignment. I vote for a vid on the alignment.
Im glad to see you putting out a vid a week the last couple weeks. I'd like to see how you clean and polish some of those old crummy looking bakalite cases.
Beautiful radio that really deserves an alignment video. Thanks Mr Carlson.
Make it happen! You are like the Mr. Rogers of radio repair. You're the best at explaining things that make sense if though they are extremely complicated to us that enjoy watching you do your magic. Great Job!! Thanks.
Paul, your audio is absolutely amazing. It is as if you are sitting across the table from me. It is so realistic, and I have a tin ear, so it must be good.
Thanks Ian!
Great troubleshooting as always Paul. Nice looking radio! When I first saw it I noticed it looked a lot like the RCA Victor 56X3 but I see now there are a lot of differences. Thanks for sharing, now off the watch the alignment.
I really love your videos! Can’t wait for the tuning!
RCAs of those years usually had a split ground - a virtual ground for the circuitry coupled to the metal chassis with a .1uf coupling cap. Replace the coupling caps with a Y type for safety.
The exact radio I had in my room as a kid from about 9 to 16. (1960-1966) Love it!
Alignment, yes please.
Thank you for sharing your calm approach and dependable explanations.
Love to see you align it using the old time test equipment!
My radio. lab is nothing but vintage 1950’s and 60’s test equipment, except for my scope. The scope is an early 70’s Leader 50 Mhz model. I added peaking coils to the vertical amplifier to extend the overall scope response. For AM radio it does the job. In the 1950’s and 60’s all we had were 5 Mhz scopes.
Your knowledge is absolutely astounding,
Nice job. Loved it. Old receivers receive well.
Yes, I would really enjoy seeing an alignment done on this radio. Thank you Mr. Carlson
Love your videos. You made this look easy.
Please align it with vintage test equipment. Best Doc
Yes, I would like to see you finish the job. I screw drivered one of these once and have fond memories of listening to this little table top set. I also had to carefully repair its antenna that had deteriorated. That one is as clean looking as mine was. For a second there, I thought mine fell into your hands but I dont see my antenna repair. I wish I hadnt sold mine years ago.