A Restoration Adventure - [ GE Radio Receiver Restoration Series ]
HTML-код
- Опубликовано: 1 окт 2024
- Welcome to this radio receiver restoration series! In this episode we will look at the RF Chassis in this GE CX371, see what needs to stay and what needs to go, we will go over the schematic together, and check out their overall design. This is Part 4, to see the links for earlier videos, 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
Part 1 of this GE CX371 receiver restoration: • 1957 Barn Find Radio R...
Part 2 of this GE CX371 receiver restoration: • Grand Receiver Restora...
Part 3 of this GE CX371 receiver restoration: • Radio Receiver Restora...
#learnelectronics #restorationvideos #restoration
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
Thanks again
Je m’abonne
I like seeing radios like this one with separate RF, Mixer, Osc and two IF stages. This GE is going to be a very good DXing tube receiver. Can hardly wait to hear it perform.
That Turret band selector is really a wonderful piece of engineering. Gosh, love the mechlectrical approach. Yes that word is of my own making, won't work in scrabble. Loving the series and really loving the engineering expertise of yesteryear.
I love how this is going so far! Excellent job as usual Mr.Carlson!! your restorations are the best i have seen!😁
Thank you very much!
I really wish they rethink their products and the right to service as they did in the past
I can imagine modern electronics, EEVBlog forum types laughing at this sort of thing and dismissing it as "old school stuff, there's a reason things aren't built like this anymore". Nonsense - give me discrete point-to-point connections over a silly green board with a bunch of surface-mount sprinkles and a big black square in the middle!
Works OK for a large-chassis radio… but I wouldn’t want to try to build an iPhone that way..l
@@darkwinter6028 Sure, an iPhone is a great device and requires that kind of technology, but the trade off is that you’re using an impenetrable block of metal and glass that you can’t do jack to fix yourself unless you shell out big bucks for iFixIt kits and the new jigs that Apple sends people sometimes. Technology has gone from user-friendly to user-hostile. I’d rather larger devices like radios, bench gear, servicing/test equipment be more transparently made even if you’d sacrifice the goofy touch-screens, redundant functionality and menus buried within menus.
What a generalisation
To be honest, I prefer to simply see them as circuits in different timelines and I don't dismiss any of them. Of course, you wouldn't start building tube radios or what not, from scratch using old components since there are a lot of easier ways to do that now, using modern ones that are more maintainable and cost effective too. To restore and maintain old electronics equipment, now that's something I totally agree with. 🙂
@@clue0001 of course, components develop and become more efficient over time - but something about seeing transistors, or even 74 series chips, with traces going to resistors and caps and all, is so much more cognitively satisfying to me than a black blob with 50 lines coming out of it going everywhere and the rest of the board looks like someone spilled a pepper shaker
Can Radio be an addiction? Depends on the frequency 😊
LOL... including tools to service a radio with hundreds of volts B+, yet we can't be trusted to change a 4.2v battery because we might die. 🙄👍️
That turret reminds me of some of the early black and white TV sets
Beautifully engineered by extremely skilled people
Thanks
3:50 Dang, they even supplied an Allen wrench for the setscrews.
What a different world it was!
@@MrCarlsonsLab Plus, it's clearly a top of the line receiver... spared no expense :-)
I'm a guitar guy. And I never use black beauties, bumble bee or paper in oil capacitors in my guitars. I prefer mylar.
perfect distraction for a friday night!!!
I have never seen GE tube radio built this well. Pleasent suprise, looks to be built better than most mid range Hallicrafters. In same class wih Saba, Philips and Mende concert receivers. I have more than 100 tube radios, lots of Hallicrafters, some GE and RCA but mostly big Euro multiple speaker units. When that GE was new you could get good used car for its value. Year old family car. SABA with autotune was really expensive, hand built with price tag like volkswagen. Band switching on this one was probably done by sharing same drum with early TV sets, ony different discrete components on those strips as frequency differs.
It really is unfortunate that Easily serviceable = Expensive to produce now
What a beautiful cost is no object radio! Shango006 is working on a 1948 Philco TV with a similar turret tuner, which apparently had field modifiable stations so each click on the tuner could be set to the correct stations for the location.
8:50 My dad's old Hallicrafters S-107 had a bunch of these in it - ended up replacing them all. I should go back and see how leaky they are, if I can find where I stuck them.
About the only industry that still encourages end user repairs, is the motorcycle manufacturers. A lot of motorcycles still come with tool bags for roadside repairs.
I will not be surprised if the ancient relatives of the designers of this radio built the Egyptian pyramids.
This is absolutely fascinating. I love this old GE restoration. I found a capacitor in my old Philco 60 that was so bad, I could actually take an ohms reading on it with my old Fluke 27. Come to think of it, I wonder if that capacitor tester could be built point to point. I'll check it out on Patreon. Westinghouse wants a snack, and I need a break anyway.
Hi Chad. Check out the community section on Patreon, Peter just built one using a wire wrap technique, it looks great. It's a top post over there right now.
Edit: Now Tim has made the project, he's the current top post, It looks just like the box you see on my bench, except he engraved his box. Looks fantastic!
I see that you're not going to be needing the gym after all the lifting and spinning of that chassis!
Great Video Paul! I am such a procrastinator. I need to build that capacitor testor.
Great that you enable a deep look into that technology. Thank you These days you got value for money. This times have gone! --> Dire Straits: Money for nothing and the chicks for free......
Well I am glad to be here this quick. Thanks again! I want to see the insides of this receiver so bad lol
devil's been busy my auto darkening welding helmet makes crackling noises
Yeah, great show, but all it takes is a shower and 3 days of drying.
This video makes me miss the 60s to 80s. The days were quality and long life was the goal, schematics came with equipment, and of course the Heathkit days.
Myself included Michelle!
Scotty Kilmer uses an automatic transmission seal restorer for rejuvenating and preserving rubber bushings, etc. Might be worth looking into for grommets, etc on the electronic equipment.
15:30
That would be awesome, I want to make a tube device but don’t know which tubes to use.
I've been bulk watching , so I have seen you test the Tiny Cheif's for leakage in earlier videos, but it was a while ago.
I always enjoy you proving what you say is true though. If people still don't believe you when you present positive proof of what happens, then it is on their head :).
Thanks for another wonderful restore. Your channel was the first "tube radio" restoration channel I ever subscribed to and is still my favourite due to the way you teach us all soemthing as you go along
Thanks for your kind feedback Brendan!
The last time I saw a tool like that was with a HP DL server where they included a small torx head tool to screw and unscrew down the various parts of the server. The last one I saw was about 10 years ago. Back before HP bought this server line from Compaq, Compaq used to regularly provide such tools attached to every server in a similar manner as to this radio.
I haven’t seen one on their more recent models.
I was going to say the same. Some of the HP Gen 8 DL380p servers included the tool, but it seems not all. So HP probably discontinued this practice during the Gen8's run, or sometime between 2012 and 2015.
can’t wait to watch this one! it’s been fun watching you work on this guy
Your audio is excellent! The outside noise is hardly noticeable. I only heard a truck in the beginning and not a second time. The video quality is so good that I can almost count the grains of dust on the chassis. I'm also VERY impressed with GE quality from that era. I think it went largely unnoticed back in the day.
Mr Carlsson your GE shortwave receiver is cool your utube videos are awesome
I wanted to let you know I love your videos, and I love your enthusiasm towards what you do. These videos expose me to equipment that I would never have a chance to see otherwise, and I really appreciate all the effort you put into it.
Thanks for your kind feedback Rene!
For some reason I was unsubscribed against my will and without my knowledge, I'm back here now, I hope someone can see this and I'm not hidden , let me know please
I see your post Grant.
The schematic shows that the IF Transformers are indeed 455 kHz. The dual-conversion IF sections would use either 8 or 10 MHz (if HF-oriented or an FM receiver with 10.7 MHz) as the first IF frequency, or would use 262 kHz as the second IF (if AM or Broadcast-oriented). It's so much easier to align with a single IF frequency. Such a nice RF section design. I'm shocked to see that the "Tiny Chief" capacitors are really "tiny grief". I have also been amazed at the leakiness of the Black Beauty caps, as we used to leave them in place in the 1970s. But then, time and testing methods do march on. It's so good that you can teach an old dog new tricks...
Glad to be there for you Richard. Thanks for your kind comment too!
Thanks for doing this one first, Paul, I loved it as soon as I saw it in the line-up, and I love it even more now. Let me know when you need my address to ship it over to the UK for me! When I was ten in 1962 I swapped my friend a bike for one of those old radios. I thought it was a great deal, and I'm sure he must have thought I was crazy as he happily rode off on my bike! But I loved it, kept it in my bedroom and would stay up most of the night listening to short wave stations. That was the start of my love affair with radio. Now at sixty nine years old the love is still going strong. Thanks again, Paul, every video you make takes me back across my lifetime of radio.
A thing of beuty and a joy for ever! All the manufacturing of the '50s/'60s was so good because there was no imperative of making things to last only a few years and then be thrown away. And now... with the blazing fast technological progress, planned obsolescence and quickly changing fads, the mainstream electronics is way shittier than it used to be.
"Tiny Grief" was a good one!
Thinking of a T-shirt design that goes like "Leaky Caps Destroy Amps" :)
Really incredible and well thought out design and engineering. I sure wish things were built with that level of quality and thought now days. Thank you for sharing your vast knowledge with all of us.
You're very welcome Feliciana!
Sir, I am in early twenties and I love your videos. I am learning a lot from you. Excellent job.👍
great video Mr. Carlson, I'm learning a lot. looking forward to the next installment.
The world before bean counters.
The dial is the most interesting part of the design. Pretty cool.
Though I am a pre med students..... But my high school physics book "Concepts of physics" by "HC verma" taught me so much
Of electronics and you taught me how to approach a equipments for service that i buy old equipments at cheap prices from hospitals and university and repair it and give it to primary check up centers in rural area ....
You are my idol professor sir
I am from India 🇮🇳I would like to meet you soon as I finish my studies
May God keep you safe and sound
Coming along nicely Paul. 👍
My gosh, stumbled onto your run through the GE receiver this morning. I've been away from electronics for many years but watched you go through to the point where you tested the tubes! A Heathkit tube tester! I made a few Heathkits but never knew they made testers. Now there is something for the ages, the spell checker showed my misteak(pho-pho) that there apparently is no word Heathkit. So now this crusty old (just short of 83) can teach this 2020's laptop a thing or two, well, one anyway. My life and retired life has been filled with many other things but a little came back as I watched you go through it. Maybe time will permit me to 'attend" one of your classes later but for now I must run to the coffee clutch of old guys kicking around the worlds problems. Later, JimM
The physics, electrical characteristics and concepts do not change. Embrace the past as a foundation to the future. Journey, question, experiment and explore! Enjoy 😊 ⚡️
Excelente. Tengo ese ,mismo Radio CX-371 pero no tengo la placa de la Fuente de Alimentacion. Si quieres te lo vendo. Tiene todas esas valvulas.
Paul, I like this slightly less structured (is that the word?) video style. Also, it lets your sense of humor and personality shine through a bit more. Thanks.
Even a hardcore Hallicrafter's or Hammarlund fan would be forced to agree that this is a far superior design. (wooden cabinet: designed for 'home use'; the 'business side' has longevity written all over it)
I bought a Framework laptop recently, and they include a tool to help you get it apart for repair or replacement. It wasn't the best choice from a price\specification standpoint but it's good to know they they aren't laughing at me, like some other manufacturers would.
Well, I learned something new. I had one of those special white capacitors fail in my Hallicrafters SX100. I replaced it with a "regular" capacitor. I haven't noticed any problem. I may have gotten lucky.
I am not sure if you were referring to the same thing, but my restoration guy called the "green eye" tube on my Magnavox console, a "Magic Eye". It's a cool feature.
4:39 if this radio was made recently it would comes with proprietary screw thats impossible to find the screwdriver or tools for, you want to align it ? send it to the manufacturer, something looks slightly off even tho its how it is from the factory, warranty void, you opened it ? its out of warranty
Ah, The good Old days! And those times WERE BETTER ----- Tube testers in Drug store, So many really good , Well built radios - I'm still into Radio, but these days, it's Didgital - I currently have 3 different " Tecsun radios. 2 with SSB. And they do work very well, but I have fond memories of the Old Tube Radios- I also , at one time got into HAM , Lots of fun ! I started out with an old Johnson Valiant I got for $40.00 long ago- I'm 70 yrs old now, but I still am into the hobby, I'm usually up all night reading and working on my projects- Anyway, Love your vids !
Enjoy your videos. Love to see radios designed by Engineers instead of today equipment designed by accountants,
Yeah Paul, I bet a lot of people would try to convince someone that crackling noises on classic expensive audio equipment are actually a good thing....all that 'natural organic sound' nonsense. Do they even understand what leaking means in this context? I bet you could write an entire book about audio mythology and technical misunderstandings that are floating around everywhere. A big thanks for this video series. I really really enjoy them. All the best for you, your loved ones and all the friends of the channel.
There's a TON of valuable knowledge in ur brain. Hope you can get it to us.
The interconnection between the unit and the turret has got to be a nightmare. Will you be able to show us it??
If GE had gone with the vacuum tubes designed in 1957 which have a H+ of 12V and a B+ of 12V then there wouldn't be many problems and use an output stage with EL34s to provide the wanted volume.
I thought AVC meant Automatic Volume Control.
It can mean that as well, it all depends on the manufacturer. It's kind of like the "OL" that's displayed on your DMM, it seems there are many different word combinations for that too.
Mr Carlson just want to say Ive been following you and your videos for a long time and your work is extraordinary very precise I I've learned a lot from your videos these last months almost a year I've been following you, and I've even seen some of your old videos and the way you explain everything and very thorough very professional keep up the good work and I'm learning a lot. Also I was wondering if there's any way to contact you or other websites or if you have any other way to be contacted because I'm looking for tubes I have a sonar amplifier the BR- 21 and I would like to find the original sonar tubes the (6JB6A) or the (6JB6) also a (12AT07) just wondering if you have an email or something where I can communicate with you other than RUclips thank you and keep up the good work...
If I may, could I make a suggestion about your audio? I know you use that lovely tube Mic which is nice and clear, however, it really brings out the sibilant characteristics in your voice. You could add a multiband compressor or de-esser in your post production, it would really tame that sibilance right down but retain the high quality audio. (Audio engineer in me here). Its not the very top end, but rather around the 3khz-7khz area...
Love the videos, anything RF has my undivided attention, thank you so much for the time taken to produce some very high quality content.
Best restore work Mr Carlson sir very nice condition GE model radio and thanks for sharing this I enjoyed your video thank you Mr Carlson sir.
I have a question for you. I am working on building a power supply that will be used for a small computer, however I've got a problem that I am hoping that maybe you might know the answer to or guide me to where I can find the answer. This power supply calls for an electrolytic capacitor, used as a ripple filter, 20,000uF at 20 vdc. What I can't figure outr is, should it be polarized or non polarized ? I can't find this info anywhere.
Excellent video Mr Carlson. BTW...My son gave me an old Telequipment Serviscope S51A, that he obtained from a friend that's father was in the TV repair business back in the day, for fathers day present. Can you please provide me a link to a schematic diagram. The scope works but the left side of the signal trace is elevated above the right side on the screen, I'll have to manually rotate the CRT to fix that Thanks
That turret makes me think of the gold fingers on an old Tek scope (albeit considerably larger than the Tek cylinder).
Hell ya. I wonder why GE spent the money to do this. ! Out their is a story about the why of this raido. Thanks for the find. Best Regards Jack
Please make longer videos' love them all need more!! barely ate half bag of funyuns and it was over GEE
I was going to disagree with your "bygone era" statement about tools included but I look up and realise I'm still living in that era and do make tools or include them. Last week I was explaining my Gem war bonds records to someone and they looked at me like I was offering them last week's fish.
It's not that things were built better "back in the day" , it's that you happen to be servicing a top of the line product. There were plenty of crappy cheap built things back in the day as well but they don't survive and no one wants to keep them. There's great products built today that will survive 100 years and your great great grandson will be servicing that, not the cheap walmart stuff and he'll be complaining about how things were built better "back in the day".
This is gonna be an awesome reciever when completed and your work is top shelf (as always) am following this series closely and am also looking forward to the Collins project and the Racal I thought I saw as well...your expert narration and explanations are perfectly done to teach what you're doing
Always love your vids and cant wait to retire from the road so I can do your course...keep em coming
Jeff de WD8JM
If Mr. Rogers ever got into radio repair and restoration, Mr. Carlson lab would be it. Very educational, as well very pleasant to watch. Thank you for keeping great radios alive, as well giving them new lease on life. I enjoy watching your videos.
Thanks for your kind comment!
i agree with you. nowadays they dont include tools necessary to repair your electronical things anymore, things have changed. because modern age consumer electronic barely needs any repair anyway. and when it does need any repair, your average user cant even do anything about it now can they? for example an television. what on earth would your average joe do if the manufacturer includes a philip screwdriver? i mean, what problems occur on tv nowadays that needs the user to disassemble the tv itself? dead panel? blown up smd component? yeah what would a average person do with a philip screwdriver? replace the panel? replace a smd? nope. the average user dont even have the skill required to do it. you dont need to adjust silly pots hidden inside it anymore in modern tv. and most importantly, people who are able to replace a panel and/or smd (repairperson, "superuser", etc) are very likely to already have a complete set of screwdriver anyway. they wont need any extra set of screwdriver. and even if they do, the cost of them buying screwdrivers themselves are cheaper compared to if everybody pays for a included screwdriver. like, it's not even a free screwdriver is it? you're still paying for it. suppose only 10% of users know how to fix a tv. if you're including a screwdriver with all of the tv, 90% of the users will not even use it. waste of money and waste of screwdriver. most of them will end up useless because not used by the majority of the user because the majority of the user dont have any idea how to fix it. another example a topic famous for louis, a macbook. imagine apple including a pentalobe screwdriver in the box. now the fact is that the majority of macbook user dont even have any idea about basic electrical things. for example, changing battery. it is a wear thing that degrades over time and will need to get changed. we all know that apple love to use a super strong superglue to secure the battery. but still, a average user wont even dare to crack open a macbook and even touch the logic board, let alone unglueing the superglued battery with how flamable those batteries are when they get punctured. most of those pentalobe screwdriver will end up unused as well. another example to do a upgrade. suppose magic happen and there is a upgradable 2022 model macbook released. most of the users are still dont have any ideas about things to upgrade anyway. example upgrade ram, what speed or CL or form factor, etc do they need? there is so much details that a average user dont even know about. and in the end the one who upgrade it will be someone 5 years from now who bought it from the initial owner, who already know things about ram and most probably already have a complete set of screwdriver anyway. it is mostly a waste of money and material for screwdriver production to include those tools in modern age consumer electronics. because nowadays consumer electronics dont have potentiometer hiding inside that needs to be adjusted once a month anymore like in the good old days.
Suggestion: add "part 4" to the title, this wasn't obvious that's what this was! Cool stuff, love your channel!
Very impressed by the design of this part of the receiver. They spared no expense to get it to perform flawlessly.
I love that they used a Fahnestock clip to hold the Allen wrench in place! Black beauties were created by the devil.
No words have ever rung truer!
Very akin to what the Russian manufacturer VEF did on the VEGA Multi-Band radio
I was waiting for you to say "evil pure and simple from the 8th dimension!" About the black beauties 🤣
I really enjoyed this. I love restoring old things like this, it makes you appreciate good quality stuff!
I was wondering if you've done any videos on the N.E.A.R. Device frim the old civil defense?
This just makes me want to see how complicated the innerds are in the R-390A.
Could you mix and match all the 6Es?? With this unit all the different kinds your talking about ?
I am really enjoying this series of videos. I can't wait until the next video comes out.
Mr Carlson, I don't really understand radio, but is that receiver a super hetrodyne, and how does the detection work with the mixer heptode?
I am fascinated by the turret tuners… I’ve never seen one in person but I’ve always thought they looked awesome.
A friend of mine has recommended me this tutorial. And i couldn't' be more happier
nice radio loving the vids i bet it was not cheep when it was new and it got look after well to
wow,, That is a design that I have not seen before,, Happy to be along on this adventure,,, :-)
Example of a rf like tv tuner . the first I've seen. for band switching. TO day its'd diode., relay . now its the designers need.
watching your great video 📹 and having a cup of coffee ☕ what can be better than that 💯
You have to admit, on that dial, some engineer earned his pay!
That is one very, very nice piece of gear. I have never seen a turret style like that. That is just awesome. This one is going to receive like a dream when electrically restored!
creative radio design and very cool description 😎 thank you
It's is great magic to repair this great Antique radio set super job 👍
REALLY enjoying this resto, Paul!!!
Like the dial, shame we can't get good reproduction dial prints
A great looking receiver as always a very detailed and quality repair.♥️
Hello
I'm from Portugal...!!!
I taught at an electronic school, a few years ago, and seeing and listening to your videos ... It's like returning to the "Laser School" seats .... !!!
Thank you so much for this extraordinary experience ....!
Thanks for your kind comment!
Did any of these old radios have a feature on them known as "automatic volume control ' ?
I was expecting the turret assembly to contain a separate set of coils for each waveband, but it turns out to be just a complicated multi-pole switch, selecting different fixed coils; or combinations thereof?
You are correct, and they are tuned with compression type variable capacitors.
Thank you so very much for sharing your unbelievable expertise and experience - I really enjoy your work and first class teaching. Thank you again
You are so welcome!