I've missed tube radios, and just love these small ones. Grundig 2140 restoration - part 1.
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- เผยแพร่เมื่อ 22 พ.ย. 2024
- Tube radio restorations have always been my favourites. This Grundig 2140 is from around 1962, the start of the end of the tube radio era, so it has a layout and tube set that was really quite well established by that time. The special characteristic of this one is that it is one of the smallish ones, which I particularly like. They are compact and work very well, so it should be fun to work on and get it back up to peak performance.
Hope you enjoy the series.
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Welcome back to tube radio, Winter is good for warm tube radio~
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These radios you listen all day in the background and you never get tired of their sound ,,, better acoustics better dynamic range on the audio section ,, great video thank you for posting
My pleasure
May well be that the output is 8 ohms. Modern stereos are 4 ohms. Our old tube tele many many years ago had 16ohm speakers and I remember that trying to speak over it was difficult, whereas the modern 4ohm speakers you can easily speak/have a conversation with someone, Or if you're listening to it and someone talks, it over powers the speakers, if you know what I mean.
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You are a brave man!
Fun project though. Something about these old radios with their mechanicals and tubes glowing in the middle of the night.
Listening to The Shadow.....
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Hey Mr Chopstick 😉 I'm looking forward to this resto
Got to get to the Chinese restaurant soon. Running out of tools 😊
Ahhh... that's better... enormous heat, massive voltages, parts that blow up and the constant threat of death by electrocution, there's nothing like a tube radio. Thanks Manuel 👍😀
Pleasure Dave. Nothing like some shock hazard to get our energy up 😊
I started repairing radios and televisions while living in Gibraltar back in the late 60s and these featured valves. I had access to a valve tester, which was great fun. Nowadays, I don't get to work on valve equipment, which is ashame. So watching you working on these valve radios brings back good memories.
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Superb
Thanks
I refurbished a Grundig 2140U for my daughter couple years back and it sounds great. Not that complex to work on.
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This radio comes from an era of Grundig where they had already undertaken quite a bit of cost cutting in their manufacturing process compared with earlier years. The glass dials were now replaced with plexiglass ones. The once heavy painted chassis was replaced with a much flimsier nickel plated one with plating that corroded away rather quickly. The switch assembly was cheapened with more plastic parts And pot metal rot on parts like flywheels and clutches began showing up. I'm just completing a restoration of a model 3035 from around 1957. Basically the same circuit except for the eye tube. But there's no comparison in the build quality. The 3035 is built like a tank. By the mid 60's the quality dropped even further, exemplified by the absolute piece of junk that was the model 4070.
I agree. Some of the other grundigs I’ve done are in fact on a different level quality-wise.
Not a wreck by any means but with enough faults to make it interesting and satisfying to restore.
Just the way I like it 😊
Such beauties :) they deserve the tlc.
They sure do
Looks great. Will look even better in a few videos
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Nice video and radio! The FM/UKW scale in Mhz will be illuminated by de dial lamp and is located just under the channel numbers!
You’re absolutely correct. Didn’t see that until now.
Nice Manuel,somethings are new , red sealing compound on screws & rivets (the fm box), hoping to see soon the distorsion cause : caps,resistor ( EL 34's working point..??).
Let's see what you discover😃😃.
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This could have been a podcast........
looking forward to this
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Thanks for the look! Enjoyed watching.
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Wow, you're a better man than me for attempting to power that radio up with all those blown caps. Looked like every paper cap in the thing was pulled inside out. Looks like it's all there, though, so I'm sure that after you've given it your magic touch it'll look and work like new again. Also, you mentioned you have a mask that shields you from alcohol fumes. I've been looking for something like that ever since I cleaned a computer keyboard at JFK Airport with 99% IPA for a customer and left the place higher than the airplanes circling overhead. That was 40 years ago. Been leery of the stuff ever since.
I don’t get too fancy: I use a simple Covid mask 😊 hopefully I won’t fly too high 😊
Manuel, great to see you with a tube radio again! I'm sure you plan on aligning this later on. I'd love to see you do the alignment with a simple basic signal generator and a VTVM, the kind of tools a hobbyist may have. Not sure of your other followers but that would be a help to me. Just a thought. Thanks for considering it.
Good idea. I’ll probably do that.
Distortion - EL84 grid coupling cap, AM AGC cap and ofcourse power supply. EL84 has good getter .Check voltage on its grid and cathode. Grid should be zero volts dc
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I really enjoy your tube radio videos! And I agree, these smaller ones have a charm to them, don't they? :) Looking forward to following along, as always! 😃
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Tube radios 📻 have a nice sound
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Really looking forward to follow along again here. I'm curious to see if you'll succeed getting the stains out of the grill cloth. My Grundig 5195 has the same cloth and nearly identical stains. I didn't manage to get them out.
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Looking good, another great find. At 5:20 did you say the “dial cord seems to be in very good condition” when looking at the AC cord? Maybe I didn’t hear correctly. Looking forward to the rest of the videos.
I probably did. The dial cord is definitely NOT in great condition 😊
Hey, I have a question when it comes to this radio, I recently bought a Model 2140 U radio, and it looks exactly like this one, but I didn’t come with a cord to plug it in, do you know what the cord is called or if there’s any adapters that you know of, thank you.
You can simply change the plug to suite your mains system.
Love Tube radio's and test equipment also:👍👍👍 Common people, *SUBSCRIBE,* he knows what he's doing; unlike Jim L.
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Thanks Manuel nice vedio
the tube tester courses are over or you will continue them.
The tube tester is working as is, but I’m sure I’ll be making changes and add-one as I go along.
21:13 Interesting. I've got two Grundigs from the same model year but they don't seem to have plastic dials. Looks like Grundig must have introduced them starting with cheapest models
True
Do the little mystic maestro speakers cost alot?
Hi Manuel. That is a great little radio and you have got off to a very promising start. I may be wrong (and I probably am), but I seem to remember that low down behind the unusual FM scale there is another Dial lamp for lighting the bottom part of the scale. Also it seems a little strange that one tube was covered in white power, and the one next to it was nice and clear. Again great stuff as usual, and looking forward to seeing the next episode. Cheers Chris.
It may just be that the output tube gets so much hotter that it "bakes" the dirt into more like an ash. I've seen the same on many radios I've restored.
@@johnstone7697 Hi John. I think that you are right, as I can't think of any other explanation, as you say the output tubes do run very hot.
I actually regretted cleaning the white powder off with my bare fingers, because it could be anything. Anyway, I’m feeling fine, so it wasn’t anything too dangerous 😊
There is in fact a scale for FM that I didn’t see at first.
I am curious as to whether this model has the pot metal clutch, and if it is still intact or broken, and how you will fix it if it is. I have a Majestic that is very similar, it had a broken clutch, I had set it aside for awhile due to that and a few other issues. It looks like this model doesn't offer the electrostatic tweeters.
It does indeed have a clutch. We’ll see how it is as we go along.
Nice video!
BTW, do you know where to get one of those white volume pot knobs for that era Grundigs?
Search ebay. They sometimes come up for sale.
@@electronicsoldandnew Thanks. Yes. However I have tried to find those locally at flea markets etc. but for some reason those brown versions of knobs seem to be much easier to find than those white ones, especially in mint condition.
hi fm gear fixed how did you make it common
18:00
This radio may be a quickie you might have revert to the old filming method or Tony's solder chats style. I'm curious to see what evil might lurk under the FM's shield.
Should be fun
How is called that German magazine? ELV?
Yes
I have same model but not work properly
My dial tube is gone too please help
Mmmmmm Manuel Dr. Caldeira
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@@electronicsoldandnew are you actually a Dr.? Aren't you?
Nope. Only an engineer 😊
@@electronicsoldandnew ok we're colleagues then :)
Where did you get the impression that I was a Dr ?
Nothing more disappointing than a radio restoration series where the radio works just fine when first turned on.
For the viewer, the diagnosis of the various problems is at least half the allure.
I agree. For the restorer too 😊