Love these old 50's vintage German radios, I have an old Grundig that is still in good working order after some replacement caps and a tube. The sound quality is remarkably good for a table radio and it always draws attention when visitors hear and see it working. Nice repair job on the original switch, having it working as designed is a big plus. Thank you again for sharing these always interesting an informative videos.
A really good job! This is a terrfic view of how radios were so nice to listen to the music of tubes. We do not have that today.Super great fix by peter. Thanks for the fantastic tutorial.
Thank you so much, I adore tube radios and radio restoration. This is a wonderful radio too, love to find one like this for my collection. I also wanted to add, thank you for the wonderful troubleshooting tutorial and explanation of this radios schematic. It’s always so nice to hear a real expert explain circuitry as you always do. I always pick up little tips and tricks from you. Buddy
An interesting video. I myself love old Vacuum Tube radios. When you showed the inside from the back of the radio, I was amazed at how clean it was...ok, so there was a bit of dust, but no rusting, no pitting, it looked good! The warranty card brought a smile to my face. The date was my 3rd birthday!!! When you showed the underside of the radio, I was wondering what the green springs were....then I finally realized they were inductors. Your work on the power switch was amazing! Genuine talent there!
Excellent work Peter, restoring valve Radio's is one of my favourite jobs. There's nothing else like the sound that comes from a properly restored & aligned valve set. Merry Christmas buddy.
A nice radio Peter and a great brand (telefunken). I had a telefunken TV at home when I was a child. Very very nice German brand. Thx for sharing this video
Nice to see the inside of a classic German tube radio! I have restored many many American radios like this some even much older like 20s and 30s. We do have some export versions of these radios around here like Grundig etc... but they are not super common. Most seem to be more from 1960s rather than 1950s. Anyway glad to see this one back in working condition again! 73s and Merry Christmas to you and your family.
Great video, Peter! Glad you were able to repair that power switch. Persistence pays off. German engineers certainly designed great sounding radios with very few valves. Wishing you a Merry Christmas and a healthy, prosperous new year.
Thanks for showing some of the issues one can face when restoring old radios...a friend here just started working on a Hallicrafters SX-99 as his first restoration and I provided him with some safety caps and a chassis fuse holder so he can get started. Fortunately Hayseed had a re-cap kit for that radio and that gave him a good start. Merry Christmas Peter! 73 - Dino KL0S
Good to see you Dino and thanks for comment! Sounds like a very nice project on the SX-99 and good that the friend has you as mentor at his side....Merry Christmas and all the best 73
Hello, Peter. Enjoyed the video. I bought a Philco floor Model 37-650 about a month ago. I will be going through that chassis and replacing capacitors, resistors, and anything else that it might need. Got my work cut out for me! 73, and Happy New Year! Dan w4mnc
Hi Peter, Love your electronic detective stories. It’s very enjoyable following your thorough analysis. One thing I would really like to see is some of the mechanical hands-on techniques replacing a couple of the deeply buried capacitors in the forest of wiring. There is a lot we could learn from that. The improvisation and detail in reconstructing the volume-power switch is very useful.
Fabulous video. You have so much knowledge about radios old and new. Well done with the switch! A difficult repair but all too common with these old radios. I am very new to the repair of old valve and transistor radios but I find it very interesting and challenging to overcome the problems that they have. You have a fabulous workshop filled with wonderful equipment and I have only a cold shed and a voltmeter! But I enjoy every minute that I spend working with all kinds of radios. I look forward to seeing many more of your videos. Congratulations on your command of English as you are so easy to understand. Best wishes from The UK. Lynton G4XCQ.
Hi Peter, I was born in 1954 too, so be gentle with the old boy he's 64 years old and we old ones are for life ha, ha, I'm sure you will sort out his problems Merry Christmas. 73 Paul M0BSW
Nice video but much prefer more electronic teaching. Watching the switch get fixed was most of the video. Seeing you show how you tested the caps was great. Would love to see more on the Sencore cap tester if you could do a short video. Seeing how a good cap acts compared to an old one. Thanks for all you do. Great stuff. Keep the teaching coming
Thanks for feed back. Saying that have you seen my video #91 with all infos you looking for and at 21:49 you'll find more about leakage current. There are much more tutorial videos here on my channel you may find more content for you...
Hello, I wanted to mention to you about the ic-7000 driver problem. I had let the magic smoke out of my pd55015 driver while in the adjust mode, so I was looking for a replacement and found a pd55025 replacement of the same dimensions and rated 25watts with the same gain. So I will see how that works.
Hallo Peter, danke es war echt klasse. wie immer und es passt auch zur Weihnachtszeit. Ich wünsche Dir -Euch schöne ruhige besinnliche Tage und ein Leckerly an den schönen schwarzen. vy 73 DO5NET Peter
I have an old Philco radio from a Packard Special Eight which I need to go through once I get the right equipment going. I picked it up for free from the remainder of a close friend's auction lots. I just hope I won't have to source a matched pair of 7C5 output tubes for it (yes, this radio has push-pull output).
Hi Peter, the right project for the cold season ;-) I did not know that you are such a tube lover. The power switch, you got back well .... thumbs up. And you also use the repaired capacitor tester right away :-) Was that your intension before? I wish you and your family a Merry Christmas. 73 Bernd
Hi Bernd, yes right a nice project for the cold season.. Well yes I always was fascinated by tube design and I love the warm sound. No the repair of the Sencore had nothing to do with this project. Thanks for stepping in. Merry Christmas to you and yours 73
Hello Would not it have been better not to install the capacitor (antenna connector) ? Today it is unfortunately so that many disturbances on the power grid come, it did not exist earlier. What a coincidence that you are making a video about a tube radio, I bought an old one a few days ago and now I can put it into practice. Thanks for this and all your other videos Peter. I wish you a merry christmas and a happy new year. Many greetings Uli ( DK6DV )
You are right Uli there is much QRM on the air. The good think here on the radio is that you do not need to put the power line to your antenna input. You can decide what you need and therefore I think it is okay. Thanks for stepping in and Merry Christmas an a Happy new Year.
Really enjoyed the video! That one was sold when I was 3 years old...my birthday is on the 21 of April! So very happy that you got the power switch working again. Maybe I missed something, but I didn't see you do an alignment on this radio. Did you do one and I just didn't see it? If not, why not?
Hello and i wish some nice days and and good jump to 2019. In the 80s i had built in in two such similar radios simple 1:1 isolation-transformers. Worked well. For restoration 'looking' reasons i would had cracked the filter cap-dou and placed the new caps inside the can. Also the selenium rectifier i would had opened and replaced the selenium an copperplates against the diode. Looks better :-) Good explanation about the coupling cap at the nose of the end-tube. I say in German: Wenn der nicht sauber ist, kriegt die Röhre rote Backen und Fieber. :-) How about the other two frequencies? You only showed the UKW-area.
Thank you Alfred and Happy New Year. The design of a repair always depends on the requirement of the owner. So I have done the restaffing of old components with modern parts as well and the outcome looks quite original....HaHa yeah, the tube gets red cheeks..That is how it looks like. Again thanks for stopping by 73
About line tension on the chassis, Peter is right. However should be mentioned some of the radio's in that era, are designed withhout a mains transformer, then one side of the mains is really on the chassis. Also then there are different tubes used, socalled U-types, with all the filaments in series. As can be found in old bakelite Philips radio's . Here however, there is a normal mains transformer and E-series tubes. So, to my opinion the 'tension on the chassis' Peter shows in the end, is not usual, it also glows slightly, like leakage current, not full mains there. This brings me to the selenium rectifier. This rectifier was not replaced. It would be better, because it can cause current leakage to the chassis. Replace the rectifier by modern diodes and the leakage is gone.
Ger L. If you check at 1:02:17, you’ll see Peter shows the replacement of the selenium rectifier with a modern diode which he wired on a terminal strip mounted on top of the old disconnected rectifier.
The transformer is only for delivering the filament voltage and if you carefully watch the schematic as at 54:39 you'll see that the radio circuity is directly connected to mains. So it is for sure full mains and not a kind of leakage or ghost voltage it is rather more exactly the same as on the Philips radio what you are referring to with the exaption that the Philips do not have a transformer for the filament so they have to use the U tubes..
Indeed Peter, I see it. The anode voltage here is directlty rectified from the 220V mains. The transformer itself is an autotrafo. I missed this and I assumed the trafo was a 'normal" transformer with separated windings for anode and filament voltages. This all is not quite 'Telefunken - like' , as we are used to more sophisticated power supply designs by this brand. Probably a matter of model policy, production costs or the lack of raw materials like copper at that time point. A justly warning: there can be mains phase on the chassis, even in a radio with E type tubes.
Always nice to see a classic brought back to life and ready to be used for several more decades. I have several Telefunken radios. Several of them need to be restored. Makes me want to dig out one of them and resurrect it. On vintage radios like this when I'm installing modern X/Y rated capacitors I use the X1/Y2 rated blue ceramic types. They are usually a 1/4 the size or smaller and have 2 to 4 times the voltage rating of the originals. Here's a example of the ones I buy from DigiKey. www.digikey.com/products/en?keywords=399-9538-1-ND%09
Good to see you remember me on this types of Y capacitors almost forgotten..have to fill my stock. Thanks Mike! Hope to see you restoring a Telefunken soon.
LOL!!! Check out at 16:25. Look at the side of the transformer, that poor .025uF cap blew is ass out all over the side of the TX!!! Talk about "leaky!"
Hi TRX Lab, vielen Dank für das ausführliche Video! Ich habe eine Frage zu dem von dir verwendetetn "Loctite". Ist dies einfach ein Kleber um die Schrauben zu festigen, sodass diese sich nicht so einfach lösen? Und bekommt man dieses Loctite einfach wieder ab beim eventuell aufschrauben? Und noch eine letzte Frage, welches "Loctite" verwendest du? Beste Grüße
We have exactly the same old generator. I found one out of order some month ago it took month to repair it. These German radio are probably the best ones ever, compared to the European or American antique radios. I’ve a Phillips stero valve radio the wiring and mechanical parts are an incredible mess.
Hallo Peter, vielen Dank für deine tollen Videos! Es macht Spaß dich bei der Fehlersuche zu begleiten. Ich habe hier ein Problem mit einem Yaesu FTM-100D VHF/UHF Gerät. Die Lautstärke des Lautsprechers steigt selbstständig an, ohne den Regler zu berühren. Am Kopfhöreranschluss verhält es sich genau so. Hattest du schon mal ein solchen Phänomen an einem Gerät? 73 ,Marco DO6NM
Hallo Marco, vielen Dank für Deine Rückmeldung. Zu deiner FTM-100 kann ich mich im Augenblick nicht erinnern ob ich diese Problem schon mal auf dem Tisch hatte. Leider lässt sich das Problem auch schwierig eingrenzen, da es überall liegen kann ggf. sogar in der AGC Schaltung..73
@@TRXLab Here in the US the line voltage was 110/220 in the past but it crept up over the years and now it's 120/240. My line voltage right now is 122.8.
Why do the Europeans have a plug that can be reversed, it makes no sense, here in Australia even our two pin plugs can only go into the socket one way and all outlets are wired to the same standard.
