Schematic nap time. Grundig Satellit 3400 Pro restoration part 5.

Before starting on the all-important alignments, I wanted to understand exactly what would be needed. I decided to study the schematic more carefully to understand exactly what was being aligned, and why. Also, the antenna selector stage can be a little stranger so some more study was needed.
Then I had a mad idea. Why not subject my channel viewers to this punishment too? Why not indeed.
WARNING 1: This video is completely dedicated to the task of figuring out how German engineers from the 70's tackled a part of the design. So, if you're not into this, please skip this video.
DO NOT WATCH THIS while carrying out any activity requiring your full attention, as sleepiness is almost guaranteed. You have been warned.
WARNING 2: On review I did notice some errors on the LW and MW signal paths from the antenna circuit, but it is close enough for my purposes.

You can now support the channel:

TimeStamps
00:00 Schematic nap time. Grundig Satellit 3400 Pro restoration part 5.
00:10 Intro.
01:55 Schematic analysis.
30:39 Conclusionzzzzz

#tuberadios #antiqueradio #radiorestoration

______HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM_____
DIY TEST GEAR: The title says it all:

RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:

HowTo's: Various videos on some simple techniques and projects:

See also playlists on some other completed restoration projects.

PHILIPS BX750A:

TELEFUNKEN OPUS 2114:

SABA UW-175-Z 3D:

GRUNDIG 1070:

SCHAUB-LORENZ GOLDY 58 type 3020:

BUSH VHF64:

GRUNDIG 3060A:

TELEFUNKEN OPERETTE 8:

GRAETZ SUPER 171W:

LOEWE-OPTA MAGNET 3737W:

BRAUN ATELIER 3:

LOEWE-OPTA TRUXA STEREO 4741W:

GRAETZ COMEDIA 616:

SABA FREIBURG W2:

GRAETZ MUSICA 4R417:

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CAPACITOR LEAKAGE TESTER:

[SteveThinman]

Not boring at all! For a noob like me, it's actually very valuable! We all starts somewhere but without years long education and experience it's not that easy to understand what is going on on a schematic drawing. It's great if someone like you takes time to explain it. Thanks!

[sincerelyyours]

Understanding schematics has, for me, been the hardest part of learning electronics. It's always great when someone more learned goes through them for me once so I can take it to the next level and begin my repairs, mods or overhauls. Thanks for the detailed explanation of how this fascinating Grundig transistor receiver works.

[moshezaharia]

There is no way I would skip this video, it is a clever design and now it is obvious why it is a great radio!

[pdrwk]

Indeed not boring at all. I like to learn tot Read schematics this way.
I'm dure that I'm not the only one.
Keep up the good work.

[losencantes]

Hola

Vi el video completo

No me aburrió, sino al contrario me despertó las ideas de cosas que tenia poco claras y ahora entiendo mejor

Era necesario llegado a este punto,


Muchas gracias,

[psionl]

No snoozing for me. I love analyzing circuits like this.

[chrisclark]

Hi Manuel, good informative video. The time taken to give a detailed explanation of what's going on, makes it easier to understand and to follow your progress. It is also very interesting and educational to those of us that are genuinely interested in what you do and what you achieve. So at the end of the day, it's not boring at all. Again thoroughly enjoyed watching this. Cheers Chris.

[waynethompson]

Excellent video, well thought out, and helpful. I personally enjoy understanding schematics, and too often I find myself in a foggy mystery unable to make out what is going on. That said, there is something I am not understanding in your description of the signal paths. What I understood from your comments was that the switch positions did not alter unless you changed the switch. That you were tracing out the signal along the lines of where the contacts were already on the schematic. That you followed the existing contacts in some areas and not others was confusing to me. Then I watched the video in that area a few more times and it seems to have come clear to me. I think I understand it now. So, you see, your educational abilities come out in this process too! I really do appreciate your videos and as I said before, I love understanding schematics.

[geirendre]

10:40 The LW does the same (connect the tuning condencer with the input), you just forgot to draw it @6:20 the [L] 29h - 29i switch.
Very good and thorough walktrough. Reminds me of the RF classes we had back at school decades ago.
Except that out teacher did not manage to go trough it in 30 minutes, he used 2 weeks...

[greengrayradio]

Very good and thorough walk-through of the AM input and oscillator circuits! Yes, it is a daunting task in such a complex receiver. Your draw option to make blocks and coloured lines is great! The transistor T401 seems to be the RF amp for the lower bands, T402 is the mixer and T403 the oscillator for LW and MW. Many good receivers used turret tuners like this, the German KwEa and several others from WWII has nice turret tuners with a lot of ceramic coil formers and switches. Also, one of the best Norwegian AM receivers in my opinion made, Tandberg "Huldra 4" has a turret tuner! Later receivers has, to my knowledge, not these. Probably not considered cost effective..

[DavidTipton]

Haha... good one Manuel 😄 I also nodded off and woke up to a 'make your macramé' video, I've already made a pot hanger and just started on a hammock. To keep on theme I'm using dial cord 👍🙂

[retro_tech]

I'm still awake! Great deep dive, as usual.
I think you made a small mistake twice, once at 8:50 and once at 12:38 . When external antenna is selected, you will not get a signal from the rod antenna. The external antenna switch will open up the connection between point 17d and 17e, causing the rod to be taken out of the circuit.

[bobford]

Excellent video, so very interesting and informative, and very useful to watch before delving into the innards on a repair attempt... Cheers Bob...

[bobra]

I had my coffee before I watched. Should I ever get my hands on one of this, I know where to look and will be prepared.

[milantrcka]

Fascinating dive into 70's radio technology! For me the most intriguing item is the process of creating computer-ready schematic amenable to tracing. Could you describe the process from acquiring (undoubtedly) paper schematic, through scanning, and the process of following the lines. This must have taken a huge amount of time and effort, perhaps more than just resurrecting the radio. Amazing!

[DAVIDGREGORYKERR]

They should have used SO42P Double Balanced Mixer chips for the down conversion stage then a crystal filter using 10.7MHZ for FM/10.240MHZ for SW and 455KHZ for the LW/MW, and MC1350 chips for IF stages and a MC1496 for LSB/USB, a Diode Bridge for AM and a TDA7000 chip for FM demodulation would have simplified the whole unit.

[__Dude_]

Fair warning at the beginning, but I wasn't bored at all.
Quite interesting to follow your circuit walk-through!

[lydiavisser]

The device that is used to short peak voltages in the antenna circuit (like lighting strikes close by) is a neon bulb, without resistor. With the proper resistor it was commonly used in switches. Keep up the good work!

[howardhiggins]

Thanks for the heads up. I need to spend more time like this myself, but I'll have an easier time following along in the next segment.
Keep up the great work.

[robtitheridge]

Well did not fall asleep but had to re watch some parts a few times befor the information sank in.