Grundig 5050W/3D c1955 - UK Vintage Radio Repair and Restoration Discussion Forum

skodajag · 28th Mar 2018, 4:51 pm

I've recently acquired one of these sets and am wondering if anyone else out there has one too. I have several questions about it, specifically the vhf band which is divided between UKW1 and UKW2 (via the panel keys, not the dial, which is the same for both). I'm wondering if it has something to do with alternative aerials - internal and external - since the 4035 has that facility. But the aerial connections on this set are also less than self evident. Any thoughts?

Freya · 28th Mar 2018, 5:15 pm

I have one 5050w 3d and one 5040w 3d, the parts of the schematics below are easier to interpret from the 5040 (left) as its been marked more. I must admit this has never crossed my mind until now.

ms660 · 28th Mar 2018, 5:36 pm

Quote:

Originally Posted by skodajag

I've recently acquired one of these sets and am wondering if anyone else out there has one too. I have several questions about it, specifically the vhf band which is divided between UKW1 and UKW2 (via the panel keys, not the dial, which is the same for both). I'm wondering if it has something to do with alternative aerials - internal and external - since the 4035 has that facility. But the aerial connections on this set are also less than self evident. Any thoughts?

Two mechanical memories for UKW so far as I can make out.

Lawrence.

skodajag · 28th Mar 2018, 6:19 pm

You mean like a pre-set? The wave change is motor driven, but it has a facility I've not yet fully understood whereby changing the waveband takes you back to the previous tuned station.

ms660 · 28th Mar 2018, 6:39 pm

So far as I can make out the mechanism remembers the last station tuned, I don't know anymore about that but there's an article in the link below about the mechanism but it's in German, maybe someone who knows the language can translate:

http://85.144.192.2/nvhr/Grundig_4040W3D_rht.pdf

There's also a user manual in the same language for the 5050 W3D that can be found in this link:

https://www.vintageshifi.com/reperto.../Grundig-2.php

Not sure if the above links are aloud on the forum, if not then you'll have to Google.

Lawrence.

ms660 · 28th Mar 2018, 8:02 pm

Just come across this which shows manual tuning of a station then followed by motor tuning to the same spot after changing between UK1/UK2:

https://www.youtube.com/watch?v=84R1fs8_5GY

And another one:

https://www.youtube.com/watch?v=0qHOexyhvo8

Lawrence.

skodajag · 29th Mar 2018, 9:09 am

Thankyou Lawrence. That makes it clear. The motor tuning is primarily wave change only, but with this facility to also automatically retune to the last selected station. I've posted separately on motor tuning in post war sets.

ms660 · 29th Mar 2018, 3:30 pm

No problem.

The schematic and the switchery shown in the schematic can be a bit of a maize, don't know if your familiar with the switch tables etc shown on the schematic but if not then all the switch wiper positions are shown in the off position in both the switch tables shown, the switch contact numbers given in the circuit comprise of two numbers separated by a comma or a slash, those separated by a comma are the ones shown in the "untere platte" switch table and those separated by a slash are those shown in the "ober platte" switch table, the first number corresponds to the row number in the switch tables and the second number corresponds to the column number.

When a function is selected the switch wipers for that column in the "unter platte" table all move upwards by one position, the switch wipers for that same column in the "ober platte" table all move downwards one position, the switch wipers pertaining to a,b,c,d,e & f in the "ober platte" table all move to the right by one position when the ferrite rod antenna is switched into the circuit.

So far as I can gather, unusually an additive mixer is used for AM.

The FM IF path might look a bit to and fro but it's fairly conventional except to say that the AM mixer isn't used for FM IF amplification, instead, another valve is used which also serves as the RF amp for AM.

Lawrence.

skodajag · 29th Mar 2018, 3:55 pm

Thanks again Lawrence. I still can't get the hang of the practice, let alone the theory. Looking at the YouTube video the two vhf buttons act as programme selectors - I had thought each selected the last tuned position for that button. But not so, at least on this set. Or rather, sometimes one of them works dutifully, while the other doesn't. There seems to a be a trick I'm missing....

skodajag · 29th Mar 2018, 3:58 pm

Quote:

Originally Posted by Freya

I have one 5050w 3d and one 5040w 3d, the parts of the schematics below are easier to interpret from the 5040 (left) as its been marked more. I must admit this has never crossed my mind until now.

Do your two vhf buttons on the 5050 work as presets?

28th Mar 2018, 4:51 pm	#1
skodajag Pentode Join Date: Mar 2003 Location: Heathfield, East Sussex, UK, Posts: 227	Grundig 5050W/3D c1955 I've recently acquired one of these sets and am wondering if anyone else out there has one too. I have several questions about it, specifically the vhf band which is divided between UKW1 and UKW2 (via the panel keys, not the dial, which is the same for both). I'm wondering if it has something to do with alternative aerials - internal and external - since the 4035 has that facility. But the aerial connections on this set are also less than self evident. Any thoughts? __________________ Keep Calm and Carry On Restoring

28th Mar 2018, 5:15 pm	#2
Freya Octode Join Date: Jan 2009 Location: Falmouth, Cornwall, UK. Posts: 1,989	Re: Grundig 5050W/3D c1955 I have one 5050w 3d and one 5040w 3d, the parts of the schematics below are easier to interpret from the 5040 (left) as its been marked more. I must admit this has never crossed my mind until now. Attached Thumbnails __________________ Stephen _________"It`s only an old telly" ___

28th Mar 2018, 6:19 pm	#4
skodajag Pentode Join Date: Mar 2003 Location: Heathfield, East Sussex, UK, Posts: 227	Re: Grundig 5050W/3D c1955 You mean like a pre-set? The wave change is motor driven, but it has a facility I've not yet fully understood whereby changing the waveband takes you back to the previous tuned station. __________________ Keep Calm and Carry On Restoring

28th Mar 2018, 6:39 pm	#5
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Grundig 5050W/3D c1955 So far as I can make out the mechanism remembers the last station tuned, I don't know anymore about that but there's an article in the link below about the mechanism but it's in German, maybe someone who knows the language can translate: http://85.144.192.2/nvhr/Grundig_4040W3D_rht.pdf There's also a user manual in the same language for the 5050 W3D that can be found in this link: https://www.vintageshifi.com/reperto.../Grundig-2.php Not sure if the above links are aloud on the forum, if not then you'll have to Google. Lawrence.

28th Mar 2018, 8:02 pm	#6
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Grundig 5050W/3D c1955 Just come across this which shows manual tuning of a station then followed by motor tuning to the same spot after changing between UK1/UK2: https://www.youtube.com/watch?v=84R1fs8_5GY And another one: https://www.youtube.com/watch?v=0qHOexyhvo8 Lawrence. Last edited by ms660; 28th Mar 2018 at 8:27 pm.

29th Mar 2018, 9:09 am	#7
skodajag Pentode Join Date: Mar 2003 Location: Heathfield, East Sussex, UK, Posts: 227	Re: Grundig 5050W/3D c1955 Thankyou Lawrence. That makes it clear. The motor tuning is primarily wave change only, but with this facility to also automatically retune to the last selected station. I've posted separately on motor tuning in post war sets. __________________ Keep Calm and Carry On Restoring

29th Mar 2018, 3:30 pm	#8
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Grundig 5050W/3D c1955 No problem. The schematic and the switchery shown in the schematic can be a bit of a maize, don't know if your familiar with the switch tables etc shown on the schematic but if not then all the switch wiper positions are shown in the off position in both the switch tables shown, the switch contact numbers given in the circuit comprise of two numbers separated by a comma or a slash, those separated by a comma are the ones shown in the "untere platte" switch table and those separated by a slash are those shown in the "ober platte" switch table, the first number corresponds to the row number in the switch tables and the second number corresponds to the column number. When a function is selected the switch wipers for that column in the "unter platte" table all move upwards by one position, the switch wipers for that same column in the "ober platte" table all move downwards one position, the switch wipers pertaining to a,b,c,d,e & f in the "ober platte" table all move to the right by one position when the ferrite rod antenna is switched into the circuit. So far as I can gather, unusually an additive mixer is used for AM. The FM IF path might look a bit to and fro but it's fairly conventional except to say that the AM mixer isn't used for FM IF amplification, instead, another valve is used which also serves as the RF amp for AM. Lawrence.

29th Mar 2018, 3:55 pm	#9
skodajag Pentode Join Date: Mar 2003 Location: Heathfield, East Sussex, UK, Posts: 227	Re: Grundig 5050W/3D c1955 Thanks again Lawrence. I still can't get the hang of the practice, let alone the theory. Looking at the YouTube video the two vhf buttons act as programme selectors - I had thought each selected the last tuned position for that button. But not so, at least on this set. Or rather, sometimes one of them works dutifully, while the other doesn't. There seems to a be a trick I'm missing.... __________________ Keep Calm and Carry On Restoring