Need help to Identify Blauplunkt Automobile Radio - UK Vintage Radio Repair and Restoration Discussion Forum

Fred4man · 16th Jul 2021, 4:05 pm

I have a Blauplunkt radio from a 1967 car. Radio may be older or newer who knows? Someone scraped off the ID tag. I wonder why.

I need to ID it adequately to order schematics to start repair.

It appears to be a Frankfurt on Kolon of unknown date.
4-Band with band indicator above the buttons
5-button
Separate amplifier section.
Mono
Speaker plugs (3) are in V pattern.
Voltage & Ground switching by Bakelite strips inserted into the Amp section.
2 DIN connectors on back of tuner section, 1 with cap containing a jumper
Station Knob appears to be a push inwards 7 Appears to have a small electric motor behind the tuning knob for auto station tuning?
Inside tuner there is a yellow handle to remove a circuit board

Photos are attached

paulsherwin · 16th Jul 2021, 4:11 pm

67 sounds about right. It's a radio for the European market (it has LW, and the FM only goes up to 104MHz). This would have been an expensive option when new.

Sorry, but I can't provide a model number, not being a Blaupunkt expert.

Herald1360 · 16th Jul 2021, 5:56 pm

Maybe this one?

https://www.radiomuseum.org/r/blaupunkt_koeln_2.html

The rear view looks pretty much identical.

Leon Crampin · 17th Jul 2021, 6:33 pm

Your set looks like a Koln (should be 2 dots over the "o") and is probably series Z. The Blaupunkt car radios were named after German cities.

The series letter is important as the sets differed quite a bit as the designs progressed. The detail would have been on a paper label on the RF chassis, by the DIN connectors.

For info: series X = 66/67; Y = 67/68; Z = 68/69; A = 69/70 etc.

The circuits are available online, but change the selenium bias diode (X 650 on the circuit) for the output stage to either 2 Si diodes in series, or 1 Si diode + 1 Schottky diode and reset the quiescent current as per the instructions. Destructive runaway can occur if the Se diode is left in circuit.

If you make a Forum search, there is some data on this amplifier unit.

Leon.

Fred4man · 18th Jul 2021, 3:45 am

When on the radiomuseum.org site and I click on the download button it wants to download some software on to the computer.

This looks like someone is trying to hack my computer. Is this normal and is this site safe?

Fred

Fred4man · 18th Jul 2021, 5:07 am

Leon,

Yes it would have been nice if someone had not removed the label.

I have not been able to find anything helpful from a search on this site. I was only able to get something about how to use the Aux input DIN receptacle on an Italian site.

The only Koln schematics I was able to locate were with he single DIN receptacle. And on that site the model was listed as Koln with no model number listed. On eBay sites I have seen photos of the model for sale but no mention or photo is given of the model # or the serial # so I'm only 1/2 way identifying this critter.

As I mentioned earlier the radiomuseum.org site which I landed on looked like a hackers trap, not sure if it was the correct site?

Fred

Station X · 18th Jul 2021, 9:43 am

Quote:

Originally Posted by Fred4man

When on the radiomuseum.org site and I click on the download button it wants to download some software on to the computer.

This looks like someone is trying to hack my computer. Is this normal and is this site safe?

Fred

Can you be more specific please. What software?

When obtaining service info from RM as a quest you'll be asked for your email address etc. so the info can be emailed to you.

Quote:

Originally Posted by Fred4man

As I mentioned earlier the radiomuseum.org site which I landed on looked like a hackers trap, not sure if it was the correct site?

Fred

If you click the link in post #3 that'll take you to the correct site. They're definitely not hackers.

ocean-boy 204 · 23rd Jul 2021, 11:56 pm

Koeln schematics you find also here:

https://elektrotanya.com/showresult?...a=All&kat2=All

ocean-boy

Julesomega · 24th Jul 2021, 9:27 am

How unusually complicated! The 'Selectomat' automatic tuning looks to be the forerunner of the ubiquitous 'search' tuning of all modern car radios. I presume a search was initiated by a press on the tuning knob

16th Jul 2021, 4:05 pm	#1
Fred4man Diode Join Date: Jul 2021 Location: Houston, Texas, USA. Posts: 3	Need help to Identify Blauplunkt Automobile Radio I have a Blauplunkt radio from a 1967 car. Radio may be older or newer who knows? Someone scraped off the ID tag. I wonder why. I need to ID it adequately to order schematics to start repair. It appears to be a Frankfurt on Kolon of unknown date. 4-Band with band indicator above the buttons 5-button Separate amplifier section. Mono Speaker plugs (3) are in V pattern. Voltage & Ground switching by Bakelite strips inserted into the Amp section. 2 DIN connectors on back of tuner section, 1 with cap containing a jumper Station Knob appears to be a push inwards 7 Appears to have a small electric motor behind the tuning knob for auto station tuning? Inside tuner there is a yellow handle to remove a circuit board Photos are attached Attached Thumbnails

16th Jul 2021, 4:11 pm	#2
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,944	Re: Need help to Identify Blauplunkt Automobile Radio 67 sounds about right. It's a radio for the European market (it has LW, and the FM only goes up to 104MHz). This would have been an expensive option when new. Sorry, but I can't provide a model number, not being a Blaupunkt expert.

17th Jul 2021, 6:33 pm	#4
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,870	Re: Need help to Identify Blauplunkt Automobile Radio Your set looks like a Koln (should be 2 dots over the "o") and is probably series Z. The Blaupunkt car radios were named after German cities. The series letter is important as the sets differed quite a bit as the designs progressed. The detail would have been on a paper label on the RF chassis, by the DIN connectors. For info: series X = 66/67; Y = 67/68; Z = 68/69; A = 69/70 etc. The circuits are available online, but change the selenium bias diode (X 650 on the circuit) for the output stage to either 2 Si diodes in series, or 1 Si diode + 1 Schottky diode and reset the quiescent current as per the instructions. Destructive runaway can occur if the Se diode is left in circuit. If you make a Forum search, there is some data on this amplifier unit. Leon.

18th Jul 2021, 3:45 am	#5
Fred4man Diode Join Date: Jul 2021 Location: Houston, Texas, USA. Posts: 3	Re: Need help to Identify Blauplunkt Automobile Radio When on the radiomuseum.org site and I click on the download button it wants to download some software on to the computer. This looks like someone is trying to hack my computer. Is this normal and is this site safe? Fred

18th Jul 2021, 5:07 am	#6
Fred4man Diode Join Date: Jul 2021 Location: Houston, Texas, USA. Posts: 3	Re: Need help to Identify Blauplunkt Automobile Radio Leon, Yes it would have been nice if someone had not removed the label. I have not been able to find anything helpful from a search on this site. I was only able to get something about how to use the Aux input DIN receptacle on an Italian site. The only Koln schematics I was able to locate were with he single DIN receptacle. And on that site the model was listed as Koln with no model number listed. On eBay sites I have seen photos of the model for sale but no mention or photo is given of the model # or the serial # so I'm only 1/2 way identifying this critter. As I mentioned earlier the radiomuseum.org site which I landed on looked like a hackers trap, not sure if it was the correct site? Fred

16th Jul 2021, 5:56 pm	#3
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: Need help to Identify Blauplunkt Automobile Radio Maybe this one? https://www.radiomuseum.org/r/blaupunkt_koeln_2.html The rear view looks pretty much identical. __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

23rd Jul 2021, 11:56 pm	#8
ocean-boy 204 Diode Join Date: Nov 2014 Location: Hamburg, Germany Posts: 7	Re: Need help to Identify Blauplunkt Automobile Radio Koeln schematics you find also here: https://elektrotanya.com/showresult?...a=All&kat2=All ocean-boy

24th Jul 2021, 9:27 am	#9
Julesomega Nonode Join Date: Dec 2012 Location: Stockport, Greater Manchester, UK. Posts: 2,106	Re: Need help to Identify Blauplunkt Automobile Radio How unusually complicated! The 'Selectomat' automatic tuning looks to be the forerunner of the ubiquitous 'search' tuning of all modern car radios. I presume a search was initiated by a press on the tuning knob __________________ - Julian It's good here Last edited by Julesomega; 24th Jul 2021 at 9:40 am.