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I am looking for a CD4 decoder for Beogram 3400.
Beogram 3400 belongs to the Beomaster 3400 system as the player for 4 ch. records, but the decoder was delivered as an option.
I hope to find the decoder for Beogram 3400
or
A Beogram 3400 with the decoder build in.
Please contact me if you own a decoder or a Beogram 3400 with a decoder.
/Frede
Frede, I must have one lying around. How can I recognize the decoder option from the outside?
Brengen & Ophalen
Leslie,
You can't see from the outside if a Beogram 3400 have a decoder build in.
You have to open the Beogram 3400. If you do so, you will find the decoder as a big PCB and also you will see an extra small mains transformer.
I hope you have on
You can tell it the CD4 decoder is fitted to a 3400 as the small black plastic plug on the top plate is replaced by a red LED.
Peter
Interested to know if it is a similar module to that found in a gram 6000?
Olly
Frede, be patient, the weather is terrible over here, rainy and cold. Have to go to my other "closet" which is about 10km from where I live. Hope to do it this week!
Step1: Interested to know if it is a similar module to that found in a gram 6000?
Having had both, it is a totally different shape so they are not interchangeable.
Leslie, no problem - we have the same kind of rainy wether here. I am in no hurry - I just hope you "find something" when you have the time.
Sorry Frede, found one with but unfortanetely no decoder. I wonder why you read 4ch on top of the alum. plate and there is no board in it! I suppose you can't use the record player? It's in a good condition and you can have it for free if you want it!
Leslie: Sorry Frede, found one with but unfortanetely no decoder. I wonder why you read 4ch on top of the alum. plate and there is no board in it! I suppose you can't use the record player? It's in a good condition and you can have it for free if you want it!
I have had a Beogram 4002 type 5523 with the "4ch"-display between the speed selectors on the top plate
Vinyl records, cassettes, open reel, valve amplifiers and film photography.
The 4CH is next to the black plug which is replaced by the red LED that lights up when it detects the carrier frequency.
All later 4002 and 4004 decks have the 4ch display - but it does not do anything unless the CD4 board is fitted.
The customer could use a Beogram 6000, which is far more plentiful and much more attractive. I believe that many 3400s were used in just this way. With Frede's anodising contacts, he could have a black one to match the BM3400 - even better! A Beogram 4034!
Sorry for the late reply, Leslie.
Thank you very much for going to your other location and try to help me finding a Beogram 3400 with the decoder and for the offer of geting the Beogram 3400. I will wait and see what I hopefully find, which means I will be back if I need to use your very kind offer.
However I hope "some day" to find the decoder or the decoder documentation.
I'm afraid, I cannot help much either but it does exist. It was an optional kit and it's a fairly complicated circuit:
Martin
There is one for sale in a Danish advertisement site right now.
http://www.guloggratis.dk/radio-tv/bang-olufsen/radio/annonce/15072182-bo-radio-hoejtalere-pladespiller?imagepos=3#images
Good find, - but it doesn't have the decoder.
How can you tell Martin? Same situation like mine, says 4ch but no decoder inside! But therefor I had to open it!
The tiny dot next to the 4CH lettering is replaced with a LED if I remember correctly.
I think a more easy way to see if the Beogram 3400 is prepared with the decoder could be the cable (sound cable) which will be a lot more thick for 4ch versions. This is clearly seen on the photo Martin precented.
Of course if you see an LED this is also a good indicater for 4ch. decoder present.
Hi Frede,
Here is a picture of an actual BG3400 with the CD4 decoder installed, which I worked on about 9 years ago. It is VERY different to the CD4 decoder PCB in the BG6000. Not compatible at all.
I will keep an eye out on one for you.
Menahem
Menahem,
Thanks very much for this input. I picture is really the best way to show - the Beogram 3400 with a build in decoder excists.
And also your photo shows the BG6000 decoder cannot fit in.
I really hope "one day" to find this decoder or a Beogram 3400 with the decoder. It a kind of passion now to find this rare Beogram. The Beomaster 3400 with the Beogogram 3400 - - - a 4ch system.
The very annoying thing is that I did have one of these but took it to Bellac. I never fitted it to the 3400 so it was in the original packaging. I told Steve he could sell it when Bellac was being sold so I imagine he did.
At least we know it surely exists and someone really have seen one :)
I have the original blue Service Manual, and the CD4 is not mentioned or described in there.
I sold mine 10 years ago to a customer in California, and from all the curiosity about it now, it appears that I should have held onto it!
Thanks for checking the manual for us. I don't think the Bg 3400 is extremely rare, but seems like any with the CD4 decoder fitted or the optional CD4 PCB itself is a very-very rare one...