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Latest post 02-10-2012 11:51 AM by Blackrix. 18 replies.
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  • 10-30-2009 4:14 PM

    • richtoy
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    Christmas came early for me this year

    Look what I picked up today.

    It is just what I need and I did not even know it existed LaughingLaughing

    It allows 5 speaker sources to be switched to any 1 of 8 sets of speakers.

    Furthermore, it appears that in switching the speaker source you implicitly switch a single line input to one of 5 outputs.

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

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  • 10-30-2009 4:23 PM In reply to

    Re: Christmas came early for me this year

    That is funky! Laughing

    So, apparently you can connect five amplifiers, and the mixing console kind of thingy allows you the level the levels, so to speak?

    The typography suggests that it would be from the early '70s...

    -mika

  • 10-30-2009 6:19 PM In reply to

    • richtoy
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    Re: Christmas came early for me this year

    Well sort of.

    There are eight sliders which suggest that they allow the output to the speakers to be balanced and that is what the person that sold it to me suggested they do.

    What I can tell you is that it has an offical B&O sticker on the back:

    Beocomparator Series 02

    The part numbers are 8802033 & 8802029.

    And it is number 0729 which suggest there are a few more out there waiting to be discovered.

    Before connecting any of my Beomasters I will take the back off and try to work out how it all works.

    Richard

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

  • 10-30-2009 7:55 PM In reply to

    Re: Christmas came early for me this year

    WTF?

    President, Beomaster 8000 Appreciation Society

  • 10-30-2009 9:19 PM In reply to

    Re: Christmas came early for me this year

    richtoy:

    Beocomparator Series 02

    The part numbers are 8802033 & 8802029.

    Used for blind tests of loudspeakers and/or amps ?

    First B&O (1976) was a Beogram 1500 ... latest (2011) change has been to couple the BL11 with the BL6Ks *sounds superb*

  • 10-30-2009 10:32 PM In reply to

    Re: Christmas came early for me this year

    I HAVE TO HAVE ONE!

    Great find! Do tell us more as you dig into it!

    • B&o bottle opener
  • 10-31-2009 4:58 PM In reply to

    • richtoy
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    Re: Christmas came early for me this year

    Well today I had the boxes in bits to clean and work out how they work.  I have photos but whenever I try to upload the server appears to freeze Angry

    Anyway, there are 26 relays (13 in each box), the line in is simultaneously connected to all 5 line out via an attenuator/amplifier that is controlled by the 8 sliders.  That means the a slider will only control the output volume at a given speaker if the source of the selected amplifier is being fed by one of the line-out sockets.

    It was nice to fine a little sealed brown package inside one of the boxes with 2 spare fuses and the circuit diagram.

    The problem now is working out which 5 pieces of my collection to connect...

    1) BM8000

    2) BM4400

    3) BM3400

    4) ?

    5) ?

    The speaker choice is not so difficult:

    1) Pentas

    2) S60s on trumpet stands

    the other 6 are spare....

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

  • 10-31-2009 5:18 PM In reply to

    Re: Christmas came early for me this year

    Hi, in case you didn't know: this is a dealer demo box, to listen to different amps (BM's) onto different speakers.

    I used to have one but traded it for some other old B&O toy :).

    As far as i know, you basically connect the BM's with the TAPE in/out (din) to the box and the speaker outputs.

    There should be more of those around because about every dealer should have had one in the 70's but than again some B&O things seem to just dissapear....or pop up for that matter.

    Similar thing seems to happen now to B&O  measuring gear: there should be some around still, never ever saw it offered all these years and now it seems to pop up....maybe with the crisis peole clean their attics ?? :)

  • 11-01-2009 5:53 AM In reply to

    • RUDYV
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    Re: Christmas came early for me this year

    Congratulations Richard with your very nice chrtismas present.

    Yep, I saw it too, but obviously you were a litle faster.

    This is a graet accessory to connect and switch between your Beomasters and speakers.

     I can remember when I saw one for the first time.

    I guess it was some 30 years ago in a B&O shop in Turnhout.

    I have been searching for a long time ...... and you don't see these very often.

     

     

     

     

  • 11-01-2009 7:54 AM In reply to

    • richtoy
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    Re: Christmas came early for me this year

    Thanks Rudy Big Smile

    As soon as I saw it I emailed and telephoned with the asking price.  It was only 50km away too...

    I spent another 50 euro yesterday on din plugs and cable and that is just to connect the 5 amplifiers and the 5 line-outs Laughing

    Once today's Grand Prix is over I think I will have a bit of soldering to do Whistle

    Richard

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

  • 11-01-2009 11:59 AM In reply to

    • richtoy
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    Re: Christmas came early for me this year

    As promised, here are the pictures of the internals and scans of the circuit diagram.  There is black tube shaped device in the second picture (Phillips RPY13).

    You can read about it here http://www.tubecollector.org/rpy13.htm

    Enjoy

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

  • 11-01-2009 12:30 PM In reply to

    Re: Christmas came early for me this year

    That is one confusing circuit! Apparently the RPY13 is there just to avoid using dual slider potentiometers? Confused

    Or, just to make do with a single buffer stage in the Beomaster selector... dubious savings if they only ever built one per dealer! Laughing

    EDIT: Now I get it! It's of course because the control unit can be a long distance from the switching box. This way the level adjustment only carries a DC signal, not the actual audio back & forth.

    -mika

  • 11-01-2009 2:42 PM In reply to

    • richtoy
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    Re: Christmas came early for me this year

    You are absolutely right Mika

    What you don't see from the pictures is the 10m of cable that connect the two units together and you would not want line level signals travelling 20m...

    Some of my B&O: BV3/32, MX7000, MX5500, LX5500, MX4000, BM8000, BM6000, Overture, BL8000, BM6000 Quad, BM4400, BM3400, BG-CDX, BM3000, BM1001, BM1200, BM1600, BM1700, BM1500, BM1400, BM2400, BM2300, BM4500, BM4000, BVM70, BVS45-2, BVS60, BC7700, BM2200, BM1900, BG8002, BM1202, BVPenta, BVP45

  • 02-09-2012 10:17 AM In reply to

    Re: Christmas came early for me this year

    I am not sure if it is the right place but the only one entry I found about Beocomparator is this.

    So I found this device a short while ago (Beocomparator-3) and I would know what can it be?

    Obviously it enables different sources to be switched to different sets of speakers. Unfortunately the second unit is missing :-(

    Does anybothy have a picture of this device/set?

    I would be grateful for any information.

    Thx

     


  • 02-09-2012 12:03 PM In reply to

    Re: Christmas came early for me this year

    It's beautiful! And I don't have a freaking clue what it is! Laughing

    Well yes, it's obviously the remote control panel for something similar to what we saw earlier in the thread... Sources on the top row, speakers on the bottom, perhaps? The looks with the piano keys à la the quad system would date this one to the late 70s I guess.

    -mika

  • 02-09-2012 1:21 PM In reply to

    Re: Christmas came early for me this year

    This is the controll unit for BeoComperator III. It should be connected to a connectionunit on which the BeoMasters and BeoVox speakers can be connected. It is for comparing speakers. With BeoComperator III also small lights could be connected which could be placed on top of the speakers so you could see to which speakers you were listening. And I have a complete set.....Big Smile

  • 02-09-2012 5:53 PM In reply to

    Re: Christmas came early for me this year

    Hey Blackrix!

    Can you post any fotos here?

    If would be interesting to see the second connection unit, please...

    Do you know how many pieces were made?

    Dr.Google cann't find anything about Beocomparator-3. It is very rare I think...

    I think it will be challenge to find the other part of it....

     

  • 02-09-2012 7:37 PM In reply to

    Re: Christmas came early for me this year

    This Beocomparator-3 looks like something that have been used in the B&O factory only (in their testing rooms?).

    Did they ever have this in any shops..? I've never seen it - and I've been in a few shops all over Denmark through the years...Hmm

  • 02-10-2012 11:51 AM In reply to

    Re: Christmas came early for me this year

    It was used in stores, but that is also the reason why there are not that many around, and not every dealer had one. But I know there are more!

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