Vintage Products

Re: Christmas came early for me this year

Blackrix — Fri, 10 Feb 2012 11:51:33 GMT

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!

Re: Christmas came early for me this year

Steffen — Thu, 09 Feb 2012 19:37:53 GMT

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...

Re: Christmas came early for me this year

the_o_master — Thu, 09 Feb 2012 17:53:00 GMT

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....

Re: Christmas came early for me this year

Blackrix — Thu, 09 Feb 2012 13:21:44 GMT

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.....

Re: Christmas came early for me this year

tournedos — Thu, 09 Feb 2012 12:03:40 GMT

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

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.

Re: Christmas came early for me this year

the_o_master — Thu, 09 Feb 2012 10:17:16 GMT

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

Re: Christmas came early for me this year

richtoy — Sun, 01 Nov 2009 14:42:04 GMT

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...

Re: Christmas came early for me this year

tournedos — Sun, 01 Nov 2009 12:30:52 GMT

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

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

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.

Re: Christmas came early for me this year

richtoy — Sun, 01 Nov 2009 11:59:05 GMT

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

Re: Christmas came early for me this year

richtoy — Sun, 01 Nov 2009 07:54:44 GMT

Thanks Rudy

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

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

Richard

Re: Christmas came early for me this year

RUDYV — Sun, 01 Nov 2009 05:53:26 GMT

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.

Re: Christmas came early for me this year

ipaul — Sat, 31 Oct 2009 17:18:53 GMT

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 ?? :)

Re: Christmas came early for me this year

richtoy — Sat, 31 Oct 2009 16:58:15 GMT

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

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....

Re: Christmas came early for me this year

burantek — Fri, 30 Oct 2009 22:32:05 GMT

I HAVE TO HAVE ONE!

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

Re: Christmas came early for me this year

elephant — Fri, 30 Oct 2009 21:19:57 GMT

richtoy:

Beocomparator Series 02

The part numbers are 8802033 & 8802029.

Used for blind tests of loudspeakers and/or amps ?