ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
"It is fylly functional, it just has been stored away for some years now."
Oh, well...
blah-blah and photographs as needed
Orava:it just has been stored away for some years now
In salty water ??? .......
Yea, who knows, bottom plate was pretty rusty.
.
Brengen & Ophalen
I've just finished restoring a junkyard BM4000. Some changes are LED's at the ON indicator, and radicator (signal strength meter). Basically a top-down strip and rebuild. Rosewood panels stripped, sanded, steel-wooled, and MinWaxed.
Here's the interior - being that the MJ3001output NPN Darlington transistor is NLA, I found a suitable substitute as the 2N6284. Note the new Piher and Bourns Cermet potis, which replaced all the original burnt-out carbon potis.
And if you're really observant, you can spot a whole bunch of new Ohmite carbon-composition resistors - shiny and new, with a gold band denoting 5% tolerance - these replaced a significant number of the original carbon resistors, which were out-of-their-10% tolerance.
In the output stage, I use carbon-composition resistors, not metal-film, as carbon is much more robust in handling pulses.
Here's the pre-amp PCB - note the Vishay-Dale Metal-film resistors and Wima and Siemens film capacitors, especially selected for the audio path.
And replacing these 2 potis (4.5V tuning voltage adjust) on the underside of the BM, was the trickiest poti replacement I've ever done. These are soldered onto 2 flex-PCB's, but a couple of the pins must be soldered onto one flex-PCB only, without contacting the other flex-PCB!!!
MJ3001 here
Collecting Vintage B&O is not a hobby, its a lifestyle.
Very nice job on the 4000 Menahem! I'm preparing to do the same job on my 4000 in the coming months.
Beo4 'til I die!
Leslie: Bought a new load of RL and CX speakers that needs refurbishing. One of them is my first RL140's. These speakers are huge The woofers have foamrot and the cloths needs to be replaced. Gonna start a new thread soon with lots of pictures to show you guys how I'm gonna handle this beast
Bought a new load of RL and CX speakers that needs refurbishing. One of them is my first RL140's.
These speakers are huge The woofers have foamrot and the cloths needs to be replaced.
Gonna start a new thread soon with lots of pictures to show you guys how I'm gonna handle this beast
I made a couple of RL 140, wonderful speakers, Be careful when ordering surrounds, I used these perfect fit, the gap in the woofer is very small so be careful when gluing the surrounds and change the caps in the crossovers. I have here 4 pcs. woofers ready to go, with new surrounds if needed
Leslie: Not sure if I'm going to change the caps Soren, out of my knowledge to be honest. Just the refoaming and reclothing adn a bit of cleaning. The surrounds you mentioned on Ebay are quite cheap? I already ordered them via Goodhifi. I just finished to remove the gasket from the woofer. Bloody hell, what a mess.
Not sure if I'm going to change the caps Soren, out of my knowledge to be honest. Just the refoaming and reclothing adn a bit of cleaning. The surrounds you mentioned on Ebay are quite cheap? I already ordered them via Goodhifi. I just finished to remove the gasket from the woofer. Bloody hell, what a mess.
When I refoamed I got measurements from Good Hifi, totally wrong, check it well, Change caps is easy, just take out the crossovers, get a cap kit from Martin, go to someone who can solder and change the caps, it a 5 min. job, and its worth it. I made one speaker first and tested the one with new caps was much clearer sounding, the other one was like there was a thick blanket covering it.
Leslie:Not sure if I'm going to change the caps Soren, out of my knowledge to be honest. Just the refoaming and reclothing adn a bit of cleaning. The surrounds you mentioned on Ebay are quite cheap? I already ordered them via Goodhifi. I just finished to remove the gasket from the woofer. Bloody hell, what a mess.
Evan:Please change the caps in the RLs, you will be overjoyed with the sound of them.
There you go, change caps, 2 generations recommends
Søren Mexico: Evan:Please change the caps in the RLs, you will be overjoyed with the sound of them. There you go, change caps, 2 generations recommends
Sorry 3 generations, I have grand sons in his age
I'm working on formula how to make money (so I can convince Leslie to talk to me ) he he
No not really - got to many things on the plate, started on BC2200 (for which Martin provided belts and control lights and waiting for Axels's re-tipped cartridge/stylus bought from Soren Hamer for it to go further), BC 4000 need minor work soon and now I've picked up and tested BC8500 (will need attention later - especially if Leslie finds a glass panel for it)
and about to finish my beloved 3702-6244's when Martin's replacement woofer arrives (other ones has been taken apart and bits will be sold to needy people), while newly purchased American fridge freezer need to be brought inside and fitted (got to replace switches which now be behind it with IF ones - what an excuse to get my Beo 4 light to work - missus is up for it )
and lots more - no time to loose here
all the best
bob
Don't worry - be Happy
Leslie: That's where you've spend all your money
That's where you've spend all your money
What money - haven't got any
any luck finding the glass for BC8500 or near to decision on 4500? (got also someone from Sweden wanting one, shall I pass you the details?)
Sometime I have to pinch myself - how did it happened on virtually no budget to collect those things .....
cheers
Leslie: Soldering is my expertise Soren, did thousands of soldering PCB's on SMD level most of them using soldering paste using a heatgun, that's not the problem. Will check for the caps but I wonder if it's really necessary to replace, The sound is still amazing!
Soldering is my expertise Soren, did thousands of soldering PCB's on SMD level most of them using soldering paste using a heatgun, that's not the problem. Will check for the caps but I wonder if it's really necessary to replace, The sound is still amazing!
Hi Leslie,I restored one set of RL 140's last year and have a second set I need to do ... but no time right now. On that first pair, I did everything except a re-cap. I don't want to get in to that discussion but it wasn't because of any particular restoration philosophy that I didn't re-cap. I just didn't have caps handy and after I was done, the speakers sounded great so I moved on to my next project. I plan to redo the caps on the second pair when I get around to them so I can compare.For me, the biggest problem was putting on a new grill cloth. The RL 140 has a lot of surface area and I enlisted two people to help me glue the new grill cloth in place (a tacky type glue by the way). I am interested in watching that part of your restoration so please take some detailed step-by-step pics on that part. I would like to use a better method on my second set.
The other part I'm sure you are aware of is the tight tolerance on the woofers that you will have to refoam (2 per speaker). I didn't shim on that first pair and it worked out fine...but I will use shims on my second pair. Sorry to raise that debate again -sonavor
Great, that is the part I really want to learn. My strap areas and the Bang & Olufsen text came out okay in the end but it wasn't what I would call easy. I figured there must be a better technique. I'm looking forward to it.Thanks,sonavor
uh-oh...I knew I shouldn't have mentioned that topic
Well it'll be nice - I really was good this year Santa
I don't like owe anyone anything (just in case 3rd and final heart attack get to me sooner than the payment clears
guy from Sweden (contacted me through ebay wanted BG CD4500 or at least laser unit) was considering to buy my BG CD4500
can you email me quick reference link to production of your replica panels - I seem have difficulties to find it again?
Leslie: No money? You think I'm Santa? Glasspanel BC8500? No, I don't have any (yet). I think I already did some business with this "guy" from Sweden, in fact, it's on its way
No money? You think I'm Santa? Glasspanel BC8500? No, I don't have any (yet).
I think I already did some business with this "guy" from Sweden, in fact, it's on its way
New belts are in. Some things still don't work properly, but the music sounds great. Might be because I don't understand anything they're singing.
ablaumeise:New belts are in. Some things still don't work properly, but the music sounds great.
looks fantastic !
BeoNut since '75
cannot wait for the glue on frets to set to have good listen and put them back where they belong - a side of my BC3500!
Yuk!
Orava: "It is fylly functional, it just has been stored away for some years now." Oh, well...
Olly
..on a sunken wreck ?
I want one like that (Beocord), and I am absolutely convinced that I need it
ablaumeise: New belts are in. Some things still don't work properly, but the music sounds great. Might be because I don't understand anything they're singing.
How about that?
Yeah, I know, not B&O. ReVox is my second passion... This is a G36 all valve recorder, half a hundredweight on the scales. No Beocord will take 10.5 cm reels
I do have a Beocord 1500 deLuxe on its way...
Jacques