What are you working on now?

272 replies
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Motorman
Offline
Motorman
Bronze
Posted September 25, 2023 at 15:56 GMT
#1659029
I'm just restoring an Beogram CD 7000 which is optical in a very good condition.
Only the CD Tray had some ugly oxidation marks in the shiny middle area.
Since I also restore cars, I have access to a sandblasting cabin. Since the traces of oxidation cannot be polished away (it was turned shiny at the time), I sandblasted the area. I am quite satisfied with the result. It's not original, but it almost looks like it ;-)
Before:



After:


 

 
Tignum
Online
Tignum
Gold
Posted September 25, 2023 at 16:48 GMT
#1659030
looks very good!

Location: Netherlands

My B&O Icons:

Beoplay-A1.png Beoplay-A1.png
Beoplay-H95.png Beoplay-H95.png
Beoplay-P6.png Beoplay-P6.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beoremote-One.png Beoremote-One.png
Beosound-5.png Beosound-5.png
Beovision-10.png Beovision-10.png
Motorman
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Motorman
Bronze
Posted September 25, 2023 at 17:45 GMT
#1659031
AU
Offline
auric
Bronze
Posted October 2, 2023 at 10:30 GMT
#1659149
Hello Evan:

Yes the charging base can be converted to run on 120. The primary of the transformer actually has two windings. For 24o, the windings are placed in series which is how yours is wired.

To make it run on 120, you will need to unsolder the primary lugs from the transformer. T Lift them off and fold them over onto the other side of the PCB so that it bypasses the traces which connect the windings in series. Then you can connect the windings in parallel.

You can also cut the traces on the PCB, but I prefer modifications that are non-destructive and can be reversed.

Derek

PS: I'm in SF as well!

 
Evan
Offline
Evan
Gold
Posted October 7, 2023 at 18:26 GMT
#1659215
Hey Derek - Thanks for the info! No worries, there won't be any traces cut here.

I'll add another photo of the bottom, it seems like there is a trace that can be broken intentionally underneath (there is a pair of joined solder pads). This path runs under the transformer from what I remember, however I could be mistaken. I'm on vacation right now but will add a photo and try to identify the spot on the schematic when I return home.

Glad to read there are other BeoWorld members in SF!

 

 

Location: San Francisco

I'm an automotive audio and acoustic engineer. I design loudspeakers and full sound systems for new automobiles. I also dabble with studio, consumer and pro audio projects from time to time.
pilatomic
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pilatomic
Bronze
Posted October 7, 2023 at 22:52 GMT
Edited October 7, 2023 at 22:52 GMT
#1659220
Slowly reverse engineering the Datalink protocol used between the BeoMaster / BeoCord / BeoGram 5500, for a secret project.

Location: France

My B&O Icons:

BeoCenter-9500.png BeoCenter-9500.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beoplay-H9i.png Beoplay-H9i.png
Beoplay-A1.png Beoplay-A1.png
Beomaster.png Beomaster.png
Tignum
Online
Tignum
Gold
Posted October 8, 2023 at 14:39 GMT
#1659226
Keep us posted, we will not tell anyone!

Location: Netherlands

My B&O Icons:

Beoplay-A1.png Beoplay-A1.png
Beoplay-H95.png Beoplay-H95.png
Beoplay-P6.png Beoplay-P6.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beoremote-One.png Beoremote-One.png
Beosound-5.png Beosound-5.png
Beovision-10.png Beovision-10.png
MA
Offline
Madskp
Gold
Posted October 8, 2023 at 19:28 GMT
#1659227
link
Slowly reverse engineering the Datalink protocol used between the BeoMaster / BeoCord / BeoGram 5500, for a secret project.
sounds very interesting. Looking forward to more info. Are you avare of these two projects?: link link

Location: Denmark

pilatomic
Offline
pilatomic
Bronze
Posted October 9, 2023 at 10:05 GMT
#1659232
Thank you for the links. I indeed had a look at them, but it turns out they are not comprehensive enough for my use case.

I will of course post my progress here, once I reach a point where I have enough to show to justify a dedicated thread.

Location: France

My B&O Icons:

BeoCenter-9500.png BeoCenter-9500.png
Beoremote-Beo4.png Beoremote-Beo4.png
Beoplay-H9i.png Beoplay-H9i.png
Beoplay-A1.png Beoplay-A1.png
Beomaster.png Beomaster.png
AdamS
Offline
AdamS
Bronze
Posted October 9, 2023 at 13:15 GMT
#1659234
Finally getting round to sorting out my Beolab Penta 2s. I re-foamed the midranges earlier in the year so have now re-fitted them and am working on the amplifiers.

 
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