Speakerplans.com Homepage
Forum Home Forum Home > General > Amp Forum
  New Posts New Posts RSS Feed - Amp Internals 2
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Amp Internals 2

 Post Reply Post Reply Page  <1 231232233234235>
Author
Message
 Rating: Topic Rating: 1 Votes, Average 5.00  Topic Search Topic Search  Topic Options Topic Options
jbl_man View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 12 January 2005
Location: London.
Status: Offline
Points: 10796
Post Options Post Options   Thanks (0) Thanks(0)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 4:43pm
Nine seems an odd number of smoothing capacitors?
Be seeing you.
Back to Top
Peter Jan View Drop Down
Young Croc
Young Croc
Avatar

Joined: 16 December 2008
Location: Belgium
Status: Offline
Points: 942
Post Options Post Options   Thanks (0) Thanks(0)   Quote Peter Jan Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 6:08pm
I see two different groups of capacitors, maybe one set is primary and the other secondary ?
Back to Top
Earplug View Drop Down
Old Croc
Old Croc


Joined: 03 January 2012
Location: Europe
Status: Offline
Points: 6104
Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 6:27pm
Originally posted by jbl_man jbl_man wrote:

Nine seems an odd number of smoothing capacitors?



That´s B&O for you. Hifi. An even number would upset the cosmic equilibrium!     LOL

 
Earplugs Are For Wimps!
Back to Top
M4trix View Drop Down
Registered User
Registered User
Avatar

Joined: 23 June 2009
Location: Croatia
Status: Offline
Points: 371
Post Options Post Options   Thanks (0) Thanks(0)   Quote M4trix Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 7:45pm
Originally posted by jbl_man jbl_man wrote:

Nine seems an odd number of smoothing capacitors?


Do you have some sort of OCD ? Like, everything needs to be in pair ? I have OCD as well but
didn't notice the 9th capacitor ! LOL
Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4492
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 22 May 2020 at 8:55pm
4 mains dc smoothers and the other 5 are the secondary. Only a single ended power supply as it's class-D full bridge.

Switched it on and something went BANG
K. Edwards Electronics Engineers

North Staffordshire

Back to Top
Earplug View Drop Down
Old Croc
Old Croc


Joined: 03 January 2012
Location: Europe
Status: Offline
Points: 6104
Post Options Post Options   Thanks (0) Thanks(0)   Quote Earplug Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2020 at 9:56am
"Switched it on and something went BANG "

That sounds about right for those modules as well!  LOL

One company here used the 500A and 1000A modules to power a range of speakers they brought out. They never lasted very long - especially the sub cabs, that blew up very quickly. They then did a deal with RAM to manufacture modules for them, which were (marginally) better.   Ermm



Earplugs Are For Wimps!
Back to Top
kedwardsleisure View Drop Down
Old Croc
Old Croc


Joined: 20 January 2009
Location: Staffordshire
Status: Offline
Points: 4492
Post Options Post Options   Thanks (0) Thanks(0)   Quote kedwardsleisure Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2020 at 11:48am
Citronic-badged PRO3200

Not sure the quality of the fuse-changing fills me with confidence!











Edited by kedwardsleisure - 25 June 2020 at 1:22pm
K. Edwards Electronics Engineers

North Staffordshire

Back to Top
HonkyJones View Drop Down
Registered User
Registered User
Avatar

Joined: 14 January 2017
Location: UK
Status: Offline
Points: 51
Post Options Post Options   Thanks (1) Thanks(1)   Quote HonkyJones Quote  Post ReplyReply Direct Link To This Post Posted: 25 June 2020 at 1:51pm





I found this Leak Stereo 20 on the Russell Technologies website. Read some of the engineer's commentary LOL He's a funny guy! Some more internals on there too, enjoy!

Back to Top
jbl_man View Drop Down
Moderator Group
Moderator Group
Avatar

Joined: 12 January 2005
Location: London.
Status: Offline
Points: 10796
Post Options Post Options   Thanks (0) Thanks(0)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2020 at 9:27am
Originally posted by kedwardsleisure kedwardsleisure wrote:

Citronic-badged PRO3200










Is that potting compound or just black splodge all over that driver board Kevin? How the hell is anyone spose to repair that?

Edit....quite liking the heatsink though,very artistic! Smile



Edited by jbl_man - 26 June 2020 at 9:31am
Be seeing you.
Back to Top
odc04r View Drop Down
Old Croc
Old Croc
Avatar

Joined: 12 July 2006
Location: Sarfampton
Status: Offline
Points: 5483
Post Options Post Options   Thanks (0) Thanks(0)   Quote odc04r Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2020 at 9:43am
Looks like potting compound, maybe the manufacturer had problems with vibration on those components or shorting due to dust, then rather then redesign everything the boards got potted to make the problem go away. Or it could be linked to temperature sensing.
Back to Top
M4trix View Drop Down
Registered User
Registered User
Avatar

Joined: 23 June 2009
Location: Croatia
Status: Offline
Points: 371
Post Options Post Options   Thanks (0) Thanks(0)   Quote M4trix Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2020 at 9:05pm
Maybe to prevent or make it harder for the reverse engineers. Wink

Edited by M4trix - 26 June 2020 at 9:07pm
Back to Top
Wikl109 View Drop Down
Young Croc
Young Croc


Joined: 29 April 2009
Location: Yorkshire
Status: Offline
Points: 874
Post Options Post Options   Thanks (0) Thanks(0)   Quote Wikl109 Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2020 at 9:56pm
Originally posted by HonkyJones HonkyJones wrote:






I found this Leak Stereo 20 on the Russell Technologies website. Read some of the engineer's commentary LOL He's a funny guy! Some more internals on there too, enjoy!


Honky Jones, can I just say you made my day by linking to this guys website. This quote regarding the Crown DC300A really made me smile:
"Check out this bollocks of a switch. It's designed so that the thin metal sides cut through the soft plastic rocker every time it is operated. It is about to pop apart and spill its guts. It is mounted so that it can't be removed without taking half the works out. It is a weird shape and size so I can't replace it with a proper one. I like to imagine that the designer of it is no longer with us, having died in a bizarre accident.
Fixing this is going to be the time-consuming bit of the operation."
Classic.
Cheers, Chris.
Back to Top
 Post Reply Post Reply Page  <1 231232233234235>
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.250 seconds.