Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th December 2004, 02:22 PM   #1
diyAudio Member
 
Join Date: Sep 2002
Location: Rosmalen, The Netherlands
Default ASR Active mainscable

Hello all,

Does anybody know more about the active mains cable made by the German manufacturer ASR?
The description sounds interesting, it's more than just a filter for mains "noise". They claim that there's also active components inside.
Does anybody have a clue as to what circuit could be inside?

Greetings,

Jarno.
Attached Images
File Type: jpg emitter1_n_b.jpg (16.4 KB, 252 views)
__________________
Oemptempa petoempetapap
  Reply With Quote
Old 17th December 2004, 03:09 PM   #2
MikeB is offline MikeB  Germany
diyAudio Member
 
MikeB's Avatar
 
Join Date: Apr 2004
Location: GŁtersloh
According to their site, it's a shielded cable, and the box contains
a DC-Filter and HF-suppresion.

http://www.asraudio.de/technik/asr_t_nk.html

Mike
  Reply With Quote
Old 17th December 2004, 05:32 PM   #3
diyAudio Member
 
Join Date: Sep 2002
Location: Rosmalen, The Netherlands
Hello Mike,

Yes, I've read all the articles on this cable so I know that there's a DC block and HF suppression in the box. The HF suppression could be a rather straightforward affair with some caps and inductance, oversized as well because it's rated at 2000VA. Now for the DC blocking stuff, how is this implemented? They say that there are active components inside, could they use these for the blocking of DC?
Does anybody have a possible schematic of this circuit?

Regards,

Jarno.
__________________
Oemptempa petoempetapap
  Reply With Quote
Old 17th December 2004, 10:01 PM   #4
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
capacitors block DC eh?

maybe a capacitance multiplier, with a moderately sized cap. and a decent HV transistor...?
__________________
Jesus loves you.
  Reply With Quote
Old 17th December 2004, 11:41 PM   #5
Eva is offline Eva  Spain
diyAudio Member
 
Eva's Avatar
 
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
Are diodes or transils/trisils considered active components?

Most DC blocking circuits include these components to clamp the voltage drop across the blocking capacitor and prevent its destruction in case of overload

In the other hand, if 1 meter of shielded wire with two plastic-molded connectors, a 2KW EMI filter and a 2KW DC filter costs more than 30 euro then it's pure snake oil...

Also, this box is by far too small to have enough room for a decent 2KW EMI filter including common-mode filtering and differential-mode filtering, and a 2KW DC filter, so everything may be just a fairy tale
  Reply With Quote
Old 18th December 2004, 12:11 AM   #6
diyAudio Member
 
Join Date: Apr 2004
Location: 12km off the alaska highway in northern BC
http://www.hometheaterhifi.com/volum...s-12-2004.html

Something to consider
  Reply With Quote
Old 18th December 2004, 12:35 AM   #7
Stocker is offline Stocker  United States
diyAudio Member
 
Join Date: Dec 2003
Location: Austin
Quote:
Originally posted by audio-kraut
Something to consider [/B]



Indeed.
__________________
Jesus loves you.
  Reply With Quote
Old 18th December 2004, 09:58 AM   #8
diyAudio Member
 
Join Date: Sep 2002
Location: Rosmalen, The Netherlands
That's a very interesting article indeed. I don't believe in the audible superiority of expensive mains cables either, but I do believe that you can equip mains cables with extra functionality such as the suppression of mains borne nasties.
This is why I was wondering if somebody's got a clue as to what could be inside the box.
__________________
Oemptempa petoempetapap
  Reply With Quote
Old 18th December 2004, 01:13 PM   #9
Previously: Kuei Yang Wang
 
Join Date: Nov 2002
Konnichiwa,

Quote:
Originally posted by Jarno
Now for the DC blocking stuff, how is this implemented? They say that there are active components inside, could they use these for the blocking of DC?
Typhically the DC blocker circuit is a pair of Electrolytic Capacitors of large value (but fairly low voltage, ripple current must be high though) back to back with some form of protection diodes (most often found are simple bridge blocks with shorted +/- connections, AC connections across the capacitors.

BTW, in my view such DC protection is required for all torroidal transformers. The noise filter is also a good idea with these, as their superb HF coupling means any high frequency junk riding on the mains rides straight through the transformer.

So, ASR's "active" mainscable actually compensates for basic design flaws in the equipment, sadly design flaws that apply to 99.9% of all audio gear.

Sayonara
  Reply With Quote
Old 18th December 2004, 01:27 PM   #10
lohk is offline lohk  Europe
diyAudio Member
 
lohk's Avatar
 
Join Date: Apr 2001
Location: Northern Noricum, near the Limes
I just fount that on a www.audiomap.de forum

A circuit like this seems to be build in in any Bryston amp...
Interestingly on the neutral side...
Attached Images
File Type: gif 1059.gif (5.5 KB, 226 views)
__________________
/lohk/
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Active 3-ways with solen active loudspeaker module soundemon Multi-Way 14 19th March 2009 11:17 AM
Component Suggestion: 2-way active now, 3-way active later CanadianDream Multi-Way 6 3rd August 2007 04:53 AM
Behringer DCX2496 I want to try active biamping using it as the active xover. georgehifi Digital Line Level 3 15th August 2006 07:46 AM
Active 3 Way vs Active 2.1: Too many alignments and too may questions. goldyrathore Multi-Way 1 22nd April 2005 02:42 PM
XVR1 active crossover, discrete active stage promitheus Pass Labs 18 22nd July 2002 01:29 AM


New To Site? Need Help?

All times are GMT. The time now is 04:50 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2