hypex ncore - Page 511 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Vendor's Bazaar

Vendor's Bazaar Commercial Vendors large & small hawking their wares

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 2nd October 2012, 09:52 AM   #5101
bavmike is offline bavmike  Canada
diyAudio Member
 
Join Date: Dec 2011
Location: In the forest
Quote:
Originally Posted by troystg View Post
Your Monster power bar is a conditioner or does it regulate also? 120 is VERY high for a home circuit, usually 110-115VAC is the norm.

Get (borrow) a Fluke 87 series meter and use the record the max/min voltage function to see if it varies up any..
I had the same issue with a linear power supply on my UcD amps.. My line voltage was 118VAC so I put a cl60 in series and upped the resistors values in my twisted pair power supply PCBs and was able to just squeek under the limit.

I don't know if the Hypex SMPS has an auto adjust funtion to switch between 115 and 230 VAC.
No the monster is just a conditioner, no voltage regulator built in. The readout varies between 118-119v at home where I've never had a problem with the amps. It's stays locked on 120v at the shop and doesn't move. I hooked up the monster bar to my UPS and when I unplugged it from the wall, it switches to the battery supply, both of the amps start working and the readout drops to 109-110v. As soon as I plug it back in one fires up and the other flashes on and off intermittently. Without the monster plugged in both won't work at all. I imagine this is because the monster bar absorbs some of the electricity bringing the voltage down slightly.
  Reply With Quote
Old 2nd October 2012, 09:53 AM   #5102
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by troystg View Post
I don't know if the Hypex SMPS has an auto adjust funtion to switch between 115 and 230 VAC.
It has.
  Reply With Quote
Old 2nd October 2012, 09:55 AM   #5103
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by bavmike View Post
I hooked up the monster bar to my UPS and when I unplugged it from the wall, it switches to the battery supply, both of the amps start working and the readout drops to 109-110v. As soon as I plug it back in one fires up and the other flashes on and off intermittently. Without the monster plugged in both won't work at all. I imagine this is because the monster bar absorbs some of the electricity bringing the voltage down slightly.
It does sound like over-aggressive overvoltage protection in the amps.
  Reply With Quote
Old 2nd October 2012, 09:59 AM   #5104
bavmike is offline bavmike  Canada
diyAudio Member
 
Join Date: Dec 2011
Location: In the forest
Quote:
Originally Posted by Julf View Post
It does sound like over-aggressive overvoltage protection in the amps.
Ya seems that way. It would be nice if I could adjust it at home. But on the other hand it might be a good idea to run that voltage regulator anyways. Unless it has any detrimental effects on the sound quality. I read some stories about other audiophiles using the APC regulator with their delicate tube gear with very positive results.
  Reply With Quote
Old 2nd October 2012, 10:47 AM   #5105
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally Posted by Julf View Post
And do you run the cables in such a way that the speaker cables can induce voltages into the phono input?

Not sure what is the prescribed way to run cables carrying 600mV @450kHz so they don't radiate. Tonearm, which by design has a piece of unscreened, unshielded signal carrying wire is about a meter away.
  Reply With Quote
Old 2nd October 2012, 10:58 AM   #5106
Julf is offline Julf  Europe
diyAudio Member
 
Join Date: Oct 2011
Location: Amsterdam, The Netherlands
Quote:
Originally Posted by analog_sa View Post
Not sure what is the prescribed way to run cables carrying 600mV @450kHz so they don't radiate.
Preferably as twisted pairs.

Quote:
Tonearm, which by design has a piece of unscreened, unshielded signal carrying wire is about a meter away.
As long as the signal wire doesn't run parallel with the speaker cable, I wouldn't think there would be much interference. How badly does the phono input pick up stray fields from stuff like mobile phones? Can you twist the unshielded signal wires together? And how about putting a small HF capacitor to shunt off HF in parallel with the phono input?
  Reply With Quote
Old 2nd October 2012, 12:09 PM   #5107
ChrisPa is offline ChrisPa  United Kingdom
diyAudio Member
 
Join Date: Jan 2005
Location: Saddleworth
Quote:
Originally Posted by analog_sa View Post
Not sure what is the prescribed way to run cables carrying 600mV @450kHz so they don't radiate.
Only run them at the speakers
Monoblock amps behind each speaker with xlr leads to the amps
  Reply With Quote
Old 2nd October 2012, 12:12 PM   #5108
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Sofia
Quote:
Originally Posted by Julf View Post
Preferably as twisted pairs.



As long as the signal wire doesn't run parallel with the speaker cable, I wouldn't think there would be much interference. How badly does the phono input pick up stray fields from stuff like mobile phones? Can you twist the unshielded signal wires together? And how about putting a small HF capacitor to shunt off HF in parallel with the phono input?

Thanks. All good advice but not really applicable. Staying away from anything class D seems the easier option at present.
  Reply With Quote
Old 5th October 2012, 06:48 AM   #5109
diyAudio Member
 
Join Date: Mar 2007
Quote:
Originally Posted by analog_sa View Post
Thanks. All good advice but not really applicable. Staying away from anything class D seems the easier option at present.
  Reply With Quote
Old 5th October 2012, 02:14 PM   #5110
diyAudio Member
 
Join Date: Jul 2010
Default That...

Quote:
Originally Posted by analog_sa View Post
Thanks. All good advice but not really applicable. Staying away from anything class D seems the easier option at present.
Is certainly one option. But, you have also learned something here: your turntable/phono pre set up is sensitive to RF. I would suggest that it is overly sensitive even. It might be a good idea to address this sensitivity, even if you choose not to use a Class D amplifier in your system, as RF pickup from the general background RF levels may be affecting the performance of your vinyl rig in a more subtle way.
Certainly, I would expect tonearm wiring to be twisted. And I would pay special attention to the wires carrying the signal from the 'table to the phono pre as well, making sure that they are high quality, as short as possible, and properly shielded. I do not design phono pre-amps, but considering the high gain needed, would it not be prudent for them to be designed with an RF filter at the input? Perhaps this is one reason why so many who use low output MC cartridges prefer the sound of a step transformer as the first gain stage for vinyl playback, as the transformer itself should be an effective filter against high frequencies. I often wonder why people do not always take full advantage of the fact that phono cartridges output balanced signals; a fully balanced phono pre seems to make perfect sense to me, this approach, coupled with a transformer input, ought to be able to reject any noise pickup at all.
  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
Hypex problem, who can help Hansms Class D 9 18th August 2013 06:49 AM
Hypex steveww Class D 14 18th November 2010 01:44 PM
Question for those who have tried hypex smps with hypex modules avian Class D 12 3rd March 2009 09:30 AM
Hypex UcD 180AD + signal wires, Power Supply ST, Hypex Transformer TR100A c10h12n2 Swap Meet 7 7th July 2007 03:55 PM
FS: Hypex UcD 400/180AD, hypex toroid Archmage Swap Meet 4 14th November 2006 04:23 AM


New To Site? Need Help?

All times are GMT. The time now is 07:28 PM.


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