Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Mod-286 build thread
Mod-286 build thread
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 10th August 2018, 09:20 AM   #171
ukhopeful is offline ukhopeful  United Kingdom
diyAudio Member
 
Join Date: Jul 2014
Default Now with added Guardian-86 goodness

Click the image to open in full size.
  Reply With Quote
Old 10th August 2018, 12:05 PM   #172
ukhopeful is offline ukhopeful  United Kingdom
diyAudio Member
 
Join Date: Jul 2014
Default Trigger and remote control

No nasty pops on power on and off now Guardian-86 has been included

YouTube
  Reply With Quote
Old 10th August 2018, 04:34 PM   #173
HarmonicTHD is offline HarmonicTHD  Switzerland
diyAudio Member
 
Join Date: May 2017
Quote:
Originally Posted by ukhopeful View Post
No nasty pops on power on and off now Guardian-86 has been included

YouTube
Nice.

Although I never had any pops during power on / off. At least not if I switch on the source first and even then itís barely audible.
  Reply With Quote
Old 10th August 2018, 07:25 PM   #174
tomchr is offline tomchr  Canada
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Calgary
I always power up from the source to the speaker and power down from the speaker to the source. No pops here.

If you leave the power amp on and turn on the source, you'll likely get a pop as the source's output comes up. There's really no way around that. After all, a pop caused by the source powering up is indistinguishable from any other signal from the power amp's point of view. The amplifier will do its job and amplify the input signal - even if the input is a pop from a source powering up.

If I was to design a system from end-to-end, I'd either control the power-up sequence of the various pieces of equipment or have each output feature a mute switch. There are advantages and drawbacks of both of these approaches.

It's good to see the Guardian-86es being put to good use, though. Thanks for sharing your build pictures.

Tom
__________________
Modulus-686: 240W/8Ω @ <0.00025% THD. Modulus-86: 40W/8Ω @ 0.000054% THD. DG300B & Other Tube Circuits.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
  Reply With Quote
Old 10th August 2018, 08:18 PM   #175
ukhopeful is offline ukhopeful  United Kingdom
diyAudio Member
 
Join Date: Jul 2014
The problem I had was at power off. When the preamp triggered the power amp, the power amp powered down more slowly that the preamp. One solution would be to delay the preamp power down which would require a firmware change to the control board I am using. Since that is not possible yet, the Guardian-86 fixes it by muting the speakers quickly enough.
  Reply With Quote
Old 10th August 2018, 09:04 PM   #176
tomchr is offline tomchr  Canada
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Calgary
Yeah. It does take a bit for the supply caps to discharge. Thanks for clarifying.

I'm glad the Guardian-86 worked out well for you.

Tom
__________________
Modulus-686: 240W/8Ω @ <0.00025% THD. Modulus-86: 40W/8Ω @ 0.000054% THD. DG300B & Other Tube Circuits.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
  Reply With Quote

Reply


Mod-286 build threadHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cheap (<100Ä) Digital Tube Tester from ebay; experience/build/mod thread pauldune Equipment & Tools 21 17th April 2018 07:21 PM
Need help to build a system around Modulus-286 alexwey Chip Amps 11 26th May 2017 01:32 AM
rewiring a Sony PUA-286 tonearm eidling Analogue Source 1 8th October 2006 06:43 PM


New To Site? Need Help?

All times are GMT. The time now is 06:45 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki