Commercial Gainclone kit- building instructions - Page 69 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Audio Sector

Audio Sector Kits & PC boards from AudioSector

Reply
 
Thread Tools Search this Thread
Old 8th May 2009, 02:39 PM   #681
diyAudio Member
 
tiglitosa's Avatar
 
Join Date: Feb 2009
Location: Athens Greece
Send a message via MSN to tiglitosa
Thanx Peter

I think i will give it a try although its a weird deisng and gives me already lots of puzzles (that is happening when you leave you designer wife to make the plans for the box )


thank you
  Reply With Quote
Old 11th May 2009, 09:32 PM   #682
diyAudio Member
 
Join Date: Feb 2008
Hi,

I just completed two monoblock amplifiers using the Audiosector premium kit and I am doing the preliminary tests before connecting them to a speaker. I just tested the rectifier boards. I have two transfomers 300VA 25VAC with dual secondaries.
One monoblock seems OK, but the other one has a strange behavior (for me at least, a genuine newbie). Indeed using my DMM I measure 22 DCV at both V- PG- and
V+ PG+ which seems correct, but, by mistake, I verified that simultaneously they also measure 47ACV again between V-PG-, V+PG+ (?)

I checked and checked again, always the same result. The other monoblock measures 0 ACV at both V- PG- and V+PG+.

Any idea on my mistakes?


Renato
  Reply With Quote
Old 13th May 2009, 01:39 PM   #683
diyAudio Member
 
Join Date: May 2009
Gah, I'm stuck between which option to get.
Premium vs. Classic.

I don't know if I can justify the extra US$36 (~AU$50) for 2 extra Panasonic caps, a better quality PCB and name brand resistors.

Any suggestions/justification for either?
  Reply With Quote
Old 13th May 2009, 01:56 PM   #684
diyAudio Member
 
tiglitosa's Avatar
 
Join Date: Feb 2009
Location: Athens Greece
Send a message via MSN to tiglitosa
Quote:
Originally posted by mattcalf
Gah, I'm stuck between which option to get.
Premium vs. Classic.

I don't know if I can justify the extra US$36 (~AU$50) for 2 extra Panasonic caps, a better quality PCB and name brand resistors.

Any suggestions/justification for either?

IMHO i think that this extra cost is well justified.
If you get lets say caddocks or other resistors that have 1% tolerance that means the original values the designer has calculate will be present.
THD will be what he predicted etc. So imagine as far as resistor goes to have 20% tolerance.
You thing that your output will be the same?
The same goes with the other components as far as tolerance and magnetic behavior and other factors.
Wouldn't be to tedious to unsolder the components later for better ones?

Anyways thats just an opinion ;-)
The conclusion is to be happy with your sound



Nick
  Reply With Quote
Old 13th May 2009, 02:07 PM   #685
diyAudio Member
 
Join Date: May 2009
Quote:
Originally posted by tiglitosa



IMHO i think that this extra cost is well justified.
If you get lets say caddocks or other resistors that have 1% tolerance that means the original values the designer has calculate will be present.....
Anyways thats just an opinion ;-)
The conclusion is to be happy with your sound



Nick

That's what I was after, I'm of course still open to others opinions but I think you mightve just justified the extra cost.

Cheers.
  Reply With Quote
Old 13th May 2009, 02:11 PM   #686
diyAudio Member
 
tiglitosa's Avatar
 
Join Date: Feb 2009
Location: Athens Greece
Send a message via MSN to tiglitosa
Of course,

if you are curious enough after buying the premium kit you will start changing components to test the result

So its up to you !!

Nick
  Reply With Quote
Old 13th May 2009, 02:16 PM   #687
diyAudio Member
 
Join Date: May 2009
I think I'll go the premium kit, and down the line when I have funds for some other types of amps (I have my eyes on a T-amp at this stage) I will compare and either sell the losing amp or build some more speakers for them to power.

  Reply With Quote
Old 13th May 2009, 02:19 PM   #688
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Premium kit is just the premium resistors and chips sorted for low offset.

You can get Classic kit and just order 6 additional resistors to save on cost (4 x 22k Caddock and 2 x 620R Rikens). 220R resistors are not really needed, and you can place jumpers in their spots.

Resistors tolerance is not critical, as long as they are matched to each other (in both channels)
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 13th May 2009, 02:21 PM   #689
diyAudio Member
 
Join Date: May 2009
Quote:
You can get Classic kit and just order 6 additional resistors to save on cost
That sounds like the option for me, I'll be in contact once I have my current project under control.

Thanks.
  Reply With Quote
Old 15th May 2009, 09:20 AM   #690
diyAudio Member
 
Join Date: Feb 2008
Hi,

thanks to the help of this great thread finally I got my two monoblock amps with the audiosector premium kit working.

Everything went (almost) smooth, no hum, no bump when I switch off the amps.

I still need to build a passive pre, now I am just checking them connected to an ipod (headphone out connection so I can set volume).

I only get a bump when I switch on the ipod with the amps already on.

Thank to everybody here

Renato
  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
Commercial complete Gainclone kit for a beginner? gychang Chip Amps 365 4th October 2011 09:19 AM


New To Site? Need Help?

All times are GMT. The time now is 01:52 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