First official review of the GainClone - Page 4 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 8th July 2003, 02:47 PM   #31
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Peter,

Good thing you use Black Gates.
Never use Panasonic caps, with a 10-year guarantee, you would have plenty of problems, hahahahaha, LOL!
  Reply With Quote
Old 8th July 2003, 02:59 PM   #32
fedde is offline fedde  Netherlands
diyAudio Member
 
Join Date: Jul 2002
Location: Eindhoven, the Netherlands
Send a message via ICQ to fedde
It's still a risk, such a long guarantee! Though I think that all amplifiers should at LEAST work without maintenance for this period!

Did you try a torture test on your amp Peter !? So an extended period of high power sine waves and music ? Once, I managed to kill one opamp by very loud music. (LTJ Bukem, Intense CD, Live jungle with very much BASS). But my opamps were not properly cooled in that case. It would be a pity if you have to repair your amps every time that the owner has had a party...

Fedde
__________________
http://www.fedde.nu, gainclone and non-oversampling DAC audio projects and kits...
  Reply With Quote
Old 8th July 2003, 04:31 PM   #33
diyAudio Member
 
chris ma's Avatar
 
Join Date: Sep 2001
Location: Pickering, Canada
No Peter,

What I meant was there are many types of human being in this crazy world nowadays. Certain types might try modifing job to the amp themselves and may be slimmy enough to use the warranty to cover their mistakes...so they buy the amp try it , tweak it and then say it is faulty etc etc...

Chris
  Reply With Quote
Old 8th July 2003, 04:43 PM   #34
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
I will always support tweaking. And if they find a better way to implement the circuit, I hope they'll let me know

I will probably notice if anybody tried to resolder my joints when unit is sent for warranty service. The same can be also applied to trying modify PCB assembly. We could go as far as try to spray everything, so any tampering with the original circuit is visible. But we won't.

As to the potting, I did it before, but I don't think it's a way to go. Beside even heat distribution I don't think it has any other advantages and it probably degrades the sonics by overdamping the circuit.
__________________
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 8th July 2003, 04:47 PM   #35
diyAudio Member
 
jan.didden's Avatar
 
Join Date: May 2002
Location: Great City of Turnhout, Belgium
Blog Entries: 7
Peter, think carefully.

We all hope you sell lots of these, but have you plans in place in case you sell say 10 or 20 a week? Can you manage that?

Ten years guarantee is commendable, but say the average failure rate is 5 years (these amps will face real abuse in the hands of "typical users". In time it will get better, because you will start to see the weak points and will improve on that).

After selling 100 pieces, you are faced with 20 failures per year, a couple per month. When you sell 500, and they fail on average after 5 years, you will have to provide free repairs for 2 per week. There is a reason that the average industry guarantee is just one or two years.

Just trying to make you aware that this is very different than building a couple of amps for your friends.

Jan Didden
  Reply With Quote
Old 8th July 2003, 04:59 PM   #36
diyAudio Member
 
chris ma's Avatar
 
Join Date: Sep 2001
Location: Pickering, Canada
So Peter,
The warranty also covers for any tempering too? Wow ..I bow to you wholehearty

But Peter please think it over again or may be seek different opinions from the like of the one and only etc etc...

we do care for yo...uu..er.., your excellent diy skill...

Chris
  Reply With Quote
Old 8th July 2003, 05:11 PM   #37
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
With 10 years warranty we try to gain marketing edge over the competition. Only the future will show how it works out. But I also remember that Bryston offers (or offered) 20 years warranty.

If the product goes through the distributor, the terms of warranty might change. 10 years is only our initial offer.

Here's example from PassLabs manual:

Warranty Information
This product is warranted for parts and labor from the date we ship it. Check with the factory
authorized distributor in the country you are purchasing this product for specific warranty
information.
Distributors are only required to offer warranty service on Pass products that they have sold.
They are not obligated to offer warranty repair for products purchased from other distributors.
Products purchased from other distributors should be returned to the country of purchase for
warranty repair.
__________________
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 8th July 2003, 05:20 PM   #38
diyAudio Member
 
nobody special's Avatar
 
Join Date: Oct 2002
Location: USA
Interesting... I didn't know you could overdamp something like that. Is the problem that you are raising the resonant frequency with the potting? It would be really great if you could write up some of your ideas on damping and proper chassis design. I know you are busy (or will be very soon), but I think there are a lot of people that would like to read something like that.

As far as the failure rate of the circuit, etc. goes- the only problems I can imagine with these amps would be 1. initial quality problems (not likely!) 2. The capacitors not living the whole 10 years (you never know... I have a Marantz receiver at home that is 20+ years old with original caps, still works great) 3. problems with oscillation / instability due to interface/cabling issues (documentation will need to state possible issues with too long of speaker cables, etc.).
The chip, with it's built-in protection, pretty much guarantees that no one will melt one down with abuse. The user will definitely hear it if they push it too far! I think the design is pretty durable, and a good safe bet.
__________________
Steve
  Reply With Quote
Old 8th July 2003, 05:28 PM   #39
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
There were few threads about potting:
http://www.diyaudio.com/forums/show...ghlight=potting
http://www.diyaudio.com/forums/show...ghlight=potting

and usually the opinion was that potting is not a good thing sonically. Good example is comparison between regular and 'nude' Vishays or reading the review of Sumiko Blue Point and Blue Point Special cartridge (which has its plastic body removed).

I myself didn't do much experimentation with potting and it's only my assumption that it may not be actually preferrable.
__________________
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 8th July 2003, 05:31 PM   #40
jleaman is offline jleaman  Belgium
Banned
 
Join Date: Apr 2002
Send a message via AIM to jleaman
Default Re: Re: Peter Rules!

Quote:
Originally posted by Peter Daniel


You should 've not say that, as I was just thinking about sending one amp for you to try

Ill try one of the famouse peter daniel Amps.. PWEASEE...
  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



New To Site? Need Help?

All times are GMT. The time now is 07:21 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