Amp Issue Involving -=Germania=-
Jul 20, 2009 at 9:46 PM Post #226 of 243
Quote:

Originally Posted by jsaliga /img/forum/go_quote.gif
Is a personal insult the best you have to offer? How very sad.


It's not a personal insult. I never said or implied that you were lying. You clearly missed the bolded title of the section from which you picked the quote, and the 23 separate mentions of Canada, Canadians, Canadian cities, and the CBSA. I am certainly interested to hear more about the European countries we have here in Canada, though.
 
Jul 20, 2009 at 9:53 PM Post #227 of 243
Amp has cleared customs, so it should arrive in a few days. ^^

Biggie.
 
Jul 20, 2009 at 9:53 PM Post #228 of 243
Ok, so now that that's out of the way, no one but biggie or stacy should be commenting here, unless someone else is having a similar problem.
 
Jul 22, 2009 at 4:05 PM Post #229 of 243
Amp arrived. It turned on ok and the computer recognized the dac, but no sound was coming out of the speakers. So I opened the unit up and one of the 4 wires from the dac to the powersupply became unconnected during shipping, so I plugged it back in. Then I got sound from the speakers..for about 4 minutes.

Thats when the led went off, the unit starting humming, and a ticking sound started coming from the amps powersupply. So the unit no longer works.

Biggie.
 
Jul 22, 2009 at 4:10 PM Post #230 of 243
Again, I'd like for people that aren't either germania or biggie to refrain from posting here unless they have something helpful to contribute
 
Jul 22, 2009 at 5:16 PM Post #231 of 243
Biggie,

Perhaps if you post some internal pictures one of us might notice a fault? I would say that it is unlikely since the amp actually worked for a time but I'm sure there's more than 1 of us willing to take a look at it for you.
 
Jul 22, 2009 at 8:09 PM Post #232 of 243
Starting the claim and sent Biggie a few options going forward, this is just the bare-bones of it:
-Sending some money for a new PSU or convert to normal Opus DAC and he gets to pocket whatever insurance money there is.
- Keep unit and get whatever insurance money
- If USPS decides to not honor it, me sending him the money and him sending me the unit (me paying for whatever shipping).

Again, a lot of this hinges on what USPS decides to do and this is just preliminary. If they decide to sit on it, the situation may change.

For reference:
The Amplifier PSU is a Meanwell 2.7A 12V Medical PSU with universal (70-260V) input for reference. The Speaker amplifier is based off of the Tripath 2020 chip.
This is a picture I have of the inside:
Big_amp_top_off.jpg


The situation was one I was despirately hoping not to happen, but the only option at this point is to move forward and be sure to make this right by Biggie.
 
Jul 23, 2009 at 12:22 AM Post #233 of 243
Well, after all this, I can't say I'm surprised that the amp died.
tongue.gif


edit: I've requested a full refund on the unit as I'm not sure it was designed to survive shipping. I hope this can be resolved quickly in the best interest of both parties.

Biggie.
 
Jul 23, 2009 at 12:47 AM Post #234 of 243
-=Germania=- you should be ashamed of charging for such a piss poor wiring and workmanship...
mad.gif


Just an example: Signal wires should be twisted tightly together to improve noise rejection, not ot mention all that power wiring that is hanging around the enclosure...
... securing the wires to the chassis using adesive fixings is normally also a good idea...

what about a panel mount USB connector? too hard to wire or work out grounding schemes?

Biggie, a loose volume knob isn't caused by problems in shipping, it can only be really poor assembly and really bad packing!!!

Germania's readyness to file a claim with USPS makes much more sense now...
rolleyes.gif


-=Germania=- go learn some proper soldering and assembling before trying to make some easy money...
 
Jul 23, 2009 at 1:30 AM Post #235 of 243
Quote:

Originally Posted by MASantos /img/forum/go_quote.gif
what about a panel mount USB connector? too hard to wire or work out grounding schemes?


Indeed! Neutrik - Data Connectors

Standard panel cutout, with a professional finish. And you don't even have to wire it - just use a USB cable to connect the receiver module inside the chassis.
 
Jul 23, 2009 at 5:03 AM Post #236 of 243
Just a few words about some things.

Power wire that fell out was screw set and solid core. It would have to take quite a bit to take it out.

The volume control knob is pressure set (not set screw). The Alps potentiometer was set with a ratchet for the final securing and has a set divot in the panel. The play in the knob is from being knocked around during shipping and the knob should only need a push back in.

All analog parts were set so that signal wiring would be as far away as possible from the transformer and power parts. The same goes with the analog signal wiring which is the line that would be the most affected. The highly visible transformer on the right is fully shielded. EM on the axial from the PSU was very low and floor noise was not noticible even with high sensitivity, low ohm full range speakers.

USB runs on a very specific line impedance range and additional solder joints along with not having very well matched impedance lines can cause problems if you want the best accuracy on the line. PCB mounted gives the best result.

Biggie told me that the box was pretty damaged when he received it. That was a brand new box as well.

I am sending him the refund upfront. He asked and I am obliging.

In this "issue" I have done as asked by Biggie and will continue to do so.

In all honesty, I couldn't imagine a situation of sending someone something that did not work or was not in working order. It wouldn't be worth the effort or dealing with all of the extra hassle. If that was the situation, I would have just sent him back the money and ended it instead of allowing this to continue and giving him what he had waited for.

The item got damaged in shipping, there is just no way that much of these kind of issues with set screw wires could have come undone on their own (done with a racheting screwdiver of which many people have seen this bit of kit at just about every recent meet in the Chicago area) or even with the pressure set volume knob.

I was quick to get on the claim in the interest of time and the parties involved.

It isn't exactly a good feeling to be called names or be put into groups of people who have stolen and continue to do so when you were doing as asked as quickly as you could. Putting it in the mail, only to find that the mail looks to have lost your package, etc. Then, to have something you worked on for many, many hours be abused and break much to the dismay of the person who you really want to satisfy. It makes you feel horrible and will quite literally make you loose sleep if you take things personally. I can understand everything that Biggie is requesting and why. It is the same thing I would have done and he has been very gracious.

The point of the matter is that this was an issue between two parties with attention being brought for people with similar issues. Of which, one person had something in progress and another had a check for a small amount of money which was already en route. The amount of money here was not more than a few hundred dollars which was wrapped up as parts cost and was the exception to the rule.

This isn't meant as an excuse, but as an explanation for anyone who has been following along.

Sincerely,
Stacy
 
Jul 23, 2009 at 5:54 AM Post #237 of 243
It's truly mind boggling the things that can happen in shipping.

I do some work for a manufacturer of big-ass home audio amplifiers.

One day, a customer called to say they'd just received an amplifier they'd purchased. Everything was ok he said except that one corner of the amp's faceplate was broken off.

This caused some eyebrows to be raised, as the faceplate of this amplifier was 3/8" thick and machined from 6061-T6 billet aluminum.

Nevertheless, the customer was told to pack the amp back up and a call tag was issued to have the amp picked up by the shipper, which I believe was UPS.

When the amp arrived, sure enough, one of the corners of the faceplate was broken off.

The strange thing is that the packaging looked just fine. With the sole exception of a single, small hole, about 1/4" in diameter on one side of the shipping carton, which coincided roughly to the corner of the faceplate that had been broken off.

Again, truly mind boggling.

k
 
Jul 23, 2009 at 11:06 AM Post #238 of 243
Quote:

Originally Posted by -=Germania=- /img/forum/go_quote.gif
USB runs on a very specific line impedance range and additional solder joints along with not having very well matched impedance lines can cause problems if you want the best accuracy on the line. PCB mounted gives the best result.


If you can't wire a braided pair at 90 ohms ±15% impedance, then you have no business building amps for profit, or classifying yourself as any sort of 'engineer'.

Quote:

Originally Posted by Koyaan I. Sqatsi /img/forum/go_quote.gif
It's truly mind boggling the things that can happen in shipping.


Yep. My mind still boggles how shipping damage caused all those drill score marks along the bottom of the case.
 
Jul 23, 2009 at 12:28 PM Post #239 of 243
Quote:

Originally Posted by -=Germania=- /img/forum/go_quote.gif
I am sending him the refund upfront. He asked and I am obliging.

In this "issue" I have done as asked by Biggie and will continue to do so.



No offense Stacey but a) I hope you deal with this part of the build in a more timely fashion than you did the build itself and b) I won't believe this until I see Biggie post that he's received the full refund.

Quote:

In all honesty, I couldn't imagine a situation of sending someone something that did not work or was not in working order.


As an occasional builder of things in the non-professional sense I'm simply not going to let this comment stand. Could you please describe what you were thinking when you mounted the power supply? Because what I saw in the internal pictures of this amp looked anything like what I would call "professional" or even just well thought out. I'm willing to be convinced otherwise, so here's your opportunity.
 
Jul 23, 2009 at 1:52 PM Post #240 of 243
I received a full refund of all the money I have sent -=Germania=-. I will be shipping the amp back to her.

Biggie.
 

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