• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

O2 amp Australian parts GB

Status
Not open for further replies.
I've started populating the board. Those 1.5K resistors for R16 & R22 are not going to fit very well at all. Using the larger resistor will mean that they will have to be tombstoned or otherwise just jammed in there - not nice.

Farnell have some small 1.5K resistors in stock. I'll buy some and send them on to BF for inclusion in the kits ASAP.

The second matter is only of concern to new builders. BF has grouped and packaged several resistors into anti-static bags, and then labelled the bag with the contents. This means that each of the 4 or 5 anti-static bags containing resistors each contain several values of resistors, which means that you MUST measure the resistors before installing them - so for any newbie builders; get yourself a DMM (even a $10 one from Bunnings) before you start.


Surely the longer resistors will fit if you just mount body of the resistor vertically? Or is that what you meant by tombstoning? I'm not concerned so I wouldn't rush out to get extra resistors at this stage. I'm comfortable sticking with the ones that BF has ordered for my build.

I'd hope anyone building has a DMM, I wouldn't plug headphones into a circuit that hasn't had a few measurements taken.
 
Surely the longer resistors will fit if you just mount body of the resistor vertically? Or is that what you meant by tombstoning? I'm not concerned so I wouldn't rush out to get extra resistors at this stage. I'm comfortable sticking with the ones that BF has ordered for my build.

I'd hope anyone building has a DMM, I wouldn't plug headphones into a circuit that hasn't had a few measurements taken.

In other projects there have been good technical reason for not tombstoning parts that should have been installed close to the board. I have no idea whether installing the resistors off the board in the O2 is likely to cause problems or not. I'd be surprised if NwAvGuy has done measurements with parts installed of the board.

Given that the right sized resistors from Farnell cost me $3.25 for 120. I'm happy to pay for them and eat the postage to avoid any further possible complication on this GB. I should have them here tomorrow, and I'll overnight them to BF, who will have them on Thursday.

As for the DMM, I know that quite a few people are using the O2 as their first build - I have no idea how many in the Aus GB are though. Someone posted quite early on about being inexperienced and wanting a build walkthrough.
 
I have tested the gain resistors up in the air using the optional sockets in the parts list. And it's fine to use 1/4 watt resistors on end in the power control circuit (around U2). But fordgtlover is correct, I haven't tested the other locations. If there are any parts issues/conflicts/questions on components for group buys please feel free to contact me directly.
 
Thanks for the clarification RS!

still no answer from BF on how to pay for the extra batteries. if the paypal account enabled again? its really much easier for me.

Anyone heard from BF what's going on lately? Trust me I hope BF doesn't regret saying those things about Christmas

:hohoho:
:santa2:
:grouphug:

@fordgtlover, how's your build coming along or are you holding off any more building until you get the replacement resistors from e14?
 
@fordgtlover, how's your build coming along or are you holding off any more building until you get the replacement resistors from e14?

I've been slowly building while I wait for the resistors and for the black 3.5mm sockets.

I'll do a bit more work tonight, but I don't expect the sockets to arrive until early next week.

To be honest, I didn't want to post any progress photos so as not to rub in the fact that I am the only one in the GB with something to build so far 🙁

The resistors arrived from Farnell today. I'll ship them to BF overnight tomorrow.
 
I think 99.99% it will reach me after 2012.
I ordered 2 units, 1 is for my friend Xmas present, I am screwed.
Thank you very much.

that was my plan as well. i received the pcbs late last week, with how busy i am now and with the time left before then, theres not a chance in hell of me getting it done, since its part of a DAC/AMP that will need custom casework. i was building for my best friend and i'm not giving him an IOU, i'll have to buy something else and it wont be as good, plus ive already got most parts, so it'll mean buying 2 presents

I wonder whether BF realises just how many peoples plans hes ****** up, rather personal meaningful plans too; as i'm sure we are not the only 2 with this idea given the good quality, nice price, coolness factor and personal touch that building something like this for a friend has.

still no answer to the single simple question ive posed 3 times re the batteries. i guess the PP account is still closed, i wonder why?
 
Last edited:
harsh? maybe, my apologies sorry BH (see doesnt help much does it?) but seeing this weekend pass with all these people waiting, my own plans, made far further in advance than normal and thinking i had it covered well and truly, to just having enough time, to not having enough time and then to have the weekend pass with no real update for these guys, one whos in exactly the same position as me, except he doesnt even have pcbs and nothing but a post saying you made a long post but it was deleted?........
 
I have two people waiting on me as well and at this time of the year it would hit quite hard to have to pay them back if they run out of patience.

Alas, all that is keeping me hopeful is fordgtlover's kit and qusp's PCBs...

Please BlueFusion, an update on the front panels at least?
 
Where's the update at BF?

Alas, here we go again.

Alas, we'll wait some more. :usd:

If you're wondering, 'where did I go wrong?' (I hope you might be). Here's a clue: you took almost 4 weeks between when I got you a quote on enclosures (that saved something like $3-5/enclosure) just to place the order for them. You waited till after the quote had expired! This is after you'd already collected most of the money from everyone. Then it was nearly a week between once you had enclosures and when you got them to the (mystery) machinist. Now we are (I assume based on no info from you, just joining the dots for myself, again) waiting on front panels that never should have been a problem at all!



A week and a half ago (27 Nov) you said 'this week' on the panels, lets see them!
 
Last edited:
one has to assume given the current situation and the repeated dodging of the questions re panels and generally finishing this GB off; that there is a possibility BF has been playing games with the funds at some point, i cannot see another reason for the unending delays and the extended periods of no contact at all. surely it cant be just bottomless incompetence? those are afterall the only 2 options, because simply ignoring what has to be done so long that it cannot be done anymore, like perhaps the unnamed contractor for the panels now being on holidays, or in the middle of other work meaning the panels cant be finished

alas we found out too late, we have online precedent of such behaviour by BF.

alas if this continues, rather more official action has to be taken.

alas i dont think it will be Christmas cheer that is shared
 
Last edited:
I haven't been following this thread very closely, but it's not good to hear people are unhappy about a lack of response on when their orders will be shipped out. I sincerely hope BlueFusion will respond soon and use his best efforts to get as much shipped out as quickly as possible. At the very least, more information would be very welcome.

That said, I do want to remind everyone the amount of work involved in larger group buys, versus the amount of profit for the one doing most of the work, can make it closer to a "volunteer" effort. As such, it's not always fair to hold volunteers to the same standards as a commercial vendor that's typically making a living off their sales rather than doing it as a hobby.

I can't vouch for any of the people conducting group buys here. My assumption was those who would undertake a serious group buy would be those who had at least some experience conducting or helping with them in the past for other diyAudio projects. Hopefully this one will turn out reasonably OK sooner rather than later and everyone will get what they ordered.
 
This is terrible. I have been pretty calm about it until not long ago (realising what RS is saying about the massiveness of the job), but I'm losing my patience and confidence.

Although undoubtedly a huge job, BF should not have volunteered if he was not up for it. More over, different offers to give him a hand have not been answered.

Seeing as I have $200 invested in this, what are our options at this stage if BF does not come through? I suppose that if we choose to take official action, sooner is better than later.
 
Status
Not open for further replies.