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Industrial SMD Gainclone - group buy

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#81
money changes everything

BrianGT said:
I am confused. What are the beta conditions? I didn't see them mentioned in this thread.
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They are mentioned on the Wiki-page, though.
P-A charges his beta-testers money, which he promises to pay back,
in case the boards are built and tested within a certain time.

This rather unusual way of dealing with beta-testers has led to long arguments in earlier threads, especially with Fred Dieckmann (whose contributions are still missed by SOME members here...)

Btw, Brian, you could have made a FORTUNE this way: Imagine all your customers who haven't finished (or even begun) building their gainclones... Charge them! 😀 😀 😀

sek said:
I just cannot accept your beta-test conditions, as I already explained.
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Threr are other nice gainclones around, right?
 
#82
peranders said:

This is low budget so you have to actually pay me, then after completed task will get rewarded. I know the nature of people so they must have some pressure to actually perform. Money is good for that purpose.

Experience from my QRP01 project tells me that some people are very fast in building and others are really slow (no result yet...). The purpose of the beta testers is to really get results in a give time.
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#83
Michi124, Peter Daniel has quoted me right. I invest in a prototype batch and I can't afford not to get nothing back. Some blackmail/rewards are good I think. It's a good deal becuase if you really are going to keep your promises I'll keep mine.

If this shall be a low budget/profit project the prototyping must be financed also.
 
#85
sek said:


Well, that's not true for me.

I just cannot accept your beta-test conditions, as I already explained.
In case you don't want to think about it again (I already explained my points, as I said), my set of beta-boards is available again for someone else who is willing and wealthy enough to afford them!
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I'll guess you are out then.

If you manage to build a stereo Gainclone before Christmas you will have the pcb's for free AND get a reward. To be in this test group is completely voluntary, so I'll guess you'll have to wait a few months for your pcb's but I really hope that I can have good results in less than a month.

But if you are willing to put something into this you can also gain something.
 
#86
Re: Re: money changes everything

peranders said:
Peter Daniel has quoted me right. I invest in a prototype batch and I can't afford not to get nothing back. Some blackmail/rewards are good I think. It's a good deal becuase if you really are going to keep your promises I'll keep mine.

If this shall be a low budget/profit project the prototyping must be financed also.
Click to expand...


peranders said:

Indeed, but none like mine 🙂 and it may not be a thing better than Brian's/Peter's, soon we will have an answer.
Click to expand...

Sounds like a decent plan. I hope things work out well. It is nice to see more options for DIYers to build gainclones.

--
Brian
 
#87
I'm rather concerned that more than one prototype is built before I push the big button. I'm pretty convinced that it will be good or even excellent but this conclusion can't be made by building only one prototype.

I'll hope Walter (gewa), Anders (AndyB) and Henry (byteboy) will succeed and give their point of views before the other have their pcb's.

I'm very curious how their amps will look like.
 
#88
I've been busy 🙂 Only a few parts are left to solder. It took me approx. one hour so this is maybe an indicator of how hard it is to solder. In fact it's rather easy. Some parts are missing and I must order so I'll guess I'll continue this at Friday. Need I say that this board is looking real cute :nod:
 
#89
Today I'm gonna place my order for all the parts. I'll gues by the end of next week they will be in. Shipping is usual 5 to 10 days.
Still haven't found the inductor dough. I think I will have to make it myself from some insulated transformer wire. P-A, does the completed amplifier have to look "showroom" good or is a prototype finish OK (see pic of my first GainClone). Still haven't figured out if I will use one transformer for both channels or give left and right one each.

Cheers

Walter
 

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#90
The design is a mono block so if you can afford two transformers, this is the best in every way. The grounding will be non-critical since everything are on the pcb. I really recommend two transformers for this particular project.

I can make the inductor for you. I have the wire for it.

The finished amp must work, that's the main thing and if it's nice looking is a plus of course. If it is going to look like the one in your picture, you don't have to worry a thing.

Just for your information, today Monday I posted your pcb's. The mailbox was emptied 17.00 (5 pm).
 
#91
Hi P-A

OK, two transformers it will be. A 225VA per channel will be more than adequate I think.

If you want to make the inductor and send it to me, be my guest.
Just finished my order at Digi-Key.

It's time to go to bed now.:xeye:

Cheers

Walter
 
#96
Hi Peranders-

So is that voltage regulation and buffer "on board"?

So literally all you need in a pwr x-former and your 'ret-to-go?

Neat project but if your going to do a buffer on board, why not have placement for 2 LM3886's and have the option for parallel, bridge or stereo amp on one board?

That is the project I am currently working. If you had done that I would have a whole lot more free time 🙂.

Thanks again,

Troy
 
#100
Hi P-A

Just a thought: if you reduce the space for the big power cap's and loose the option of the choice in diodes you can make the final version of the PCB even smaller. Don't quite understand the purpose of the MUR3020 diode in the current setup.

Cheers

Walter
 
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