You can't find an inverting Gainclone with high quality input buffer DC-servo, power supply, fuses(!), and rectifier bridge.... my concept is pretty unigue.Pedja said:
peranders said:
Really,I agree with you.
We should be happpy that have chance to process own design into real PCB boards.
peranders said:
Maby without servo it would be even better.😀
Have you tried removing it?
Have you made tests before "offering" the PCB, or is this your first GC?
I have made a Gainclone before and also offered a group buy. Have you missed that? That GC was made only with holemounted parts. Both my GC designs are taken directly from my mind into the computer without any prototyping at all. I used the "big-bang" method. I have not explored all options and I'll leave this to the builders.... they have to do something by themselves 😀
I think though that most builders will prefer a totally hump free, offset free amp with a clean bass.
I think though that most builders will prefer a totally hump free, offset free amp with a clean bass.
peranders said:
So you can't say if it's good or not.
Only the people who have tried several implementations and try yours can report, and those people's oppinion will be taken into account, at least by me.
Coming from you, it always seams like commercial talk, because you sell it.
You are free to say what you want on your thread, but you should not walk around making publicity of your design.
I hope you understand my point of view.
To all, have in mind that what makes this forum alive are not the moderators, it's the members.
The members are those who put content here, interesting stuff or not, and turn this forum into an interesting place.
Unfortunately, on the last year we ave been loosing very valuable members, due to nonsense attacks and disputes coming from those who are here to sell their things.
Fred Dieckmann, Eric (Mr. Feedback), and many others are missed here, this place is getting dominated by stagnation and kit sellers.
IMHO.
Carlos, peranders make it like " one water wash ", 'cos his knowledges are deep. Maybe it is not your method, but some use this solutions 😀 ( with very well results 😉 ).
Is it good because I say so? Hardly. You must create an opinion of your own. I can say as much as this: I have not become dissappointed so far and if I say that nor have those who have built my things, copied or not. I looks like marketing BS but test my stuff first and then come back. "Somebody" has dismissed my stuff unseen, unheard. He may have the truth.carlosfm said:
People here are intelligent and can filter information and there are different tastes and certainly no absolute truths.
Per, guys can listen about Caddocks and Black Gate, which make " listenable " amp - normal 805 aren't plenty posh 😀 .
yes... but those 805 are much much smaller.Upupa Epops said:
I bet there are guys who would pay for bg just because they are afraid of 805.
Most DIY'ers fear SMD. Designing a SMD amp is a sure way to make it not very popular but as most of you already know, I think SMD is cool. I like it and have no problems with it not even with soldering by hand.
To peranders : I mean, that most of DIY'ers are technologicaly two generation back - on middle of seventy's - big devices, big holes, all wire soldered, any connectors 😀 .
Upupa Epops said:
Of couse you had to come.
Of course your knowledges are also "deep".
That doesn't mean that you can pick an LM chip and make the better out of it at the first time.
Yes, with fuses (!), it is most unique. And of course, the buffers used before were the low quality ones.peranders said:
Now, I’ll withdraw from this thread.
Pedja
While I agree there are people on this forum who are here only for business, I don't think everybody who does business is here only for business.
I particulary don't agree attacking some nice design without testing it. And I think about carlosfm:
I for one sure like the idea of having almost now DC going into my speakers. I have now around 70mV DC on the current brian gc, which is kinda too much, altho some keep saying it is ok. As I heard the DC servo is optional, so the people (and you carlos) will be able to test with and without it and make up their mind. I don't really trust 100% what peranders says, nor do I trust the beta testers, nor anyone else from this board, but at least I'll be able to build such an amp for a very decent cost and if it blows it blows, I'll throw away the boards and still have the components for other projects.
I also ordered 2xchip boards and 2xregulator boards from digi so I will have one more reference. The best I'll keep, the others I'll ebay or just forget about them.
Of course I can only say it suxxxxxx not to be able to buy boards from Pedja, but that's it.
I particulary don't agree attacking some nice design without testing it. And I think about carlosfm:
While I agree with carlos on some points, and he does agree with me over one point(another thread), I don't agree with this. I always liked fair, and fair in this case means test first comment later. If I remember right I commented once on brian's gc kit but only comparing to what I had and listened to. When the smd chipamp will be ready I will eventually comment on it comparing it to what I had. Everything is relative, there are lots of factors to be considered, the speakers are extremely mportant, the speakers cables are too, source, preamp, everything is important. I don't think my system is good enough for comparison and I don't know whether your system carlos is the best either, or peranders's system in that respect. A fair comparison would be multiple chip amps on the same system. That would be fair. That's why carlos, you have to try this smd amp for yourself in your system.
I for one sure like the idea of having almost now DC going into my speakers. I have now around 70mV DC on the current brian gc, which is kinda too much, altho some keep saying it is ok. As I heard the DC servo is optional, so the people (and you carlos) will be able to test with and without it and make up their mind. I don't really trust 100% what peranders says, nor do I trust the beta testers, nor anyone else from this board, but at least I'll be able to build such an amp for a very decent cost and if it blows it blows, I'll throw away the boards and still have the components for other projects.
I also ordered 2xchip boards and 2xregulator boards from digi so I will have one more reference. The best I'll keep, the others I'll ebay or just forget about them.
Of course I can only say it suxxxxxx not to be able to buy boards from Pedja, but that's it.
roibm said:
Did you see an attack to the design on my post?😱
I just said that it's natural that who sells a particular PCB says it is the best, or revolutionary, or different, or whatever.
Of course this is like reading a manufacturer's catalog.
I said that those words may be taken into account if reported by the people who have tried it, and also other implementations / designs, not by who is selling it.
I think this is obvious, and it's one of the reasons that I see, from around a year ago, the forum progressively stagnating.
Because the valuable members that most contributed are progressively leaving.
Sorry, it's my oppinion.
EDIT:
If this follows this path, nobody will post schematics anymore.
Instead, everybody presents PCBs for sell, with new ideas or not.
This may turn one day as going to the Velleman web site.😀
Well, I consider it an attack, others may just consider it harsh. You may consider it however you want.carlosfm said:
I'd be really happy to see you carlos test this SMD chip amp. To bad I got only 2 boards. I would have had 4 I would have shipped two to you just to try them out.
roibm, I think it's good that you don't believe in everything I say, why should you?
Walter and Anders like their amps but this doesn't mean anything really.
About disconnecting the DC-servo. If you do that as the design is you might get a rather heavy offset if you are unlucky but this is a random phenomenia. You may have to add a coupling capacitor (rather big and no room for it) and/or change the feedback values.
It's very easy just to disconnect the servo. If the offset voltage is under control (less than 50 mV) it's no harm in doing that.
When starts the offset voltage to interfere? Some claims 50 mV, other claims 100 mV. I'll guess this is very dependent of the speakers.
Walter and Anders like their amps but this doesn't mean anything really.
About disconnecting the DC-servo. If you do that as the design is you might get a rather heavy offset if you are unlucky but this is a random phenomenia. You may have to add a coupling capacitor (rather big and no room for it) and/or change the feedback values.
It's very easy just to disconnect the servo. If the offset voltage is under control (less than 50 mV) it's no harm in doing that.
When starts the offset voltage to interfere? Some claims 50 mV, other claims 100 mV. I'll guess this is very dependent of the speakers.
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