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Old 19th October 2013, 05:16 PM   #31
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Henrik76 View Post

I was hoping just to buy some kit off ebay ...
I don't know about ebay

but you can check aussie amps
not cheap, but works

Aussie Amplifiers - diyAudio
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Old 19th October 2013, 05:36 PM   #32
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The best, low cost and trouble free way of getting into solid state audio is with a Chip-amp. This is a sure-fire way to good sound quality that just gets better as your design and assembly skills improve. I support DIY all the way because that is what this forum and the kit sellers here, are about, in as many ways as possible.

However, I can also understand noobs wanting to get started right now without the hassles of learning to lay out PCBs properly. Some of us never get proficient or enthusiastic enough to want to carefully etch and drill PCBs every time we want to make a project.

I suggest you read some threads in the Chipamp forum, follow up on the parts and kit sources at the commercial forums like Audiosector and Chipamp and look at the illustrations, manuals etc. They are great products, compact and attractive.

Then, satisfy your curiosity with all the Ebay chipamp kits based on LM3886, LM3875, TDA7294, LM1875 etc. There's lots out there and quite cheap, even if the design and support is not near as good as our own, if I do say so!
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Last edited by Ian Finch; 19th October 2013 at 05:39 PM.
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Old 19th October 2013, 06:04 PM   #33
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Quote:
Originally Posted by Henrik76 View Post
Thank you all.
It will be my first DYI solid state amp, although I have built a few tube amps. I was hoping just to buy some kit off ebay, but there are so many designs and I have no idea which is better suited to the components I plan to re-use (transformers and case). The one that John Bali is referring to - is that available as a kit, with the board already printed and all components in a package? I don't mind loading the boards myself, but it would be great to be able to buy as a kit.

regards
Henrik
Henrik, sorry no kit from me.
But Lazy Cat do: :
VSSA Lateral MosFet Amplifier
But I don't know if that one suit with all you have.
It is also not trouble free
Maybe you try chip amp as Ian Finch say, they are easiest one, you even build by PtP

Regards
John
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Old 18th July 2014, 07:59 AM   #34
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Quote:
Originally Posted by Henrik76 View Post
Hi all!
New member, Henrik from Norway here.
I have some electronics experience building my own tube amps for guitar, but I've never built a solid state hifi amp..... I have an old DOXA (Norwegian small-scale manufacturer) power amp, which is very old-school class A. It runs very hot, it hums and it hasn't got a lot of power. What it does have, though, is a massive power supply; ... Cheers!
Henrik
Hi Henrik ! i hope you will see this reply
I have two questions about your amp:
1) which model is ?
2) have you tried reducing the bias ? maybe you will get less heat and more or less same sound

Then i have another question. Do you now the Doxa Model 40 ?
does it sound ok ?
I am sorry ... i should have read all the 3d before asking but i have an offer
Thanks a lot.
Kind regards, gino
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Old 18th July 2014, 08:18 AM   #35
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Quote:
Originally Posted by KatieandDad View Post
Those heatsinks would work far better if the fins were vertical
Hi and just to say that i agree completely
About cooling there is one thing that i sincerely do not understand
Thanks to pc technology there are fan nowadays that are unbelievably silent
Please if someone can give me a reason not to use them
I see the output transistors mounted in a sort of chimney with internal fins with a silent fan on top or on the bottom
Maybe if the chimney is long and placed vertically it could work fine even without fan, just for natural convection
But i am not an engineer .. well i am not a good one i mean
Thanks and regards, gino
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Old 18th July 2014, 10:12 AM   #36
AndrewT is online now AndrewT  Scotland
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