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Old 27th June 2012, 08:22 PM   #1
Boscoe is offline Boscoe  United Kingdom
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Default LME49830 PCB...

I know Opc has done the Wire which was very popular but I enjoy doing my layouts and I also think the LME49830 makes a very good amplifier so I'm thinking of getting these boards made for myself and selling the rest I don't need.

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Old 27th June 2012, 08:29 PM   #2
Zen Mod is offline Zen Mod  Serbia
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neat

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Old 27th June 2012, 08:52 PM   #3
alex mm is online now alex mm  Europe
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Hi Boscoe , IMHO
1. I don't like insects (SMD) , not so many parts , you can use TH components.
2. Heatsink if it's black line on pic , it's small, and too close to elyt caps .
3. No need to layout with dual layers (just few resistors and capacitors ) .
Some connections : clip led , muting switch are missing from PCB , and worst the OT are fake
Regards Alex.

Last edited by alex mm; 27th June 2012 at 09:04 PM.
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Old 28th June 2012, 04:41 AM   #4
qusp is offline qusp  Australia
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there is zero objectively (and subjectively to me) wrong with SMD for the positions hes used them for, quite the contrary they are the better part for the job. some people will be unable to build an amplifier for themselves with available parts before they accept SMD and trust me, that time is coming

neat layout Boscoe!

also, I thought insects had many legs?

Last edited by qusp; 28th June 2012 at 04:44 AM.
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Old 28th June 2012, 06:53 AM   #5
Boscoe is offline Boscoe  United Kingdom
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Thanks for the feedback.

I like the SMD and don't like SMD because of their pads, I can go underneath them but can't use them as vias!

I will change the sink as I was being a bit lazy and didn't want to draw one I could find on the net as there aren't any appropriate ones in the eagle library, as well as a lot of other things!

I didn't add mute and input coupling be cause I don't like the complexity with them. The user can put some massive 1000000V audiophile tube cap on there if they want!

There's a couple of mistakes on there which I'll try and correct and I may get this sent off to be made in the next couple of weeks due to m starting a new job!
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Old 30th June 2012, 04:00 PM   #6
Nisbeth is offline Nisbeth  Denmark
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Interested if you have boards left over. Which FETs do you use on the output and can you include a schematic here please?.

/U.
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Old 30th June 2012, 04:06 PM   #7
Boscoe is offline Boscoe  United Kingdom
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Outputs are:

http://products.semelab-tt.com/pdf/m...0ALF16N20W.pdf

and

http://products.semelab-tt.com/pdf/m...0ALF16P20W.pdf

I have been working off paper so I'll get something drawn up.
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Old 1st July 2012, 09:02 AM   #8
effebi is offline effebi  Italy
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Great job. And I fully support your use of SMD components. And not I am not young and not newbie. I did my first traditional PCB around 1977 but from about 5 years I understood that it is defenetly time to change.
Anyway...
I see that probably you have done it in Eagle.
Would you mind to share the 49830 symbol?.
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Old 1st July 2012, 10:25 AM   #9
Boscoe is offline Boscoe  United Kingdom
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Thanks for your replies. I'm sorry I don't have the footprint for it I just used vias and went by the pin spacing detailed in the back of the data sheet. You can make then quite easily tho. Sorry but everything is gonna be delayed a week due to me moving to London!
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Old 5th July 2012, 06:52 AM   #10
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LME49810.lbr
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