Hi Tim !
Can you show with a pic what pads you mean ?
Pavel is more experienced with that, he knows how to get boards produced from eagle files, maybe he can help you.
I guess this third layer is a cutting information.
Mike
Can you show with a pic what pads you mean ?
Pavel is more experienced with that, he knows how to get boards produced from eagle files, maybe he can help you.
I guess this third layer is a cutting information.
Mike
The layers seen in the Eagle *.brd file are not directly used for production. The production files must be created for example by gerber274x.cam (top and bottom film) and excellon.cam (drill). These production files are created from the *.brd file. You get many files with same name and different extension by this process. You will need *.drl, *.drd, *.cmp, *.sol, *.sts and *.stc files for double-sided PCB. Only top (red) and bottom (blue) layers of the *.brd file should be observed to see how produced PCB will look like. For additional questions please read Eagle manual, it can be downloaded from CadSoft website.
Thanks Mike and Pavel.
Pavel: Yes, I was able to produce Gerber and Excellon files from Eagle. Do you know why we need the 'pad's for components on the top layer from the Gerber files? Just like to know if there is anything significant that I missed. (They are of course also on the bottom layer too).
Pavel: Yes, I was able to produce Gerber and Excellon files from Eagle. Do you know why we need the 'pad's for components on the top layer from the Gerber files? Just like to know if there is anything significant that I missed. (They are of course also on the bottom layer too).
tttking said:
Hi Tim,
Would you think about doing maybe a small group buy on those boards? I wouldn't mind sharing in some of the expense to get a couple of good boards. I'm in the LA area.
Blessings, Terry
Pavel, thanks for the reply. What I did not understand was that why we have those pads on the top component layer too? Isn't the bottom circuit layer enough? They certainly wouldn't hurt though.
Did you find SYMASYM5 sounding better at a higher biase of about 150-170 ma? If so, how does the sound differ?
Terry, I am thinking about order PCB's from WWW.PCBEX.COM They charge $10 per piece (single channel) with a minimum order of 5, plus $18 shipping. That will be $68 for 5 and $78 for 6. Maybe we can order and split the cost.
MikeB, I meant what's on the component side did not seem to be necessary other than the jump wires. I have attached the component layer from the Gerber file that I generated from BRD.
Did you find SYMASYM5 sounding better at a higher biase of about 150-170 ma? If so, how does the sound differ?
Terry, I am thinking about order PCB's from WWW.PCBEX.COM They charge $10 per piece (single channel) with a minimum order of 5, plus $18 shipping. That will be $68 for 5 and $78 for 6. Maybe we can order and split the cost.
MikeB, I meant what's on the component side did not seem to be necessary other than the jump wires. I have attached the component layer from the Gerber file that I generated from BRD.
Attachments
Hi tttking,
By default Eagle generates a double-sided PCBs.
I guess, if you ask for a single-sided PCB the manufacturer will ignore layer 1. If you ask for a double-sided PCB you will have pads on the top and bottom plus the "links" will actually be tracks on the top.
I think it is normal on double-sided PCBs to have a pad on top and a pad on the bottom with thru-hole plating.
Generally, if you design a single-sided PCB you would probably have larger pads so they don't lift when soldering (or resoldering).
Regards
By default Eagle generates a double-sided PCBs.
I guess, if you ask for a single-sided PCB the manufacturer will ignore layer 1. If you ask for a double-sided PCB you will have pads on the top and bottom plus the "links" will actually be tracks on the top.
I think it is normal on double-sided PCBs to have a pad on top and a pad on the bottom with thru-hole plating.
Generally, if you design a single-sided PCB you would probably have larger pads so they don't lift when soldering (or resoldering).
Regards
Greg, thank you for your explanation. I understand it now. I am more familiar with utilizing the component side layer as ground plane instead.
Greg Erskine said:
Correct.
And *.sts, *.stc files I spoke about are solder stops (non- solder mask data). You do not need them if you do not want non-solder mask.
Keep some alphabet label at the bottom side for the manufacturer to be sure of film orientation.
Anyway, I would recommend double-sided PCB. As there are metal through-holes, the PCB is very rugged and resistant to common DIY solder/desolder actions due to often mistakes.
I' just received printed board this week.
Now i' will buy components to built the amplifier.
I' can not found the toshiba output devices: any idee of way to buy it?
Which prices ?
When you switch on this power amp is there some noise in speaker?
Is it necessary to put a relay on output even if compression is used in direct coupling?
Thanks to answer
JC BALTHAZARD
Now i' will buy components to built the amplifier.
I' can not found the toshiba output devices: any idee of way to buy it?
Which prices ?
When you switch on this power amp is there some noise in speaker?
Is it necessary to put a relay on output even if compression is used in direct coupling?
Thanks to answer
JC BALTHAZARD
Hi Balthazard !
You don't need an outputrelay for delayed turn on, the amp does not create audible or visible thump when turned on/off. When powering down, you might turn off signalsource first, because of lowered supplyvoltage symasym starts clipping after few seconds which sounds very distorted.
I do not understand your "compression is used in direct coupling" ?
About getting components, as you live in EU, it should be easy to get all these parts. For the Toshibas you might try www.profusionplc.com , it's in UK. At www.digikey.com you get ALL transistors needed for symasym, but that's an oversea order and has some extra costs. If you have a friend in germany he could buy all other parts at www.reichelt.de.
Board layout was done for the parts i get at reichelt.
The normal prices for the Toshibas are ~1.4-2Euro each.
Have fun,
Mike
You don't need an outputrelay for delayed turn on, the amp does not create audible or visible thump when turned on/off. When powering down, you might turn off signalsource first, because of lowered supplyvoltage symasym starts clipping after few seconds which sounds very distorted.
I do not understand your "compression is used in direct coupling" ?
About getting components, as you live in EU, it should be easy to get all these parts. For the Toshibas you might try www.profusionplc.com , it's in UK. At www.digikey.com you get ALL transistors needed for symasym, but that's an oversea order and has some extra costs. If you have a friend in germany he could buy all other parts at www.reichelt.de.
Board layout was done for the parts i get at reichelt.
The normal prices for the Toshibas are ~1.4-2Euro each.
Have fun,
Mike
Thank you Mike for your prompt reply,
I think by direct coupling compression-horn-driver connected whithout passif crossover .
I think by direct coupling compression-horn-driver connected whithout passif crossover .
What is the matter?
Hei guys
I'm surprised that nobody does any follow up reagarding the
high power Sym!...
What is the matter , is nobody interested in that super amp?
I am, so I'm plugging for that KillerSym (notice that I've changed
the name at Mike's suggestion), so let's talk about it, symasym
is not dead (by no means) but the new Killersym should be very much alive at this time.
Well, I understand, everybody is afraid of this amplifier, I'm not,
I wish I had the knowledge to expand some technical considerations about it.
Or should we create another thread just for that?
Ok, I'm done with my rambling, that's up to you guys to resume
the conversation....
Hei guys
I'm surprised that nobody does any follow up reagarding the
high power Sym!...
What is the matter , is nobody interested in that super amp?
I am, so I'm plugging for that KillerSym (notice that I've changed
the name at Mike's suggestion), so let's talk about it, symasym
is not dead (by no means) but the new Killersym should be very much alive at this time.
Well, I understand, everybody is afraid of this amplifier, I'm not,
I wish I had the knowledge to expand some technical considerations about it.
Or should we create another thread just for that?
Ok, I'm done with my rambling, that's up to you guys to resume
the conversation....
Hi jmateus,
I am very interested in a higher power version. I feel Mike needs so breathing room. When this kicks off, I'd rather it be in a new thread to cut the confusion this will cause in this thread.
In no way am I afraid of a higher power amp. I do think that 250W is a rather large step at first, but Mike will be the judge of that. Many members may only require a power of 150W to do some damage. I imagine some largish cost difference as the power increments upward.
-Chris (Go Mike Go!)
I am very interested in a higher power version. I feel Mike needs so breathing room. When this kicks off, I'd rather it be in a new thread to cut the confusion this will cause in this thread.
In no way am I afraid of a higher power amp. I do think that 250W is a rather large step at first, but Mike will be the judge of that. Many members may only require a power of 150W to do some damage. I imagine some largish cost difference as the power increments upward.
-Chris (Go Mike Go!)
tttking said:
Hi Tim,
How many boards where you planning to use for yourself? I'm not sure how many I will actually need but three would be a weird amount. 😀 Maybe someone else would be interested as well so we could split them up more evenly. I suppose I could do with 4 boards if you wanted to order 8. Anyway, let's see if others want to join in. I'm presently etching one more pair to see if i can figure out what I did wrong. I'd love to do a final set on good boards with masking. If they sound as good as I think it will with a proper power supply this will be a great amp to give as a gift.
Blessings, Terry
Hi Terry:
I will be happy to order 6 and split 1/3 and 2/3 with you on cost with 2 boards for me and 4 for you. I am a little un-at-ease with my gerber files. Let me ask Pavel and Greg to double check first.
Hello Pavel and Greg:
Would you please be so king to review my Gerber files here and give me some advice? I am worried about the Gerber files that I generated with Eagle gerb274x.cam. The .sol picture seems to be flipped from what I see in Eagle, therefore the image from .cmp and .sol no longer match each other in VIEWMATE display. Is that normal? Did I do anything wrong? Please refer to the Gerber files I attach here. Would you also ckeck the .DRI and .DRD files, if you can. Thank you.
I will be happy to order 6 and split 1/3 and 2/3 with you on cost with 2 boards for me and 4 for you. I am a little un-at-ease with my gerber files. Let me ask Pavel and Greg to double check first.
Hello Pavel and Greg:
Would you please be so king to review my Gerber files here and give me some advice? I am worried about the Gerber files that I generated with Eagle gerb274x.cam. The .sol picture seems to be flipped from what I see in Eagle, therefore the image from .cmp and .sol no longer match each other in VIEWMATE display. Is that normal? Did I do anything wrong? Please refer to the Gerber files I attach here. Would you also ckeck the .DRI and .DRD files, if you can. Thank you.
higher sysmasym....
I am waiting to see the higher power sysmasym as well. But, I dont think we need another thread for this. In fact any diy amp should be able to move from low power to high power. This is one of the attributes of a good audio amp.😎 😎 😎
I am waiting to see the higher power sysmasym as well. But, I dont think we need another thread for this. In fact any diy amp should be able to move from low power to high power. This is one of the attributes of a good audio amp.😎 😎 😎
Hi tttking,
Sorry, I don't have much experience with gerber files or Viewmate, so I can't offer any help.
regards
Sorry, I don't have much experience with gerber files or Viewmate, so I can't offer any help.
regards