I'm really looking forward to build this amp and I've already started to think about a suitable enclosure. I would help if someone has the dimensions of the PCB?
/Fredrik
/Fredrik
Upupa Epops said:
Hi Pavel,
Sorry to be a little off topic, but I'd like to know a little more about the use of the word "raster". I've only recently worked out what it means in reference to PCB design as it is used as a variable in some of Eagle's ULP programs which are mainly written and commented in german. I now think of "raster" meaning "grid spacing".
The english dictionary meaning is a little different. 😕
http://dictionary.reference.com/browse/raster
It seems like it is one of those words english has borrowed from another language, but made the meaning more a lot more specific. I'm interested in the "real" meaning.
thanks
Greg Erskine said:
Hi Greg,
you are right, raster = grid.
http://www.dict.cc/deutsch-englisch/Raster.html
best, LC
have a look:
http://dict.leo.org/ende?lp=ende&la...tHdr=on&spellToler=on&search=raster&relink=on
in eagle it would mean grid spacing
regards
http://dict.leo.org/ende?lp=ende&la...tHdr=on&spellToler=on&search=raster&relink=on
in eagle it would mean grid spacing
regards
Hi Greg,
as you know, I'm living in Europe and we use here metric system. Everybody have here in work-room " tools " with metric scale and make things in inch rate is at least little bit problematic ( I mean DIY things ). I know, the same problem is in oposite " look " 😎 , but in this concrete case I hope, that " We shall overcome... " 😉
Cheers,
Pavel
as you know, I'm living in Europe and we use here metric system. Everybody have here in work-room " tools " with metric scale and make things in inch rate is at least little bit problematic ( I mean DIY things ). I know, the same problem is in oposite " look " 😎 , but in this concrete case I hope, that " We shall overcome... " 😉
Cheers,
Pavel
Thanks all for the information. I'm glad I was on the right track. 😉
Hi Pavel,
In Australia, we changed from Imperial to the metric system in the 60's or 70's. So I can work in both, but after years of using metric, the logic behind the Imperial system seems hard to comprehend. Lots of our basic tools still have "both" sets of measurements.
If my understanding is correct, PCB layout software still works on a Imperial raster of usually 1/10 of an inch, but you can set the the software to display in metric.
Sorry of the OT.
regards
Hi Pavel,
In Australia, we changed from Imperial to the metric system in the 60's or 70's. So I can work in both, but after years of using metric, the logic behind the Imperial system seems hard to comprehend. Lots of our basic tools still have "both" sets of measurements.
If my understanding is correct, PCB layout software still works on a Imperial raster of usually 1/10 of an inch, but you can set the the software to display in metric.
Sorry of the OT.
regards
No Greg, you can switch sofware to both systems. Some devices have metric spacing, some in inches, but you have them in library, it is not problem. But you must rememer at fitting of PCB into the chassis and don't have some " wild " dimensions....
Upupa Epops said:
Yeah Pavel, you are right. Thanks. I never thought about it closely enough. Also, a very good point about spacing the mounting holes on PCBs to a metric grid, I would have fallen for that.
regards
I've just read the manual of PA03, very good work and easy to understand! I'm very glad I joined the group buy.
I'm planning to use OPA627 based preamp (elector) which requires +-15 VDC, would it be advisable to use the PA03 module to supply the preamp, or is the DC out signal just to control relays at auxilary units?
Regards
Fredrik
I'm planning to use OPA627 based preamp (elector) which requires +-15 VDC, would it be advisable to use the PA03 module to supply the preamp, or is the DC out signal just to control relays at auxilary units?
Regards
Fredrik
DC current limit at " output " is given only by power dissipation of zener diode, which is connected in series with voltage regulator, i.e. preamp will be not problem...
One notice : at connector are signal and PS grounds separated and this configuration you must keep also at preamp....
Is interesting for me to observe interest of all world about DIY activity - I'm sorry, but I have no feedback about this thema within P-A's activity. ... So I see : South America : practical zero... Black continent : zero ... China : zero...Japan : zero...Arabian countries : zero ( no comment )...Russian : zero...Pinguins : zero
😉
Can somebody to explain me this situation ?
😉
Can somebody to explain me this situation ?
You want feedback? I can't think of something to say that has not been said before. The design looks well thought through. Good layout. Everything's in place to assure a high quality final product.
Can't say more until I get the boards. Except, of course, thanks Pavel and Per-Anders for sharing this design effort with the world and for making the boards available to us. Really saves me many hours of PCB design work and development.
Cheers
Can't say more until I get the boards. Except, of course, thanks Pavel and Per-Anders for sharing this design effort with the world and for making the boards available to us. Really saves me many hours of PCB design work and development.
Cheers
I'll guess I missunderstood a bit but it's true that I haven't got many questions abiut the amp but I'm sure there will be more when people start to build.
