PCBs for Aleph30 & Aleph L !

[panos29]

O.K, Here u are, these are my PCBs for an aleph variant for everybody.
The Aleph L pcbs are the initial once not tested yet as i am in the process of adding a volume control and an input selector(digitiged driven relay stepped attenuator as the one in aleph P, and source selector using relays, my design).
Here u get the aleph-pcb and 2 masks that are the same, but made in 2 ways to be easier viewed.

I am sorry that the files are a not posted directly here but these are bit big but it was impossible to reduce the size due to the high resolution used in order to create a workable, printable copy.

http://briefcase.yahoo.com/bc/panos2...view=l&.last=1

[scrazy]

good work!
but what resolution should be when printing these pcbs ?
or what the actual size of thease pcbs?
thanks

[panos29]

the dimensions are 20,26 X 9,84cm , resolution is 300,125 dpi

Anyway its printed in the correct size if u have a laser or a jet printer with 300dpi resolution, i use a HP 940c deskjet.
The output copy is perfect for creating the actull pcb.

Panos

[Mark A. Gulbrandsen]

Escellent job! I may just rebuild my Aleph L with your PCB next weekend. Its a much better job than the hand layout I did.
Thanks,
Mark Gulbrandsen
Salt Lake City

[pa]

Hi !

Nice Job ! congratulations...
on the "work" pictures i've seen your power supply using 2 capacitors, not 10000uF ? what is the value ? could you give me more info or graphic...

I have 2 nice 22000uF 63v electolytics maybe ... :-)

Thanks in advance for your help...
Pa

[panos29]

Thanks for the good comments!
these 2 caps are sprague 100.000ìf /30v moreover there are 2 bolted rectifiers rated at 30A/200v

Panos

[pa]

Hi !

So, your power supply capacitance is a bit different compared to an original A30, and I have seen only four 0.47 resistors for R22-R27 instead of 6, do you try some other personnal modifications ? does it sounds different ?
Tia
Pa

[lohk]

Panos,

very good work !

But why did not you save it as a GIF file - this works much better for graphics as the jpg, which is designed for fotos.
A GIF will be better in quality and much smaller.
PDF or postscript files should also be better.
All these conversions are done very easily with freeware programs.

regards
Klaus

[lohk]

Add. file size and format:

Specially the L-pcb file suffered quite much by being saved as a jpg.
And converting it to b/w gif it will be 8 times smaller.

The Aleph30pcb is quite OK.

You surely did the layout work with a vector or a pcb design program, didn't you ?
So please, try to save it as a verctor file (like wmf, which would be best) or a graphic file (like a big scale b/w gif).
Another possiblity would be to save it as a postscript file (print it to a postscript printer as a file) or a pdf (best, because is will be in the right size and everbody can read it).

If you need help, send me a mail.

Klaus

[panos29]

Dear Pa, there are 6 X 0,47ohm output resistors in my current layout. Only my old pcb had 4 as it was a copy of the aleph 3 and not the aleph30.

Dear klaus the program i use is an ancient one, but i know it very well to change it now. The aleph30 pcb was transfered to another one in order to save it as a bmp. But this was very difficult to do it as "boardmaker by tsien labs"(the old) has millions of save settings that i am not familiar with, so i cannot save it to other formats. Even trying to save it in gerber or postcript is very fuzzy. If u are familiar with all these i am open to any help so i can convert these to easier formats as gif. I can email u a copy of boradmaker if u can help(its very small and dos based). The aleph L is just a scan of the actuall printout thisfore is so bad, though workable.

Any help or modifications to my layouts are more than welcomed

Panos

P.S The next one to follow is the aleph L with stepped attenuator as the aleph P volume control (for the time i am waiting for the prototype to test the functionality, when done i will post it.