[linux-dvb] Re: PCB for J2 on DVB-S 1.3 upto 1.6

[Holger Waechtler <holger@convergence.de>]

Dr. Werner Fink wrote:
> Hi,
>
>      just done with the simple program pcb 1.6.3 under linux.
> A simple PCB which includes also a S/P-DIF out for RCS/BNC (which
> I've found at http://www.epanorama.net/documents/audio/spdif.html)
> and some filters for RGB.
wow! sounds cool, do you have a place where you can host this project?

> Some problems remains: What is the appropiate replacement
> for a G2.3-FT12 (or G2/3-FT12) ... at www.reichelt.de
> I've found `FT 23-77', `FT 23-61', and `FT 23-43' with
> specs but I do not have specs of `G2.3-FT12' for comparision.
> Ans also the I do not know if the 74HCU04 from Philips
> can be replaced with `74HC 04' or `74AC 04'.
You can do so as long the chips meet your timing requirements. Just 
compare the datasheets, if the new chips are faster and can stand at 
least the same ratings you are usually on the safe side.

> At www.epanorama.net only four of the six inverters of
> the 74HCU04 are used.  the question rises what to do with
> the other two one (pull down to GND I guess).
correct.

> At least a low cost pcb service which takes the ASCII or
> the Gerber/RS-274X format pcb 1.6.3 would be a win.
http://www.pcbpool.de/de_index.htm is pretty cheap for 2sided boards and 
delivers decent quality.

http://www.pcbexpress.com/ promises much faster service at the same 
price and is much cheaper for 4layer boards. Check your Gerber files 
that they meet the requirements of the board manufacturer, gerbv is a 
nice tool to do so.

There are many other PCB manufacturers on the web, just google a little 
around...

Holger



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