Post by thread:packet radio modem [OT]

part 0 821 bytes I tried without luck to open the file that you post (modem.zip) seems to be bugged, if you can, send it to my personal address to avoid extra traffic on piclist that is already heavy :-). The other modem with 4046 & 4049 never heard about it (?). I don't know exactly for what are you needed this modem, the XR2211 & 2206 works very good between 300 and 1200, and acceptable at 2400 baud, but if you need more speed, or high noise inmunity you may consider to change to MX GMSK chips (expensive and difficult to adjust), or MANCHESTER modem (very stable but uses a lot of bandwidth). I hope it helps, see you. Attachment converted: birth:Exardmod.gif (GIFf/JVWR) (000084D9) Leandro J. Laporta (LU2AOQ) mail: spam_OUTlu2aoqTakeThisOuTyahoo.com wrk: Arg. Assoc. for Space Technology. ham: TCP/IP high speed group HSG

part 0 2799 bytes content-type:text/plain; charset=koi8-r (decoded 7bit) š Lea wrote: {Quote hidden}> >From:ššš "Milan Pavlica (YU7AEC)" <.....mpavlicaKILLspam@spam@PTT.YU> > >Subject: Re: packet radio modem > > > >I have two schematics: > >one is with XR2211 and XR2206 - never work > >XR2211, 4046, 4049 - work but a lot of problems > > > Hi!, Yes the Mx614 is almost impossible to find, here at least. > But XR2211 & 2206 works great!, I sending and attachment with > the sheet (.GIF) I compress it as much as I could. > don't forget to use poliester capacitors, never disc ones, they > are very unstable with temperature changes. Know that > š > > I tried without luck to open the file that you post (modem.zip) > seems to be bugged, if you can, send it to my personal address > to avoid extra traffic on piclist that is already heavy :-). > The other modem with 4046 & 4049 never heard about it (?). thats construction of 9a5ei i will scan image and send you... Here are you schematic which i made... > š > > I don't know exactly for what are you needed this modem, the > XR2211 & 2206 works very good between 300 and 1200, and acceptable > at 2400 baud, but if you need more speed, or high noise inmunity > you may consider to change to MX GMSK chips (expensive and > difficult to adjust), or MANCHESTER modem > (very stable but uses a lot of bandwidth). bla bla bla, i know everything, but still, - it's do not work :)))) Also, i included schematic of those PIC modem... Please take a look on schematic and program and tell me can i use pic16f(c)84 instead of pic16c620 > š > > I hope it helps, see you. Thanks anyway {Quote hidden}> š > > š ------------------------------------------------------------------------ > šššššššššššššššššš Name: Exardmod.gif > šš Exardmod.gifššš Type: GIF Image (image/gif) > šššššššššššššš Encoding: base64 > > š ------------------------------------------------------------------------ > šš Leandro J. Laporta (LU2AOQ) > šš mail: lu2aoqKILLspamyahoo.com > šš wrk: Arg. Assoc. for Space Technology. > šš ham: TCP/IP high speed group HSG Attachment converted: birth:Modem.zip 1 (pZIP/pZIP) (000084F2) Content-Type: text/x-vcard; charset=koi8-r; name="mpavlica.vcf" Content-Description: Card for Milan Pavlica (YU7AEC) Content-Disposition: attachment; filename="mpavlica.vcf" Content-Transfer-Encoding: 7bit Attachment converted: birth:mpavlica.vcf 2 (TEXT/CSOm) (000084F3)