Hi Randy and others, To make a hardware box that switches between lets say 4 radio´s Isn´t a big problem, making a PCB for it is also easy done If Paul provides a second output pin on LPT port,
BUT is it worth doing it for a LPT port ? - No contest-program are offering it now, and maybe never will - Let say you have to select the 3th radio for a contest you have to rewire your station...... - Laptops, netbooks and many brand PC´s don´t have LPT ports anymore - In PC´s you can put a PCI or PCIEX board if you find still full wired ports at a good price - BTW USB to LPT adapters are not working, We even bought some that claimed to do it all but had to send them back, (printing was ok but assigning a cmd to a dedicated pin was out of the question) I would go for a serial port (USB to SERIAL adapter works perfect and can go upto com255) It will need some user setup, for example RTS=0 & DTR=0 > Radio 1 RTS=0 & DTR=1 > Radio 2 RTS=1 & DTR=1 > Radio 3 RTS=1 & DTR=0 > Radio 4 (If a 3th line is assigned you can have 8 radio´s) I think this is much easier for other programmers (contest software) to implement another serial with this function for more then 2 radio´s If you still wanna use LPT pin14 for switching between radio1 and radio2 it all depends Now on who is set up for radio1 and radio2 (User input), but LPT pin14 (and if needed another one) could also be assigned to a serial pin You only need to lower the voltage from 12V to 5V (can be done with zener diode) To switch SO2R hardware. Guy ON4AOI > -----Oorspronkelijk bericht----- > Van: dx4win-boun...@mailman.qth.net [mailto:dx4win- > boun...@mailman.qth.net] Namens Randy Farmer > Verzonden: woensdag 6 januari 2010 4:49 > Aan: W9RPM; DX4WIN > Onderwerp: Re: [Dx4win] Wish List > > > >Hi, I really like the option to choose between different radios > quickly. > >Would it be hard to be able to include more than 2 in the next > release? I > >would personally like to see 4. This is especially handy on VHF/UHF > with > >different radios, not the all in one. Thanks- John W9RPM > > The problem with this is that it would require a proprietary hardware > interface. The existing two-radio switching uses the "industry > standard" LPT pin 14 toggle that's been around since the days of DOS > loggers such as CT and TR. Paul even made the logic of this control > line selectable to work with NA in Version 7. This convention works > well with several commercially-available SO2R switch boxes such as > the Top Ten DX Doubler I use. Using more than one LPT pin to do the > radio selection would require some sort of decoding hardware to do > the switching. I suppose pin 14 could serve as the least significant > bit of a two-bit radio select word and it would be up to the user to > come up with a custom switchbox to switch the various audio and > control lines among the four radios. I know of no hardware that > supports more than two radios. > > 73... > Randy, W8FN > > ______________________________________________________________ > Dx4win mailing list > Home: http://mailman.qth.net/mailman/listinfo/dx4win > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Dx4win@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Dx4win mailing list Home: http://mailman.qth.net/mailman/listinfo/dx4win Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Dx4win@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
