Hi - If you want a complete soundcard interface in kit form, at a low price, I recommend the one being sold by Dinish Gajjar, VU2FD. I bought one recently, and am pleased with the quality vs price. It only costs $18 US and I paid $5 US for air mail shipping from India to the US. So for $23, I got all the parts, isolation transformers, an opto isolator for PTT, and a beautiful PC Board. There is no step by step instructions with it, but the schematic, parts list, board layout etc. are all available on his website, as well as ordering information. Here is the link: http://www.foxdelta.com/products/soundcard.htm <http://www.foxdelta.com/products/soundcard.htm> You have to provide your own cables, but it makes it easy to configure it to your own needs. I am capable of scratch building a interface, but at this price, I imagine it would have cost me more to track down and purchase all the individual parts, plus I got a nice PC board too.
KCØPTO Les --- In digitalradio@yahoogroups.com, "adrianrav4" <[EMAIL PROTECTED]> wrote: > > Hi All > Having just moved house (& country!), and set up the HF radio gear for > the first time in quite a few years - I'm having a dabble with PSK31. > > I suspect that I'm having problems with poor isolation between the > radio and the PC - at the moment the 'quickly knocked-up' interface is > 'direct' - no opto or transformer isolation. > I can read the PSK31 quite nicely (using DigiPan) - and load up the TX > on low power (10W) - but higher TX power seems to generate odd squeaks > and general instability.... > ...also - I have yet to get a reply from any other station on PSK - > which makes me wonder if my signal's getting distorted past the point > of readability ? > > Does anybody have a source for 1:1 audio isolation transformers ? I > can't seem to find them from the usual suspects (ebay, CPC...?) - > would need to be an organisation that ships to Ireland..... > > Many thanks in advance > Adrian - EI5JV >
