Two things I did when I started out with BPSK31: I purchased a Donner interface 
(Web address is http://donnerstore.com,) and I purchased a PSKMETER (Web 
address http://www.ssiserver.com/info/pskmeter). Also when tuning up and 
adjusting your sound card use a dummy load and you should not have to run more 
than 40 watts, usually less. Donner makes interfaces for a number of popular 
rigs. I mention Donner's only because it's probably the simplest to hook up but 
their are many good interfaces on the market some that do quite a bit more. So 
you need to do some research. 
   
  Enjoy.
   
  Charles, K0CW

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



         

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