to DSP Blaster and RITTY, Brian also wrote Yagi Optimizer and Antenna
Optimizer which IMHO are the finest antenna modeling programs ever
written. Unfortunately Brian does not actively sell to hams any
longer because of his piracy experience (happened with YO also) but
you might be able to get a copy from him since you are in the USA. He
will no longer sell anything to Europe. Contact me privately if you
have trouble reaching him. BTW, he provides excellent support and
spent nearly an hour with me on the phone when I was having troubles
getting DSP Blaster set up (BTW it only works with an ISA Soundblaster
Vibra 16 card).
Here are a couple of DSP software comparison articles by W3SZ:
http://www.elecraft.com/TechNotes/w3sz_dsp/w3szdspnew.htm
http://www.nitehawk.com/w3sz/w3szdspnew.htm
I mainly use DSP Blaster on 160 meters where my needs are much
different than for EME & VHF, for the following reasons:
1. Finding weak signals is not typically the same problem on 160 as
on VHF where you have no idea where to look. Hence a wideband
waterfall is not as critical. Although DSP Blaster does have a decent
narrowband waterfall which can be useful to help you get on the exact
frequency, I mainly use Blaster for narrowband CW
filtering...especially the Coherent CW function.
2. Noise on 160m is typically impulse type, not galactic as you have
at VHF, which means the ultra sharp narrowband filters of some DSP
programs will not work as well due to ringing.
3. I've been using Spectran if I need a wider BW waterfall, and then
switch to DSP Blaster for narrowband filtering.
73, Bill W4ZV
P.S. Sorry for the confusion on my call. Tom W0ZV inherited my old
call but not the email address. ;-) That was actually me and not
him who posted the previous message.
--- In [email protected], "i2phd" <[EMAIL PROTECTED]> wrote:
>
> --- In [email protected], Ken N9VV <n9vv@> wrote:
> >
> > Dear Tom, I was searching for info about the K6STI DSP
> > and these two links are the only ones I found with any
> > info. Did he quit selling the unit? there doesn't seem
> > to be any info since 1997.
> >
> Brian K6STI seems to be reachable at [EMAIL PROTECTED], at least this is
> the address he has used when posting to some newsgroups. I have been
> told that in the early 90s he left his job and invested some money in
> the development of his famous RTTY program, which he distributed both
> in demo version and in a registered, not time limited, version.
> Unfortunately the demo version was quickly hacked, and the time limit
> removed. So he lost a lot of money, and he got so angry to make him
> decide to abandon completely the development of ham programs. A few
> years ago he didn't even answer to emails regarding his software, or
> at least I have been so told.
>
> In his DSPblaster program, which in the past I have used, he does a
> coherent CW demodulation, generating the I and Q component. This is
> equivalent to case 1) of my previous message, with the LO set at the
> frequency of the audio CW signal incoming from the Rx. He then allows
> to listen separately to the I and Q channels. But this has nothing to
> do with the need of an external quadrature mixer for separating the
> wanted from the unwanted sideband. There is no way out, unless the
> external hardware operates in quadrature, no software magics can
> recreate those I/Q components that haven't been generated by the
> hardware, and the two sidebands are by now irremediably mixed together.
>
> 73 Alberto I2PHD
>
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