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RE: [linrad] Hardware
- Subject: RE: [linrad] Hardware
- Date: Thu, 9 Jan 2003 07:25:53 -0000
Hi Jim, yes I am going to try 144 to 2.5 Mhz initially, as you say it should
be relatively easy to provide enough selectivity with a filter to protect
the mixer. I have a couple of DCI 4 pole BPF's which will do nicely. I am
going to use my signal generator as an LO initially.
As for the Pentium 475 I have to say that I think that it will be good
enough to get you well on the way and if you limit yourself initially to
sampling at 48khz with the Delta44 then you will have no problems. I would
definitely try the P 475, it won't be as nice as a P4 or a fast Athlon but
it will work pretty well and the fact that you are on eme using Linrad will
be a revelation! If you have some frequency agility with your LO then using
a 48kHz window is not that limiting anyway.
Just my thoughts
[mailto:owner-linrad@xxxxxxxxxxxxxxxxxxxxx]On Behalf Of
Sent: 09 January 2003 04:40
Subject: [linrad] Hardware
Well the Delta 44 is now on its way here, but I have a long way to go for
my change over to Linrad. I am still planning and rethinking my aproach to
Linrad. I would like to take a path that minimizes wasted purchases.
The Time machine would be such a waste.
I may have missed this too on the web sites, but how much gain ahead of the
needed? Is an LNA at 2.5 Mhz helpful here to keep the mixers after my front
end out of
trouble? I suppose that selectivity between mixers is helpful too...?
Per Conrad, it looks like my Pentium 475 Mhz computer will not be fast
for proper operation at 96 KHZ bandwidth. I will continue my search for a
capable Linrad PC.
73, Jim Shaffer, WB9UWA.