[linrad] Re: Winrad V0.90

[richard <blueyonder.co.uk; richard.bown@xxxxxxxxxxxxxxxx>]

Giancarlo Moda wrote:
> Hi,
>
> FST switches have quite n interesting bandwidth but
> switching does not permit to work at 144 or even worst
> at 432MHz.
>
> FST3253 maybe OK up to 30 MHz then they may have
> internal unbalanced switching. You should see the
> conversion loss will increase and also the noise.
>
> FST3125 (3.3V) have been tested OK up to 50 MHz in the
> I7SWX 2T H-Mode Mixer with up and down conversion.
>
> 73
>
> Gian
> I7SWX

Morning all,
Looks like I've managed to kill the pcm side on two sound cards using winrad.
Still gotta find out how.
Now I notice one of the clever Italians has managed to use the video input of an BT878
TV card for sampling, I did find his web site although the mods to the card were obvious , but alas 
not listed.
Anyone know more about this ?

I agree with you comments above Gian, you can I&Q demod easily up to 2.4 GHz , but the penalty is 
noise, the higher you go in frequency the wider the bandwidth used, WBCDMA is running at 4.7 Mchips/s.
Way beyond bouncing a signal off the moon , I would n't even take guess at path loss.

The way I'm going is to use the finally IF for all VHF and microwave apps, this way I can gain
on demod and keep the brick wall filtering and strong signal handling at VHF/UHF,
That rig was built for contest work 25 years ago when there was activity in a contest.
My thoughts


Richard G8JVM

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