[Flexradio] 6M Preamp

[Dave & Nancy Ridge]

Clay, I have used both the ARR and the DownEast preamps on 6 meters. You 
need one or the other to work weak signal 6 meters on the SDR5000! I can see 
no preformance difference in either. i.e. one is good as the other.

Your noise floor will be to high on 6 meters to take advantage of the .5db 
to .7db NF! Yes, the output is too high on either preamp but you can adjust 
the SDR receiver input as Tim said. You can turn off the SDR built-in 
receiver preamp on 6 meter.

I work 6 meter meteor scatter daily and have found the SDR5000 is a great 6 
meter weak signal rig

BTW, Elecraft has come out with a new 6 meter preamp for their K3.

Dave, W9DR

----- Original Message ----- 
From: "W7CE" <w7ce at curtiss.net>
To: <flexradio at flex-radio.biz>
Sent: Wednesday, January 14, 2009 9:37 AM
Subject: [Flexradio] 6M Preamp


>I just ordered my Flex 5000A and now need to decide which 6M preamp to use, 
>but I'm now sure how much gain is needed.  My 6M interests include weak 
>signal (EME, tropo and M/S) and contests where I have a few really loud 
>local signals to contend with.
>
> I've looked at the ARR P50VDG which has 24 dB gain and a 0.5 dB NF, and 
> the Down East Microwave 6MLNA which has 18 dB gain and a 0.7 db NF.  I 
> don't want to add more gain than necessary to achieve great receive 
> performance. My current 6M rig is a 756 ProIII which has been a good 
> performer.  I'm hoping to hear even better once I have the 5000A up and 
> running.
>
> Suggestions or comments anyone?
>
> 73,
> Clay  W7CE
>
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