[Skimmertalk] How much preamp gain for QS1R?

[Dai NAGAKURA]

de JF2IWL 

I use normal +20dB preamp plus Diamond Antenna's DMAX50 Preamp.
http://www.diamond-ant.co.jp/english/amateur/antenna/ante_7rec.html
It can vary gain from (-)20dB to (+)20dB.

My conclusion is that  around +30dB is the best for QS1R decodes
in my environment.
I insert W3NQN BC Band rejector and RF guard before these.

Well known that  Decord ability is increasing function of 
decorder number,
but It's difficult to seek and determine the best position
considering noise ,S/N and so on.

Wish little early HNY to skimmer members from JA.
Dai JF2IWL


On Sat, 31 Dec 2016 08:10:23 -0500
Wes Cosand <wes.cosand at gmail.com> wrote:

> I did some experiments yesterday running two QS1R's, both with DX
> Engineering 16db preamps with varying amounts of attenuation.  With the
> current conditions with my antennas 20 meters and higher needed most of the
> preamp gain to hear some of the stations.
> 
> Wes WZ7I
> _______________________________________________
> Skimmertalk mailing list
> Skimmertalk at contesting.com
> http://dayton.contesting.com/mailman/listinfo/skimmertalk

-- 
Dai NAGAKURA <ndai at cameo.plala.or.jp>