Re: [amsat-bb] My preamp coming out...

["Graham Shirville" <g.shirville@xxxxxxxxxxxxxx>]

I offer just one caveat to mast mounted preamps..

If you are in an area of high RF levels then you may need to have a high Q 
filter up the mast ahead of the preamp to avoid crossmodulation and other 
nasty effects which can outweigh the great benefits of the LNA.

One further thought - try to keep the water out of the amplifier and then 
provide a small hole to let the water that has got in escape. Then make sure 
you have a nice voltage regulator in the LNA box which gets warm when it is 
working. Then keep the power on it 24/7 to stop condensation occurring. Then 
sit back and enjoy the benefits.....

73

Graham G3VZV
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