[amsat-bb] 70 cms pre-amps

[G0MRF@xxxxxxx]

Hello Group.
 
There have been several mails recently either reporting poor receive  signals 
on U band downlinks or asking about 70cms pre-amps.
 
I have been working on a general purpose PCB for a 70cm / 23cm pre-amp.  
Although this is 'work in progress'  the results on 70cm have been quite  good. If 
anyone needs some encouragement to try building a pre-amp for  themselves 
then there are some basic details at:
 
_http://www.g0mrf.freeserve.co.uk/432LNA.htm_ 
(http://www.g0mrf.freeserve.co.uk/432LNA.htm) 
 
The ATF54143 seems very forgiving and good results can be obtained even  with 
'dead bug' construction.  - As long as you don't have too much source  
inductance and you use the resistor in the drain.
 
73
 
David  G0MRF
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