[amsat-bb] Landwehr pre amp

Alan wa4sca at gmail.com
Thu Jun 8 16:37:30 UTC 2017


Will send you a copy of the 2 m manual, which includes a schematic.  It is
probably very similar to the 70 cm version, except for some circuit values.



<-----Original Message-----
<From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Jeff
<Sent: Thursday, June 08, 2017 11:30 AM
<To: 'AMSAT-BB' <AMSAT-BB at amsat.org>
<Subject: [amsat-bb] Landwehr pre amp
<Awhile back I  purchased a set of Landwehr Preamps, for 2 and 70cm. I just
<got around to setting them up in my station in NJ. Both are DOA, so now I'm
<trying to fix them.  Does anyone know where I can get a schematic, or
<that can fix these that has the parts. Both units relay are function 100%,
<issue is with the rx on both units. The 70cm one shows hi SWR and low RX,
<the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm
<not sure these are available anymore on the open market..
<73 Jeff kb2m
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