[amsat-bb] Landwehr 2m Preamp Help/Info & Manual Request
Douglas C. Papay
dpapay at chartermi.net
Sun Oct 7 10:29:45 PDT 2007
I recently obtained a Landwehr 2m preamp which I plan to use for AO-7
operation. The preamp did not come with any significant
documentation besides what is printed on the cover (and thats a bit faded).
The preamp appears to be functional, except that it has a tendency to
switch back and forth between RX and TX by itself (when no RF is
present and the PTT is not connected). This has made the preamp
unusable. Does anyone have experience with this preamp and/or know
how this issue can be resolved?
I am looking for any suggestions as well as any documentation
(manual/schematic) for this preamp that you might have. Your help is
Thanks & 73,
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