http://www.amsat.org/amsat-new/articles/Mode-J/
73, Drew KO4MA LM 2332
----- Original Message ----- From: "Bill Bruno" [email protected] To: "Amsat BB" [email protected] Sent: Wednesday, September 27, 2006 7:04 PM Subject: [amsat-bb] 70cm preamp
On my V/U setup I have a SP7000 70cm preamp. Working FO29(JAS2) my 2 meter signal overloads the preamp, my signal splattering like an adjacent strong station. With preamp off the problem is not there. In testing I found the overload happens in any combination of 70cm 2m frequency pairs. I can eliminate the problem by lowering the tx power, but by doing so I have a hard time copying my own signal. How can I eliminate the 2m sig overloading the preamp while still maintaining adequate power? Antennas m2 436cp30, Gulf Alpha 2m5el, both right hand polarization. I could use some suggestions. Thanks Bill
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