5 Oct
2008
5 Oct
'08
4:32 a.m.
At 05:37 AM 10/4/2008, Tim Tapio wrote:
Hello all,
I'm planning a new antenna system and planning on using an SSB preamp on the 430 downlink side. The 7000 uses helical bandfiltering. My antenna separation will be on an 8' fiberglas boom. Will desense be an issues? Should I plan on using a bandpass filter such as a duplexer?
Thanks and 73 de Tim, K4SHF
Hi Tim,
The SP-7000 has a pair of back-to-back diodes on the input to protect the gasfet BEFORE the helical filter so it is pretty easy to overload it. I would guess that 8' is not enough seperation and you will need the duplexor so you should probably plan for it.
73, Tony AA2TX