Hello Luis
The best way is to put the filter BEFORE the signal goes into the preamp.There are plenty of "cheap" diplexers, but if i were you, just make it yourself. You only need 50% part of the diplexer,so in a small weatherproof box build your own filter for it. On my side i have no problem with desense, MASPRO WHS-32N on 2m boom 7m high. BUT all is well grounded here. I have also homemade crossyagis on the roof,at 12m high,but no pol.switching there; gonna change them into X-quads with pol.switch, because the Maspro is too big for my roof. For my /p antenne i made myself a diplexer, but going to split it into 2 smaller boxes, 1 per antenne, LPF and HPF seperated.
73's
Jerry,ON4CJQ
----- Oorspronkelijk bericht ----- Van: "EC4TR Luis" ec4tr.luis@gmail.com Aan: amsat-bb@amsat.org, satdx-bb@star-com.net Verzonden: Dinsdag 5 januari 2016 20:53:24 Onderwerp: [amsat-bb] Info needed "European 145 and 435 MHz Diplexer and Dual Band Filter (Model: DCI-145-435-DX-DB)"
Hi all One guy, is selling this filter, http://www.dci.ca/?Section=Products&SubSection=Amateur I am thinking in the possibility of using it for desensing problem with FO-29. I`m pretty sure it would work fine, but the question is, would it pass dc power for feeding the preamp? Somebody knows it? I asked them via email, but not answer. 73 Luis EC4TR _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb