Hi, Recently I bought a KBPF3 from a private party, intending to use it in K3 #24's subRX for general coverage. It shows a very interesting behavior, one that I've not been able to change or explain. I should say that using the sub in certain settings may also be causing the problem, but this isn't a sure thing.
On the ham bands when the KBPF3 is bypassed, the sub audio is clear and distinct. Outside the ham bands, for example on 5 MHz WWV or AM broadcast, the sub audio is muffled and sounds like its bandwidth is restricted (muffled and narrow banded) and there is some distortion. This is all by ear and compared to the main receiver. The main is very clear, and I've never had any complaints. Since the only difference between that I know of is having the KBPF-3 engaged on general coverage, the problem seems to follow KBPF-3. The problem could be something else though. That's what I'm trying to find out. However, having the front end filter affect IF makes no sense at all. That's why cause and effect aren't working for me here. Has anyone else seen this behavior with the subRX when using the KBPF-3 for general coverage receive? Any idea is welcome. Thanks and 73, matt zilmer, W6NIA K3 #24 K2 #2810 I'm confused how the front-end filter can have such an effect on ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
