Simple, effective preselector

Use this forum to discuss any radio-related topic outside of asking for advice (check out our Questions and Advice forum for those topics). As with all of our forums, treat others with kindness and respect.
Post Reply
User avatar
Andrew (grayhat)
Posts: 295
Joined: Sat May 28, 2022 5:56 am
Location: JN63pn

Simple, effective preselector

Post by Andrew (grayhat) »

The schematic is here

http://ve2azx.net/technical/FMT/L-C_FilterSchematic.pdf

the inductors are molded ones, that is "nothing to wind", the variable capacitor can be a "plastic polyvaricon", so it's simple to build, now... look at the response curve, a nice "bell" with pretty steep shaped sides; add it in front of a wideband LNA and you'll have a nice "tuned" preamp
Post Reply