K9DP BCI Filter - INSIDE THE G90!
Executive Summary Oh yeah. This is the ticket. The $20 K9DP QRP broadcast band filter. Nice price to performance ratio, easy to assemble, and small. If you have a G90 and live 1.5 miles from a 50 KW AM station, you know why you need one. If you travel with your G90, you may learn why you need one. Turns out, this filter can be easily installed INSIDE the G90, in the form of a new receive jumper. This permits filtering to be done in the receive path only. No external boxes and cables, and better yet, NOT transmitting through the filter, which happens if you put the filter after the antenna tuner outside the box. In my radio, the install looks like this. The filter is visible as the heat shrink-encased mass on the right top side of the speaker hole, under the top circuit board. What's a K9DP QRP BCB Filter? If you're fond of inexpensive or home-constructed QRP rigs, you know many need help rejecting strong broadcast band signals. This kit is an a...