6 and 8m QDX prototype
开云体育Sorry iPhone sent by a light touch of finger by mistake.?Bob, Jim and others, Here’s a pic of the 6m prototype. Firstly, I printed my own T50-0 toroids; secondly, you’ll note the T50–6 in the BPF; thirdly, you’ll note the binocular is not the glossy 43 mix rather a BN61-202; and, lastly, the Tx phase splitters is also a T37-61.? Output transformer is wound for 12V as a Really Weird Twisted Sisters Transformer (search for my previous posts in io).? Attached: Design schematic for LPF Analysis of design.? Implementation Pic of prototype? T50-0 printed toroids T37-17d can be used: Input L 10t T37-17 Trap L ? 9t T36-17 BPF L 11t T69-6? BPF C ?22pF Measurement: Rf Filter sweep ? 6m 8m TinySA both done with 35dB in-line 6m spectrum - quite good.? 8m spectrum the 8m spectrum is borderline ?but after more squeezing/splaying of LPF turns may improve harmonics |