/diy/ - Do It Yourself

Anonymous Fri Nov 9 19:22:32 2018 No.1494568 [View]
File: 293 KB, 1026x630, it's dangerous to go alone, take this.jpg [View same] [iqdb] [saucenao] [google]

>>1494560
trap out, I heard it at 3100.9kHz just now loud and clear. didn't see it up the dial, but the HRF1's LO doesn't go below 5MHz anyway. it acts like a mixing product, maybe you need a few more ferrites
trap in, I see nothing on waterfall, hear only the faintest shadows of it
Pic related, my trap is just a 4th-order Butterworth high-pass filter at 3.5MHz. I'll worry about 80m once I can pull in 40m comfortably
btw pen knife and copper adhesive tape on FR-4 is a comfy way to do SMD. 9/10 would build again

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/diy/ - Do It Yourself

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