THAT looks much better built .. and shows the predicted results ... GOTCHA :-)
looks neat .. and works like it should
so you see its very often not just the components you use but how you arrange them
and as higher you go in frequency as more you have to take care of such things (no way to build such an ugly manhatten style construction for uhf or shf and show predicted results)
i guess main thing is the connectors .. and solder the caps direct to ground (with short leads)
finetuning could be done with the caps and with the coils (if you can move the windings a? bit on the core)
anyway .. you for sure learned something (and others on the group see what to do and what NOT to do if building a filter) ... or in fact we all learned from it :-)
happy homebrewing ... 73
dg9bfc sigi
Am 13.03.2025 um 19:31 schrieb Mitch NK3H:
toggle quoted message
Show quoted text
Jim, Dave, et al.,
Thank you very much for your suggestions. I rebuilt the filter using discarded SMA connectors I found in my junk box along with actual 270 pF caps that I ordered overnight from AMZN. It's all on the same board I've reused several times, so please excuse the abrasions, drill attempts, etc. The results are just as you predicted. Images attached. Again, thank you very much for your help. Yay!! Mitch NK3H
