I have been playing!?? Tested Crystals and pick some.? I did the filter in the Ubit.? 8 crystals.? 12 MHz, the tall ones surplus.
Not the short uProcessor ones.
Bought a bunch from All Electronics.
Two in parallel with input and output.
I some how came up with the info that my caps to ground were about 250pF.? With 270 pf in place.? I get a big dip.? 3dB or so. Right in the middle of the pass band.
So 2 lobs, over 3 dB?
I have a transformer 1:2 ? to test with 50 Ohms generator.
What would 3dB ripple sound like.
With no series caps, just like Ubit, can I get rid of the ripple?
Anyone know any changes.
Mike, WA6ISP
