Quote:
Originally Posted by Geo
At my lrl at pin9 there is signal 11.6v p-p. Between pin9 and c3 i connected a trimer 10k and adjusted it so at c3 to have 900mv p-p. Now it seems works very good but i have a mysterious problem. If pcb is out of shielding box then when i touch the antenna the led turns on. If pcb is inside the shielding box then if i touch the antenna and the led is on, it turns off. With other words it works reverse!!!.
Who is the right???
Regards
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Hi Geo
Good news from you!. Tell me more how your lrl work and show us your oscillograf snapshots (envelopes) in different test points.
My the question: at which side of C3 you have connected a trimer 10k - side to base of T1 or side to Pin (3 and 4 ) ?
900 mVpp - is probably too high amplitude for "scalar" mixer Tr2-L1-C11-C10. Big VCO amplitde can fully suppress "Gold Scalar signals" - (oversaturate gold and silver signals).
Reg.
Enjoykin4