开云体育

My second bitx40 came damaged. I found the broken T4 transformer wire, and I fixed it. TRX transmits but with weak power but I leave it to fix later. Unfortunately the reception is still poor but when I touch my finger the L3 ?of bandpass filter, reception is greatly improved, you can see it here . As I watch the coil bandpass filter seems that L2 has more turns than L1 and L3, it is similar to VFO L4.

And here my question is how many turns on which core have the L1, L2, L3 bandpass filter coils and what are the characteristic data of the VFO L4 coil. I could unwrap a few turns of L4 to get L2 ( or L3, or L1 ) - it looks like L4 has the same core and same wire diameter ....

best regards

Tom

on my BITX40 L2 has 50 turns......

Tom

all bandpass filter coils L1, L2, L3 have 50 turns ? :(

Tom

It looks like women who make BITX40 instead of L1. L2, L3 bandpass filter solder coils used in VFO ..... after reducing 10 turns of each coil L1, L2, L3 my BITX40 works in RX and TX as it should .... anyway I'm waiting for uBITX ....: )

Tom