hello benham,
It is possible, I built this rather quickly using fine magnet wire on thin masking tape forms. Made quickly, works but is simple and somewhat fragile. here's a photo, second photo is of my android phone showing station being picked up w/ signal meter showing strong signal. Being a totally passive system, probaly only works w/ strong signals, works well when does.
I'm going to try and make different coils using thicker magnet wire, may work better since thicker? I'm going to get some fm boosters used for car and put on front end to boost weaker signals to compensate for passive system.
The trimmer caps I used are 9 to 180pf, wide range, these are surplus and I can get quickly if someone wants to try this along w/ 1N34 diode.
Please show us pics of your 42 please Benham!
