Re: RF Chokes (making of...)
At the expense of a little loss in performance you could probably get away with using just a resistor instead of a RF choke unless the choke is required to couple magnetically with another circuit. So that's pence, not pounds.
To use a small resistor sized inductor, just choose the largest inductance that has a self resonant frequency above the range you're building the radio for- if you still need more inductance, put a few in series.
A £20 rf choke sounds more like a transmitter part than anything receiver related!
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