| T O P I C R E V I E W |
| jagoodjee |
Posted - Mar 24 2010 : 2:06:30 PM
I bought a part from rapid which is basically a ferrite rod with a MW and LW coils slid onto it, http://www.rapidonline.com/Electrical-Power/Transformers/Ferrite/MW-LW-Ferrite-rod-aerial/73119/kw/ferrite+rod. Both coils, i'm not sure which is LW or MW, one has more coils than the other, have four connection wires, sleeved in blue, red, black and one unsleeved. Im guessing one is for the aerial connection and two are to connect across a variable capacitor/tuning capacitor and not sure about the other, I could be totally wrong though. I need to know which wire to connect to the aerial/capacitor, or shouldn't it matter? Also please advise me as to which coil is for which frequency MW or LW. I am working on breadboard by the way. Thanks
My circuit is similar to this http://www.zen22142.zen.co.uk/Circuits/rf/amrec.html and is very basic I know so please dont be critical just give me a straight answer as to how to connect the coil and rod.
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| 1 L A T E S T R E P L I E S (Newest First) |
| audioguru |
Posted - Mar 25 2010 : 1:25:30 PM
I don't think that extremely simple radio works.
It doesn't have an AM detector diode and the "regenerative signal" from the 120k resistor is DC, not signal. It is DC because the 100n capacitor shorts any signal to ground.
A breadboard does not work with radio circuits. A breadboard is for DC circuits.
Simply try your circuit with one coil at a time. |
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