I would like to drift a bit. We started a few years ago what we coined "QRP in the Park". We pick a park, everyone shows up about 5 pm (sat or sun) and brings their QRP rigs with whatever antennas they have. 4 hour field days if you would. We do these about every 4 or 6 weeks. Lots of fun, no stress. Then, my buddy and I bought a bunch of the Byonics 15 milliwatt tx's. We hide these in the park, and hand out our DF equipment for others to use. This has swung several hams over to join us in the DF hunts. And then give the equipment to a 10 year old. They love it.
So enjoy the outdoors, have fun and spread the joys of DFing.
Yes, go with the 62/63 mix. As to how the speakers are picking up an FM station, it goes like this:
All FM broadcast stations emit a small about of AM. The FCC states that it has to be 40 Db down from the carrier, which is the same as 1% AM modulation. Thats not much, but if the station is a standard class B FM, the carrier ERP is 50,000 watts, so 1% of that is 500 watts worth of AM. That can be heard for quite a range. I have walked into many FM transmitter sites that were runing around 5% or more of AM modulation. The job on hand is to stop the FM carrier, and the answers about the ferrites on right on.
tom bosscher K8TB (radio broadcast engineer for 35+ years!)
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