Re: Deshibo GA-450 Loop Antenna Modification Question
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Just a couple of ideas:
SHIELDING:? It's not a perfect shielding material, but will illustrate if good shielding would improve things.? At any hardware store, you can buy wide "decorative" shiney aluminum tape.? While the adhesive is not conductive, if you overlap enough, there will be enough capacitive coupling between applications to enable a "reasonable" degree of shielding.? It's inexpensive and at least worth a try.?
BEST CASE:? Get rid of that switcher!!!? In the design of the overall antenna, there should have been absolutely no excuse to install a switcher that close to the receiving element - the loop.? That amounts to engineering WORST PRACTICES!!!? Build yourself a good linear supply with a transformer (surplus), a bridge rectifier (surplus), filter capacitor (surplus), and a 3-terminal regulator (surplus).? You could even build it into the existing plastic enclosure.
Dave - W?LEV
Hi Martin
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Good to hear from you and thanks for the reply. I agree about the shielding from the DC converter and if I had the skills I may possibly try to attempt it myself. Another alternative is to look out for another used one at a very good price to experiment with modifying, keeping this one intact. I have to say my expectations were very low and I was expecting it just to be awfully noisy and pretty much unusable but I have been pleasantly surprised. Interesting about the tuned loop story. With so much RFI around I would have thought that was a bad decision on their behalf. I thought us radio enthusiasts loved nothing better than a bit of tinkering with electronic equipment! Although my friend at the radio club jokedthat we don't call it "tinkering" we call it "technical assessment"!!
73 Adam?
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