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Noisy Guest Revisited
Writing in the December and February issues of QST, W1ZR describes using a
Guest charger as part of the "UPS" for his ham shack. He found that a choke wound around an Amadon FT-240-4-3 core close to the Guest on the AC side plus a "brute force" "Pi" filter composed of 0.01uF capacitors (RS272-131) and 8 turns of 14Ga marine duplex cable on a Amadon FT-240-61 core beat the noise down to 60dB. UMMV 73, K3DWW |
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