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-exray- wrote:
On an example like a simple homebrew 2 tube regen set it is typically recommended to use a metal front panel to "shield" the ckt from hand effects. However, you can still notice some effect by touching the ground/panel. Would one see any advantage by using double-sided PCB with the two sides not electrically connected? -Bill If the chassis of the set is not referenced to the same ground that you are then touching the chassis will change the effective capacitance of the tank circuit. This effect will probably be greater if the antenna is capacitively coupled rather than inductively. The two things that I'd do before experimenting with the PC board would be _first_ to make sure that the chassis of the receiver was brought to a good ground in the station, and second to consider putting the entire receiver into a shielded box. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
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