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Old May 9th 05, 04:56 PM
Tim Wescott
 
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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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