Fw: [HBR] coil shields
Sandy and Kees Talen
[email protected]
Sun, 14 Apr 2002 16:23:44 -0500
The only thing to watch for on the thin soda and brewski cans
is that if it isn't relatively sturdy, it will move ......if it moves it
will
change the capacitance to the coil. A loose 1st oscillator socket
in it's mounting (non current carrying) will demonstrate this effect
if you "tap" the enclosure. Especially since the first osc frequency
is pretty high for the higher bands on this design. I would also like
to know the effect of very thin aluminum shielding. I've got my eye
on the tall thick aluminum salt and pepper shakers. Grocery store
should be full of good coil shields.
Same desire to minimize movement of the coil itself on the coil
form ....both individual windings and the form itself.
73s Kees K5BCQ