Hi everyone,
Thanks for the comments on my coil idea.
No one mentioned in either public or private communication that it has been
tried...so, I guess it is up to me. :-)
I'm not particularly worried about breakdown between the windings. There
should only be about 1000 volts between the worst case turns.
To elaborate just a smidge, here is a side view of the concept
... if it survives text "graphicizing"
--- Just about to scale on a 19" monitor set at 1024 wide ---
|<--------------------- 6" ---------------------->|
10M 20M 40M 80M
| | | |
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
2 0 0 0 1
0 0 0 2 0 0 0 0 -- 160 M
0 0 0 0 0 0 0 0
0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
The winding transitions between layers at the 1's & 2's
Input is at the left and band taps are spaced as shown (more or less).
Just for the history file, some other approaches I considered were:
A pair of spirals mounted in the same position as the concentric portion.
The center parts of these really don't contribute much and winding them would
be more difficult.
A Powdered Iron toroid core coil. At legal limit power this is physically
just as large as the concentric portion & costs a bit more.
Mechanically inserting enough core material to increase the effective mu of
the 10-80 meter portion to 2. Too "mechanical", & requires too much space to
park the core.
73 & Good evening,
Marv WC6W
*
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