Am I the only one that when I first
saw that image, I thought now who used a Hot Dog to make a coil?
Joe WB9SBD
On 8/11/2024 1:27 PM, Hans Summers
wrote:
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Hi Bill
Always remember: "if it ain't broke, don't fix
it!". Ok I know yours actually IS broken but still the radio
works fine... So leave it be. Note that the -0 material is
permeability zero. It's the same as winding on air. It doesnt
even have any magnetic properties to restore by glueing it
back together, which would otherwise be the advice on a toroid
with actual permeability. The only reason for having the
toroid there at all is that you can't easily and repeatably
and reliably wind such a nice toroid on air. It just provides
a nice convenient shape so that when I say 25 turns it always
comes out at approximately similar inductance every time..
73 Hans G0UPL
My QMX+, built for 12V version, has been performing well
for some weeks.? I decided to tweak the LPF toroids to see
if IO could boost power a bit.
Imagine my surprise when L-518, one of two toroids for 10
and 12 meters, felt like mush when I squeezed it.
Further exam revealed it had split in four places, as can
be seen in the attached photo.
I'm asking for advice on what caused the damage, so I can
avoid that behavior in the future. I'm presuming one of my
12V batteries was over-charged to 13.8v, or maybe an SWR
adjustment using either a T-1 or a ZM-2 'searched' into a
damaging SWR range.
Since the radio still seems to function as normal, should
I bother to replace L-518?? Rather than risk hole or pad
damage, I'd snip this one out, and install a new one
wire-to-wire.
I'd appreciate your thoughts/advice.
- Bill? W3WJ
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