Hello Nicolas,
With a higher diameter you get more L at less turns, so more volts per
turn. This makes it necessary to use a better wire insulation or a
higher wire spacing, depending on the power. Keeping the coil dry is
important, no matter what wire you use. Thus i have to go immediately
QRT on VLF when it starts to rain. On LF, it is enough just to cover
the coil by a trash bag...
73 and GL, Stefan/DK7FC
Am 17.10.2010 00:36, schrieb [email protected]:
Hello Rik,LF
Because I had this diameter in PVC and especially to limit the
losses in the coil.Less length of wire and of course a better Q
factor.Unfortunately this afternoon I wanted to increase the power for
a last test to 430W,it was raining and there is an spark between two
coils and a beautiful burns.Too much voltage can be a problem or
isolation of wires? I will repair it with news tests. I did not know
that these diameters are more vulnerable to losses in nearby object.
Thanx for this information.
If you want some pictures give your personal email Rick.
F4DTL Nicolas JN18FP
Dans un e-mail daté du 16/10/2010 15:36:50 Paris, Madrid (heure
d'été), [email protected] a écrit :
Hello Nicolas,
is there any particular reason you made a large diameter
loading coil ?
I recall a discussion (maybe 10 years ago) on this reflector
where the outcome was that large diameter coils (to a certain extend)
have a better Q, but are also more vulnerable to losses in nearby
object.
73, Rik ON7YD
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