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Old September 26th 09, 12:26 AM posted to rec.radio.amateur.homebrew
Kenneth Scharf Kenneth Scharf is offline
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First recorded activity by RadioBanter: Aug 2009
Posts: 136
Default coils : turns shorted = quality ?

Tomylavitesse wrote:
HI,

Often I can see coils where some turns are shorted in order to modify there
value.
I wonder whether these shorted turns would not be seen as a short cicuit and
could decrease the quality of that coil.
How can I have an idea of the lost of quality without complex equipment ?
I plan to build this kind of coil for a shortened antenna...

regards


If the shorted turns are connected to one end of the coil then the total
shorted turns would appear as the final turn of the coil. In amateur
transmitters the band switch often shorts turns from the cold end of the
tank coil as one switches to higher frequency bands. The shorted turns
simply are not in the circuit I guess.