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Capacitance and Q

A

amdx

Jan 1, 1970
0
Please add to the discussion on;
rec.radio.amateur.antenna

The subject line is--- Distributed capacitance effects Q?

The question is, does additional interwinding capacitance increase
losses in an inductor.

Mike
 
J

John Larkin

Jan 1, 1970
0
Please add to the discussion on;
rec.radio.amateur.antenna

The subject line is--- Distributed capacitance effects Q?

The question is, does additional interwinding capacitance increase
losses in an inductor.

Mike

Additional compared to what? You can't very well compare a given coil
geometry to that same geometry without winding capacitance!

Oh, I read somewhere recently that "interwinding" capacitance is, at
least in single-layer coils, usually tiny compared to coil-to-universe
capacitance. That makes sense, since the voltage between turns is
usually small.

John
 
L

LVMarc

Jan 1, 1970
0
amdx said:
Please add to the discussion on;
rec.radio.amateur.antenna

The subject line is--- Distributed capacitance effects Q?

The question is, does additional interwinding capacitance increase
losses in an inductor.

Mike
losse are propotionally and incremeantal additons of the actual
resitnace of the wire.. the real culprit with added winding is inter
widing capciatace, as small as it may be, each loop adds more stray cap
blues, and the result is a lower selfresonsnce. this ultimatley limits
the useful frequency range of that inductor..all a proportion balancing
act, as always

Marc
 
J

jasen

Jan 1, 1970
0
Please add to the discussion on;
rec.radio.amateur.antenna

The subject line is--- Distributed capacitance effects Q?

The question is, does additional interwinding capacitance increase
losses in an inductor.

I guess it depends on dielectric losses.

AIUI, parasitic capacitance is just like an external capacitor.

Bye.
Jasen
 
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