Wimpie wrote:
don't know how well the drawing will come out, but it consists of:

100 uH in series with 1000 Ohms.
100 pF in series with 1000 Ohms

The two two networks above are in parallel

i.e.

|
|
!
-----!-----
| |
| |
L C
| |
| |
R R
| |
| |
------------
|
|
|

hello Dave,

Normallly the resonant frequency of circuit is the frequency where Zin
is real. The problem with this circuit is that Z is real everywhere

I'm not sure if that is a "problem", or a "nice feature" - it depends on
your viewpoint I guess!

and Q will be zero. So in my opinion it is useless to define a
resonant frequency for this circuit. The only other option you have
is to find the frequency where Im(current left leg) = -Im(current
right leg), 1.600 MHz.

Best regards,

Wim
PA3DJS
www.tetech.nl


It will always be real if

R = sqrt(L/C)


If anyone wants to prove it, I will let them. I did in many years ago,
but don't have the inclination to do it any more.

IIRC, the proof is not particularly difficult.