Am 16.02.2013 13:03, schrieb Graham: [...] Unless its going into a glass display case .. then it will be (loaded rlc) large Q values are not too helpful :) My LF coil Q is roughly 1000 and i feel pre
But when we talk of the *loaded* Q of a (R)LC circuit, then your reasoning is correct. Unless its going into a glass display case .. then it will be (loaded rlc) large Q values are not too helpful :)
I would go along with that I would think the higher the Q the higher the losses in such a coil , the bigger the circulating values .. I look at 500 as the next band down from 160 , differing set of r
Hi Alan, Here is my thinking. Let's assume an Rground of 18 ohm. The loss of the 220 Q inductor is 9 ohm, making the antenna impedance about 27 ohm. The Rrad is tiny, about 0.322 ohm. The calculated
Am 16.02.2013 11:10, schrieb Clemens Paul: [...] The higher the *loaded circuit* Q the higher are the losses in all involved components including the coil due to increasing circulating currents. Give
You say you have a Q of 200 now.... this indicates a bandwidth of about 2kHz meaning you will probably need to retune across the band. A Q of 400 to 500 should be possible but unless the reduction in
Dear Dimitris, LF Group, There are 2 important reasons to have a high Q loading coil. The first, as you have already calculated, is to improve overall efficiency of the coil + antenna combination. To
Graham, I would think this thinking is wrong. :-) The higher the Q of the coil the lower are of course the losses in such a coil. We are dealing here with the *unloaded* Q of a component. But when we
Stefan, Regarding unloaded Q I think there is agreement Regarding unloaded Q it depends HOW it is increased. As Jim has pointed out increasing unloaded coil Q also increases somewhat the overall syst
