Re: LF: EA in LF soon

[DK7FC <selberdenken@posteo.de>]

Hi Luis,

Very nice! You could reduce the distance between the upper and lower coil so they get a better coupling. This should bring you down to 137 kHz. You could make the distance between the coils, i.e. their coupling, adjustanble by using a threaded rod mounted into two plastic spacer plates. This comes to my mind when seeing the photos :-)
Our WX is as nice as yours today :-)

73, Stefan

Am 11.04.2016 11:05, schrieb VIGILANT Luis Fernández:

Hi LF

 

My progress to get access to LF:

 

Added a coil on top of the 300mm pipe. With this in series can reach resonance at 270KHz

https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/IMG_20160409_183709.jpg

https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/sark_029.bmp

 

Then added another coil. Two layers winding, reaching 152KHz

https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/IMG_20160411_093327.jpg

https://dl.dropboxusercontent.com/u/7162072/Fotos%20varias/MF/sark_031.bmp

 

I'm afraid I winded "the wrong way" to get it working as yougurt cup over the top coil. Will try to

reverse it. Anyway a convenient fixing (not the one shown in picture) can be made keeping one over the other

 

Next is to play with top load capacitive wires to increase capacity and get it down to 137KHz

 

.....keep tuned ! ;-)

 

73 de Luis

EA5DOM