NI7J-WH2XND

&

K7PO-WH2XXP

Transmitting on 2200 meters using WSPR Digital mode. 

WH2XND 137.527 KHz

WH2XXP 137.507 KHz

Antenna is Voice of America.

GETTING STARTED ON MF & LF

TRANSMITTING ON 75 KHZ

75.5 KHz 5.1 mH required to resonate

Five coils in series for 75.5 KHz ! Coil enclosure now has side panels as seen in our Photo Gallery.

Coil Configuration For 69.8 KHz

The 475 KHz "Loaded Dipole Project" coils really came in handy for LF testing.  Both are held in mid-air using a one inch thick piece of polycarbonate  material. The total inductance is now 7.2 mH!

Remote Tuner For 75 KHz

The remote tuner uses 60 nF of capacitance for tuning. The white mounting material used for mounting the capacitors and other components is a one inch thick UHMW polyethylene.  This stops high voltage arcing to the steel back panel in the  enclosure. I hope you enjoy the Photo Gallery.  

Thanks for stopping by.  

Ron NI7J-WH2XND

MF-LF sites of interest:

WEB - "The VE7SL Radio Notebook":  http://qsl.net/ve7sl/  

VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves":  http://ve7sl.blogspot.ca/

http://njdtechnologies.net/

http://www.w1tag.com/

http://www.w1vd.com/

75, 137 & 475 KHZ PHOTO GALLERY

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Ron@NI7J.com