Re: Performance of New R40C1 Ferrite Material Loopstick


Gary DeBock
 

Richard,

Modern DSP chips (SiLabs 4734, 4735 etc.) work well with any coil inductance from 180-450 uH (or even more), so as long as the loopstick coil inductance is within this range, the number of coil turns has little relation to sensitivity. If you get outside of this recommended range then you may suffer a sensitivity drop off on either the high or low band edge (some experimental results are posted at  http://www.mediafire.com/file/jwdqmdzmi0j/CoilInductanceShootout.doc/file
Yesterday's testing was done with live (weak) daytime DX signals, and no Q meter was involved. The testing will continue this afternoon, with a full report made later.

Gary DeBock (in Puyallup, WA, USA)

 
 

Join main@UltralightDX.groups.io to automatically receive all group messages.