View Single Post
Old 21st Feb 2009, 11:57 am   #16
OErjan_S
Retired Dormant Member
 
Join Date: Mar 2007
Location: Skelleftea, Sweden
Posts: 250
Default Re: Measuring Resonant Frequency

No, one set of coils is enough, diameter is no matter as long as it is in say 20-80mm and frequency is low enough to prevent them being good radiators.
the coils will act as a mini loop antennas both transmitting and receiving, luckily not very good transmitter antennas at 7MHz which is as we want.
with high Q tanks I have had to use above 250mm to any of the loops as they where noticably increasing bandwith otherwise (loading the tank down)
OErjan_S is offline