O oldmech New Member Jan 20, 2003 #1 i am looking to build a directorial antenna for a tracking dog collar, the freq, is 217.099.
herbymcduff New Member Jan 20, 2003 #2 What is the frequency in 217 hz, 217khz, or 217Mhz? Why wouldn't just a normal antenna work.
Sebi Active Member Jan 20, 2003 #3 I think the freq. 217MHz.If yes, You can build a 3-4 element Yagi antenne for direction search.
P Pilot New Member Jan 21, 2003 #4 Do you want a simple or complex system? For a simple - but effective - handheld system see........... http://www.ussc.com/~uarc/rptr/ark_df_desc.html The design shown is for 144MHz and would need to be scaled - read the text for directions. We have used a similar system in parallel with our commercial equpment and have been impressed with the results. If you want complex then have a look at........ **broken link removed** for a doppler design. Do a google search for 'df antenna' for even more. :lol:
Do you want a simple or complex system? For a simple - but effective - handheld system see........... http://www.ussc.com/~uarc/rptr/ark_df_desc.html The design shown is for 144MHz and would need to be scaled - read the text for directions. We have used a similar system in parallel with our commercial equpment and have been impressed with the results. If you want complex then have a look at........ **broken link removed** for a doppler design. Do a google search for 'df antenna' for even more. :lol: