RE: [ Beginner ] - Please advise on dongle to receive both 1090Mhz and 978Mhz

[abcd567]

@johndyoung1

I’m actually making another colinear antenna now that is the correct length for 978. I found the forumla today and the one I made last night was actually for 1090. I’m about to go hook up the new antenna but since I am only doing 978 and most of the traffic on 978 is VFR day, it will be tomorrow before I have any idea if it is doing better.

For reference purposes, make a very easy DIY antenna QUICK SPIDER.

In above how-to, the dimension for central whip and radials are given as 69 mm, which are for 1090 MHz. For 978 Mhz, instead of 69 mm, use 76 mm.

For ease of making, you may also use only 4 radial, though 8 radials give somewhat better performance.