VK3NX Australian Amateur Radio Station |
3cm EME |
NEW FEED WITH SUPER VE4MA CHOKE FLANGE FITTED JAN 2015 Sun Noise = 14.8 dB (SFU = 148) Moon Noise = 1.65dB CS / Gnd = 4.2 |
Audio Clips of 3cm EME: |
RW1AW |
Recordings taken at JA1WQF... on 2.4m dish (Thanks Mitsu) |
OK1KIR - VK3NX QSO |
Using a Large bolt of 22mm diam, (0.77wL), shaped to a point over ~ 2wL, the WR75 Waveguide piece was heated and flared out to circular. A 3 screw tuner (utilising only 2 screws) was used to achieve a 25dB RL. A Super VE4MA choke flange was fitted and adjusted for best illumination. This feed produced about 0.25dB more moon noise compared with the original feed which utilised an "original" dimensioned VE4MA choke flange. |