As a reference point, I was able to see half an S-unit (approx.) of sun noise with my 85cm offset feed dish with helix feed and MKU-232A2 LNA. Pointing at trees (forest) on the horizon also produced about the same noise increase as compared to cold-sky. When I get my AO-40 stuff back up I will make a more precise measurement using my SDR-IQ as detector (0.1 dB resolution in gain). Also the SDR-IQ can switch off AGC.
73, Ed - KL7UW At 03:24 PM 6/1/2009, i8cvs wrote: >Hi Nels, W0TUP > >You don't mention the size of your dish and the overall System Temperature >of your receiving system for 2.4 GHz but if it was good for AO40 you should >be actually able to receive a small level of Sun-Noise. > >As an example: > >Using my 1.2 meters dish with an overall System Temperature of the system >of about 72 kelvin I was in condition to day to get about 3.4 dB of >Sun-Noise as the included diagram showes. > >The signal radiated by AO-51 is too strong to evaluate if your 2.4 GHz >receiving system is in good shape or not. > >73" de > >i8CVS Domenico > >----- Original Message ----- >From: "Arlon Nelson" <[email protected]> >To: "Amsat-BB" <[email protected]> >Sent: Tuesday, April 28, 2009 3:01 PM >Subject: [amsat-bb] 2.4 Gig > > >Are there any satellites on 2.4 gig so I can check out my old AO-40 dish. >73, >Nels, WØTUP >Minot, North Dakota >[email protected] >http://www.w0tup.com > >Ward County - Grid Locator DN98if >TRIPLE PLAY AWARD No. 75 - A1 OPERATOR CLUB >SKCC 31T - Flying Pigs 590 - QRPp-I #760 >ARRL - FISTS #8610 - CC #1310 - FISTS WAS #143 >FISTS PLATINUM #365 - FISTS SILVER #367 >ARRL SSTV WAS #33 - IVCA MIXED BAND SSTV #1 >40 MTR CW WAS - DXCC # 39623 - RTTY WAS # 585 >COMMERCIAL RADIO OPERATORS LICENSE >*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* >CLUB CALL - WØJER (MAGIC CITY QRP CLUB) >FISTS #11975 SKCC #1000 >*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* >Two antennas met on a tower, fell in love and >got married. The ceremony wasn't much, but the >reception was excellent. >*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* > >_______________________________________________ >Sent via [email protected]. Opinions expressed are those of the author. >Not an AMSAT-NA member? Join now to support the amateur satellite program! >Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > > > > >_______________________________________________ >Sent via [email protected]. Opinions expressed are those of the author. >Not an AMSAT-NA member? Join now to support the amateur satellite program! >Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
