Hi Pete,
I also had problems with broadcast stations at my 4 EL bidirectional (330°/150°) broadside K9AY arrays 84 meters apart uses three 0° hybrid combiners. The problem was solved by a Hi-Z amplifiers with operational IO AD8855ANZ according to Steve VE6NZ in each of the K9AY Loop. I don't use any impedance transformers anymore. The amplifiers are connected directly to the K9AY antenna loops through a small capacitor. Karel OK1CF -----Původní zpráva----- Od: Topband za uživatele Pete Smith N4ZR Odesláno: pondělí 12. prosince 2022 15:59 Komu: topband reflector <[email protected]> Předmět: Topband: Sanity Check on K9AY Loop Sensitivity I just deployed my K9AY loop (yes, I know I'm late). Anyhow, while it shows substantial directivity on broadcast stations, I was surprise by how much the K9AY loop's sensitivity suffers compared to my inverted L. Listening to a broadcast station with the K9AY on 1500 KHz, the station is S6-7 in the right direction and S3 in the reverse. and S9 +10 on the inverted L. There's also something haywire in the K9AY's preamp, which *reduces* signal by a couple of S-Units. Could be I need to replace the transistor? -- 73, Pete N4ZR One of the RBN team _________________ Searchable Archives: <http://www.contesting.com/_topband> http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
