06-01-2019, 08:15 PM
Hi.
I got about 45 minutes today to play around with the little LNA amplifiers. Firstly I took the output from my three Auroras and fed them to a little centre loaded aerial and placed this on the bench I then switched on one of my TV9-90 TV's, it lost its road aerial years ago and has a flying coax with a plug on it, with no aerial there was weak sound on CH1 & 2 and a barely locked picture on CH9. Adding in the LNA and to the same aerial CH1 & 2 gives a reasonable picture and CH9 totally noise free. There was no crossmod or any other issues, one or two harmonics though.
I then tried the Hedghog on CH9, again really good also on CH1 with good results, mind there is no filtering after it so the LNA is taking full signal, on my 10Mhz Hitachi Scope there was 2v p-p on the RF output on CH1. I'd suspect they could be used for a decent sized aerial distribution system. No doubt filtering would be beneficial and some more tests on a technical basis.
I got about 45 minutes today to play around with the little LNA amplifiers. Firstly I took the output from my three Auroras and fed them to a little centre loaded aerial and placed this on the bench I then switched on one of my TV9-90 TV's, it lost its road aerial years ago and has a flying coax with a plug on it, with no aerial there was weak sound on CH1 & 2 and a barely locked picture on CH9. Adding in the LNA and to the same aerial CH1 & 2 gives a reasonable picture and CH9 totally noise free. There was no crossmod or any other issues, one or two harmonics though.
I then tried the Hedghog on CH9, again really good also on CH1 with good results, mind there is no filtering after it so the LNA is taking full signal, on my 10Mhz Hitachi Scope there was 2v p-p on the RF output on CH1. I'd suspect they could be used for a decent sized aerial distribution system. No doubt filtering would be beneficial and some more tests on a technical basis.
