Still kinda new to the hobby but moving forward. My primary monitoring interest is MilAir but also CivAir.
I need to amplify and split my antenna feed for the below setup.
Note: Cost is a factor. I'm not going the Stridesberg route and am fine with the 'good enough' methods outlined in many of the posts here.
1. Tram 1411 with center whip removed. Mounted ~6ft above roof line, 24ft AGL.
2. ~30ft RG-6 thru attic almost to desk area with 6ft RG-6 patch cable w/barrel connector to reach desk and devices. Close to 40ft total run. I currently use a BNC - F adapter for the scanner and a F - SMA adapter for the SDR.
3. RTL-SDR V3. I use this alot for MilAir band searches and stored freq. scanning.
4. OLD BC-950XLT. Mostly CivAir only.
5. Will add a BCT15X soon.
So, need to feed a SDR and 2 scanners. I also want to amplify the signal. As an experiment I connected a ChannelMaster CM-3414 from our OTA TV setup to the Discone then to the SDR and BC-950XLT. I was able to receive the Charleston, SC airport (KCHS) Tower (noisy but readable) and the ARTCC RCAG channels as well as the Chas. Air Force Base "Palmetto Ops" channel. I normally cannot hear those. For MilAir I am midway between 2 MOAs. The Charleston/Beaufort coastal areas (50-60 mi) and the Gamecock MOAs in the Midlands/PeeDee areas of SC (~70mi). I have had decent luck receiving A2A comms of fighters doing A2A combat training in BOTH areas but it's sketchy. I'm convinced some signal amplification and hopefully noise reduction will help.
LNA
I read MANY posts in this sub-forum about antenna splitting, TV distribution amps, LNAs, etc., to the point of info overload. I'm not a ham nor well-versed in antenna theory and the engineering level stuff but do have a grasp of the basics. It seems a LNA of some type, ideally mounted at or near the antenna will give me the best signal improvement. I have these questions/requests:
1. Recommend a reliable wideband LNA, Noise Figure <1dB, around $30 or less? Model?
2. How do I mount the thing on the mast? The simpler the better. OR, if you know of one that comes in a weatherproof enclosure please advise.
3. Power: There is power in the attic. That would be approx. 20-25ft. from the antenna. The RG6 runs through the attic. What are my options to power a LNA?
Split Antenna Feed
Assuming I get a LNA up and running I need to split the feed for 3 or (future 4?) devices listed above.
1. Will I need to attenuate?
2. With my varied radios (SDR, old and new scanners) will the attenuation need to be varied for each device?? If so what do I need to do so?
3. Or, just use a quality 4-way TV splitter and good to go?
Will greatly appreciate advice and suggestions, the simpler the better.
Ken
I need to amplify and split my antenna feed for the below setup.
Note: Cost is a factor. I'm not going the Stridesberg route and am fine with the 'good enough' methods outlined in many of the posts here.
1. Tram 1411 with center whip removed. Mounted ~6ft above roof line, 24ft AGL.
2. ~30ft RG-6 thru attic almost to desk area with 6ft RG-6 patch cable w/barrel connector to reach desk and devices. Close to 40ft total run. I currently use a BNC - F adapter for the scanner and a F - SMA adapter for the SDR.
3. RTL-SDR V3. I use this alot for MilAir band searches and stored freq. scanning.
4. OLD BC-950XLT. Mostly CivAir only.
5. Will add a BCT15X soon.
So, need to feed a SDR and 2 scanners. I also want to amplify the signal. As an experiment I connected a ChannelMaster CM-3414 from our OTA TV setup to the Discone then to the SDR and BC-950XLT. I was able to receive the Charleston, SC airport (KCHS) Tower (noisy but readable) and the ARTCC RCAG channels as well as the Chas. Air Force Base "Palmetto Ops" channel. I normally cannot hear those. For MilAir I am midway between 2 MOAs. The Charleston/Beaufort coastal areas (50-60 mi) and the Gamecock MOAs in the Midlands/PeeDee areas of SC (~70mi). I have had decent luck receiving A2A comms of fighters doing A2A combat training in BOTH areas but it's sketchy. I'm convinced some signal amplification and hopefully noise reduction will help.
LNA
I read MANY posts in this sub-forum about antenna splitting, TV distribution amps, LNAs, etc., to the point of info overload. I'm not a ham nor well-versed in antenna theory and the engineering level stuff but do have a grasp of the basics. It seems a LNA of some type, ideally mounted at or near the antenna will give me the best signal improvement. I have these questions/requests:
1. Recommend a reliable wideband LNA, Noise Figure <1dB, around $30 or less? Model?
2. How do I mount the thing on the mast? The simpler the better. OR, if you know of one that comes in a weatherproof enclosure please advise.
3. Power: There is power in the attic. That would be approx. 20-25ft. from the antenna. The RG6 runs through the attic. What are my options to power a LNA?
Split Antenna Feed
Assuming I get a LNA up and running I need to split the feed for 3 or (future 4?) devices listed above.
1. Will I need to attenuate?
2. With my varied radios (SDR, old and new scanners) will the attenuation need to be varied for each device?? If so what do I need to do so?
3. Or, just use a quality 4-way TV splitter and good to go?
Will greatly appreciate advice and suggestions, the simpler the better.
Ken