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LAA+ FM broadcast interference using SDRplay Bias-T but goes away using 12v Bias-T power inserter?
Eric Chris answered your question. To help stop intermod from strong stations the amp likes 12v rather than 5v. As you have noticed it goes away when using 12v..so may i suggest you use the 12v tee ra
Eric Chris answered your question. To help stop intermod from strong stations the amp likes 12v rather than 5v. As you have noticed it goes away when using 12v..so may i suggest you use the 12v tee ra
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By
Simon
· #7513
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Web sdr for me till new year..
Some complete @&@8 has put up some ( i hope.) dodgy xmas lights..s9+ all across the bands.makes the existing smpsu noise look silly! making yet another phaser..To phase this out?? i already hated xmas
Some complete @&@8 has put up some ( i hope.) dodgy xmas lights..s9+ all across the bands.makes the existing smpsu noise look silly! making yet another phaser..To phase this out?? i already hated xmas
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By
Simon
· #7511
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How to make a cardioid loop with a Loop Antenna Amplifier +
Oh i forgot to add..if buying resistors from ebay or wherever make sure they are NOT Wirewound type..
Oh i forgot to add..if buying resistors from ebay or wherever make sure they are NOT Wirewound type..
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By
Simon
· #7509
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How to make a cardioid loop with a Loop Antenna Amplifier +
Ideally solder it on..but to try it out an electrical choc block thingy will do .( typically white or black small block with little screws in, used to join cables together in house wiring junction box
Ideally solder it on..but to try it out an electrical choc block thingy will do .( typically white or black small block with little screws in, used to join cables together in house wiring junction box
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By
Simon
· #7508
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Noise antenna..
Hi Tom This is not xmas lights but their outside lights..”up lights” on their exterior walls making their house look nice.. Been there for years, but getting worse as time goes by. Will post a pic of
Hi Tom This is not xmas lights but their outside lights..”up lights” on their exterior walls making their house look nice.. Been there for years, but getting worse as time goes by. Will post a pic of
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By
Simon
· #7505
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Noise antenna..
Nothing then??? ok update..have found source of noise..well almost..its either house A or B. Both directly opposite each other, Both have led up lights on side of house..about 70m sw of me.. will work
Nothing then??? ok update..have found source of noise..well almost..its either house A or B. Both directly opposite each other, Both have led up lights on side of house..about 70m sw of me.. will work
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By
Simon
· #7501
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Noise antenna..
Looking for ideas ( that i have not already tried,) for noise antenna to feed a phaser..in the attempt to null out a smpsu on 1845-1855khz.. this noise varies in amplitude and frequency depending upon
Looking for ideas ( that i have not already tried,) for noise antenna to feed a phaser..in the attempt to null out a smpsu on 1845-1855khz.. this noise varies in amplitude and frequency depending upon
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By
Simon
· #7497
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Tips to improve LAA+ Performance?
The amp likes low inductance.. So bigger dia tubing the better (there is a point of low return though..ie dont be silly and use 3 inch tubing.) To improve more then use 2 or 3 loops in parallel, space
The amp likes low inductance.. So bigger dia tubing the better (there is a point of low return though..ie dont be silly and use 3 inch tubing.) To improve more then use 2 or 3 loops in parallel, space
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By
Simon
· #7480
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Loop above gnd.height vs take off angle
Hi Chris Interesting..not concerned about hf..have fan dipoles for them and the existing loops. Ok will give this a go tomorrow..( bigger loop on cardioid.)though it may well end up being square in sh
Hi Chris Interesting..not concerned about hf..have fan dipoles for them and the existing loops. Ok will give this a go tomorrow..( bigger loop on cardioid.)though it may well end up being square in sh
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By
Simon
· #7470
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Loop above gnd.height vs take off angle
Thank you Chris.much appreciated.. Ok then..160m only. So my parallel crossed loop has to go or better be used for the noise antenna..shame..stunningly good for Europe..( or switched for Europe only.)
Thank you Chris.much appreciated.. Ok then..160m only. So my parallel crossed loop has to go or better be used for the noise antenna..shame..stunningly good for Europe..( or switched for Europe only.)
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By
Simon
· #7467
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Loop above gnd.height vs take off angle
Kool Thank you Simon
By
Simon
· #7462
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Loop above gnd.height vs take off angle
Any info on this?? ie 160m dx LOW angle.. gnd mounted loop vs 5m above gnd loop.. can not find any info in net..atleast not for small active loops.. Simon
Any info on this?? ie 160m dx LOW angle.. gnd mounted loop vs 5m above gnd loop.. can not find any info in net..atleast not for small active loops.. Simon
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By
Simon
· #7460
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Loop height above gnd and 2 loops
Any thoughts???? thank you...
Any thoughts???? thank you...
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By
Simon
· #7459
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Loop height above gnd and 2 loops
Hello again..been refreshing my memory.. May have an issue..loops will need ( even 2.) to be in line with direction i wish to hear in..this i think here will be nigh on impossible..i can add loops bro
Hello again..been refreshing my memory.. May have an issue..loops will need ( even 2.) to be in line with direction i wish to hear in..this i think here will be nigh on impossible..i can add loops bro
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By
Simon
· #7444
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Loop height above gnd and 2 loops
Might need to make this clearer when i say quad loops i mean see attached pic
Might need to make this clearer when i say quad loops i mean see attached pic
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By
Simon
· #7443
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Loop height above gnd and 2 loops
Like the photo!!( military base?!! Was looking at similar on Cornwall coast..ex or maybe still used massive towers..over looking sea..there is more than one..Mary even says yes to buying one!!( once w
Like the photo!!( military base?!! Was looking at similar on Cornwall coast..ex or maybe still used massive towers..over looking sea..there is more than one..Mary even says yes to buying one!!( once w
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By
Simon
· #7442
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Loop height above gnd and 2 loops
Hi Martin Yes it seems to work very well, atleast on frequency that i wanted to use it on.1845-50khz I do need to add gain to the noise antenna..currently it is 6s points down on the main antenna, but
Hi Martin Yes it seems to work very well, atleast on frequency that i wanted to use it on.1845-50khz I do need to add gain to the noise antenna..currently it is 6s points down on the main antenna, but
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By
Simon
· #7440
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Loop height above gnd and 2 loops
Hi Chris and Martin well been busy.. made a new phaser..old one was top of Martins page..the vk5 one.. it was always abit crap..but had nothing to compare it with.. made a wa1ion phaser..using main ma
Hi Chris and Martin well been busy.. made a new phaser..old one was top of Martins page..the vk5 one.. it was always abit crap..but had nothing to compare it with.. made a wa1ion phaser..using main ma
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By
Simon
· #7435
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LAA+ gain control
Hi If you have some 31 mix add them as well..in series with the 43’s. 31’s tend to work better lf than 43’s. Glad its going in the right direction! I am always at war with noise..one sorts it out, the
Hi If you have some 31 mix add them as well..in series with the 43’s. 31’s tend to work better lf than 43’s. Glad its going in the right direction! I am always at war with noise..one sorts it out, the
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By
Simon
· #7424
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LLA+ gain control
Another thing to try if not done already. Run everything that is 12v from a car battery..see what happens.. If goes down then it’s something that can be improved..ie a decent mains filter.. I assume y
Another thing to try if not done already. Run everything that is 12v from a car battery..see what happens.. If goes down then it’s something that can be improved..ie a decent mains filter.. I assume y
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By
Simon
· #7420
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