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The Aero Thread..
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<blockquote data-quote="Vipersan" data-source="post: 974780" data-attributes="member: 325666"><p>Feeling a bit sorry for myself today ...having parted with about a beaker full of blood over the last 24 hours ..</p><p>Folling a visit to the dentist and 1x wisdom and one molar removed ..</p><p>Nonetheless I did manage to play out in the sun for an hour or so ...but still can't eat yet ..</p><p>doh ..</p><p>water or luke warm tea ..</p><p>Ok ..So I got my second LNA4ALL ...and already have a 1.5ghz filter from LB ...</p><p>also have one from Adam ...as he posted me one of his construction as well ..</p><p>So 2 filters to choose from ..</p><p>both are have the active path at DC ground ..so I needed to jump the 4.5v supply from the Bias T of LNA1 to power LNA 2</p><p>LNA1 being closest to Airspy ..</p><p>LNA2 being isolated somewhat and directly connected to the Helical element</p><p>LNA 2 is also screened inside a seperate metal box ..</p><p>LNA1 and the filter are exposed to the elements atm ...but will eventually be inside the diecast box ..as will all the RF elements ..</p><p>They wont fit in atm although close ...due to extra sma straight couplers needing to be employed..(taking up valuable space)</p><p>I have a dozen right angled Male to Male couplings on order but these will be at least 2 weeks arriving from China.</p><p>So ..a photo of the plumbing arrangenents as they currently are ...I have tried both filtes ...and so far LBs appears to have the edge ...</p><p>RFI appears lower ...vut the extra DB gain still makes for scrappy and occasional data received ..</p><p>Most of the time Jaero fills up with CRC or Souncard buffer errors ...but the three target peaks appear to be about 8db tall now ..</p><p>So I am at a loss to explain why this is so ..?</p><p>I still think this may be as a result of footprint and that I am indeed 'fringe'..</p><p></p><p>The phrase being ..you simply can't polish a turd ...</p><p>No amount of amplification will help if the signal is poor or corrupt at the point of reception ..</p><p>you simply amplify the errors along with the good stuff ..</p><p>(fingers crossed I am wrong about this)</p><p>Here are the pix..</p><p></p><p>Helical Element > LNA 2 > Filter > LNA 1 > Airspy[ATTACH=full]94138[/ATTACH]</p></blockquote><p></p>
[QUOTE="Vipersan, post: 974780, member: 325666"] Feeling a bit sorry for myself today ...having parted with about a beaker full of blood over the last 24 hours .. Folling a visit to the dentist and 1x wisdom and one molar removed .. Nonetheless I did manage to play out in the sun for an hour or so ...but still can't eat yet .. doh .. water or luke warm tea .. Ok ..So I got my second LNA4ALL ...and already have a 1.5ghz filter from LB ... also have one from Adam ...as he posted me one of his construction as well .. So 2 filters to choose from .. both are have the active path at DC ground ..so I needed to jump the 4.5v supply from the Bias T of LNA1 to power LNA 2 LNA1 being closest to Airspy .. LNA2 being isolated somewhat and directly connected to the Helical element LNA 2 is also screened inside a seperate metal box .. LNA1 and the filter are exposed to the elements atm ...but will eventually be inside the diecast box ..as will all the RF elements .. They wont fit in atm although close ...due to extra sma straight couplers needing to be employed..(taking up valuable space) I have a dozen right angled Male to Male couplings on order but these will be at least 2 weeks arriving from China. So ..a photo of the plumbing arrangenents as they currently are ...I have tried both filtes ...and so far LBs appears to have the edge ... RFI appears lower ...vut the extra DB gain still makes for scrappy and occasional data received .. Most of the time Jaero fills up with CRC or Souncard buffer errors ...but the three target peaks appear to be about 8db tall now .. So I am at a loss to explain why this is so ..? I still think this may be as a result of footprint and that I am indeed 'fringe'.. The phrase being ..you simply can't polish a turd ... No amount of amplification will help if the signal is poor or corrupt at the point of reception .. you simply amplify the errors along with the good stuff .. (fingers crossed I am wrong about this) Here are the pix.. Helical Element > LNA 2 > Filter > LNA 1 > Airspy[ATTACH=full]94138[/ATTACH] [/QUOTE]
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