diff options
Diffstat (limited to 'kicad-dart-70/frontend_70.kicad_sch')
| -rw-r--r-- | kicad-dart-70/frontend_70.kicad_sch | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/kicad-dart-70/frontend_70.kicad_sch b/kicad-dart-70/frontend_70.kicad_sch index 41d4d5a..b863106 100644 --- a/kicad-dart-70/frontend_70.kicad_sch +++ b/kicad-dart-70/frontend_70.kicad_sch @@ -6,7 +6,7 @@ (title_block (title "DART-70 TRX") - (date "2023-04-07") + (date "2023-04-10") (rev "1") (company "HB9EGM") (comment 1 "A 4m Band SSB/CW Transceiver") @@ -2127,6 +2127,11 @@ (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid 260b3d6d-8cd9-4800-8937-c0409e2ee02d) ) + (text "Rev.0 assembled with\nC133 shorted, no output filter\n" + (at 264.16 163.83 0) + (effects (font (size 0.8 0.8)) (justify left bottom)) + (uuid 26bb5a1d-db2c-4a6b-9eba-d7e2ac5d1f96) + ) (text "Calculated values for\n3rd order Chebychev, shunt first\nPassband 66MHz .. 74MHz, Bandpass Ripple 0.2dB:\n\nshunt 488pF 10nH\nseries 4.7pF 1150uH (12T on 8mm former, 12mm length, 41cm wire length)\n\nThis was too low in frequency" (at 23.495 96.52 0) (effects (font (size 1 1)) (justify left bottom)) @@ -2140,9 +2145,9 @@ (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid 49280407-40ca-40ad-b550-c8e0a5ba5bec) ) - (text "TODO\nfind bias point for BSV52\n aim for I_{C} = 10mA" - (at 88.9 194.31 0) - (effects (font (size 2 2)) (justify left bottom)) + (text "Bias point for BSV52\n aim for I_{C} = 10mA\n with R135=4.7k, measure 0.45V V_{E}, I_{C} = 37mA\n with R135=5.6k, same\nLeft 5.6k\n " + (at 129.54 180.975 0) + (effects (font (size 1.2 1.2)) (justify left bottom)) (uuid 4c91f99c-b34d-4969-97d5-5270c851233c) ) (text "http://w7zoi.net/lna50.pdf\n\nChange R_{B} to have 4V at top gate.\n\nDecrease R_{S} to have I_{D} around 5 to 6 mA.\nTry 68 Ohm." @@ -2164,6 +2169,11 @@ (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid a30cddd0-0438-4b2d-9649-32a0ca0524d8) ) + (text "Rev. 0\nassembled\nC98, C102 = 33pF\nC97, C104 = 5pF\nC100 = 4pF\nMeasured -6dB at 70MHz with LQW inductors.\nThen used 5T air coils on 6mm former. Oscillation at 76MHz due to L36.\nReplaced L36 by BLM 0603 ferrite.\nBodged in a JZ trim cap instead of C120, tune to 70MHz" + (at 53.975 184.785 0) + (effects (font (size 1 1)) (justify left bottom)) + (uuid aa2e1f3c-d617-48f8-9213-95c523ebe363) + ) (text "0.1V" (at 201.93 151.13 0) (effects (font (size 1.27 1.27)) (justify left bottom)) (uuid b4920cd9-e2c8-4eb6-ae7f-eeaebfb2a089) @@ -5624,10 +5634,10 @@ (symbol (lib_id "Device:R") (at 170.18 154.94 180) (unit 1) (in_bom yes) (on_board yes) (dnp no) (fields_autoplaced) (uuid ea787026-7b61-4bb4-bd75-934472c94939) - (property "Reference" "R130" (at 172.72 153.6699 0) + (property "Reference" "R130" (at 172.72 154.305 0) (effects (font (size 1.27 1.27)) (justify right)) ) - (property "Value" "DNF" (at 172.72 156.2099 0) + (property "Value" "3M" (at 172.72 156.845 0) (effects (font (size 1.27 1.27)) (justify right)) ) (property "Footprint" "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" (at 171.958 154.94 90) |