From 1e663dad9ea457c618b7942179055319fcfcdfe4 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Thu, 13 Apr 2023 16:26:55 +0200
Subject: Assemble TX FE and update comments

---
 kicad-dart-70/frontend_70.kicad_sch | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

(limited to 'kicad-dart-70/frontend_70.kicad_sch')

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)
-- 
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