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-rw-r--r--kicad-dart-70/ant_switch.kicad_sch8
1 files changed, 6 insertions, 2 deletions
diff --git a/kicad-dart-70/ant_switch.kicad_sch b/kicad-dart-70/ant_switch.kicad_sch
index 8a688f4..1e0f9fa 100644
--- a/kicad-dart-70/ant_switch.kicad_sch
+++ b/kicad-dart-70/ant_switch.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")
@@ -1015,12 +1015,16 @@
(uuid f971c761-1290-4687-adad-e0546cf92762)
)
+ (text "Rev. 0 Assembled\nR165, R166 = 160R\nR170 = 91R" (at 85.09 149.86 0)
+ (effects (font (size 1 1)) (justify left bottom))
+ (uuid 55d0830d-42f7-443f-8d32-61d4940b3031)
+ )
(text "Offer either +V on TX or +V on RX\non antenna connector to control external\npreamp or PA."
(at 220.98 52.07 0)
(effects (font (size 1.27 1.27)) (justify left bottom))
(uuid 69907678-12f7-4380-91bd-fa3caa6922b6)
)
- (text "First try without fitting neither D1 nor D2, and then see if isolation is enough.\n\n+VTX 9V: Q1A conducting, V_{PIN}=0V, D4 blocking, D2 conducting, D1 blocking, D3 conducting. Antenna connected to TX.\n+VTX 0V: Q1B conducting, V_{PIN}=9V, D4 conducting, D2 blocking, D1 conducting, D3 blocking. Antenna connected to RX.\n\nBAT18: approx 1pF with 2V reverse voltage; 0.5Ohm at 10mA forward current, 0.8V drop.\n\n(9V - 5V - 0.8V) / 8mA = 400 Ohm"
+ (text "First try without fitting neither D24 nor D25, and then see if isolation is enough.\n\n+VTX 9V: Q31A conducting, V_{PIN} low, D26 blocking, D24 conducting, D25 blocking, D27 conducting. Antenna connected to TX.\n+VTX 0V: Q31B conducting, V_{PIN} high, D26 conducting, D24 blocking, D25 conducting, D27 blocking. Antenna connected to RX.\n\nBAT18: approx 1pF with 2V reverse voltage; 0.5Ohm at 10mA forward current, 0.8V drop.\n\n(9V - 5V - 0.8V) / 8mA = 400 Ohm"
(at 85.09 127 0)
(effects (font (size 1.27 1.27)) (justify left bottom))
(uuid d437a213-62ef-4c36-8319-8e53f14fca2d)