diff options
Diffstat (limited to 'kicad-dart-70/ant_switch.kicad_sch')
| -rw-r--r-- | kicad-dart-70/ant_switch.kicad_sch | 8 |
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) |