From 2966b6e4493248fa970de124c4721f826fd2e9a9 Mon Sep 17 00:00:00 2001
From: Alan Johnston <alan.b.johnston@gmail.com>
Date: Sun, 19 Jul 2026 09:29:51 -0400
Subject: [PATCH] Update transmit.py add ISS frequencies

---
 transmit.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/transmit.py b/transmit.py
index e79db1fe..0b6cb060 100644
--- a/transmit.py
+++ b/transmit.py
@@ -534,8 +534,12 @@ def update_doppler(fm="yes"):
 		print(f"New vfoA: {vfoA_frequency}, new vfoB: {vfoB_frequency}")
 
 		if rigctl:
-			tx_center = 145960000 # AO-73
-			rx_center = 435140000
+			if (vfoB_frequency > 145880000):
+				tx_center = 145960000 # AO-91
+				rx_center = 435250000 # AO-73 is same tx_center but 435140000
+			else:
+				tx_center = 145800000 # ISS U/V Repeater
+				rx_center = 437800000 				
 			tx_doppler_shift = vfoB_frequency - tx_center
 			rx_doppler_shift = -1 * (rx_center/tx_center) * tx_doppler_shift
 			new_tx_frequency = vfoB_frequency