From d95b85e2c3d84c5c3b235d1a07b49af421e0bae2 Mon Sep 17 00:00:00 2001
From: Vadim Kuznetsov <ra3xdh@gmail.com>
Date: Tue, 19 Mar 2024 16:02:15 +0300
Subject: [PATCH] Backport StoT fix from @thliebig

---
 src/math/matrix.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/math/matrix.cpp b/src/math/matrix.cpp
index 8ff178e6..7b68fea6 100644
--- a/src/math/matrix.cpp
+++ b/src/math/matrix.cpp
@@ -1933,7 +1933,7 @@ matrix twoport (matrix m, char in, char out) {
       res.set (0, 0, m (0, 1) - m (0, 0) * m (1, 1) / d);
       res.set (0, 1, m (0, 0) / d);
       res.set (1, 0, -m (1, 1) / d);
-      res.set (0, 1, 1.0 / d);
+      res.set (1, 1, 1.0 / d);
       break;
     case 'A': // S to A
       res = stoa (m);
@@ -1959,7 +1959,7 @@ matrix twoport (matrix m, char in, char out) {
       res.set (0, 0, m (0, 1) / d);
       res.set (0, 1, m (0, 0) - m (0, 1) * m (1, 0) / d);
       res.set (1, 0, 1.0 / d);
-      res.set (0, 1, -m (1, 0) / d);
+      res.set (1, 1, -m (1, 0) / d);
       break;
     case 'T': // T to T
       res = m;