diff --git a/gui/src/index.html b/gui/src/index.html
index 981ddc1d..e988975d 100644
--- a/gui/src/index.html
+++ b/gui/src/index.html
@@ -504,7 +504,7 @@
                      <div class="row">
                         <div class="col-md-auto">
                            <div class="input-group input-group-sm mb-0">
-                              <input type="text" class="form-control" style="max-width: 6rem" placeholder="callsign" pattern="[A-Z]*" id="myCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
+                              <input type="text" class="form-control" style="max-width: 6rem; text-transform:uppercase" placeholder="callsign" pattern="[A-Z]*" id="myCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
                               <button class="btn btn-success" id="saveMyCall" type="button">
                                  <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-check2" viewBox="0 0 16 16">
                                     <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
@@ -535,7 +535,7 @@
                         <div class="col-md-auto">
                            <div class="input-group input-group-sm mb-0">
                               <span class="input-group-text">Ping</span>
-                              <input type="text" class="form-control" style="max-width: 6rem" placeholder="DXcall" pattern="[A-Z]*" id="dxCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
+                              <input type="text" class="form-control" style="max-width: 6rem; text-transform:uppercase" placeholder="DXcall" pattern="[A-Z]*" id="dxCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
                               <button class="btn btn-success" id="sendPing" type="button">
                                  <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-check2" viewBox="0 0 16 16">
                                     <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z"/>
@@ -623,7 +623,7 @@
                                 <div class="row">
                                     <div class="col-auto">
                                          <div class="input-group input-group-sm mb-0">
-                                                                  <input type="text" class="form-control" style="max-width: 6rem" pattern="[A-Z]" placeholder="DXcall" id="dataModalDxCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
+                                                                  <input type="text" class="form-control" style="max-width: 6rem; text-transform:uppercase" pattern="[A-Z]" placeholder="DXcall" id="dataModalDxCall" maxlength="6" aria-label="Input group example" aria-describedby="btnGroupAddon">
                                          </div>
                                  </div>
 
@@ -698,7 +698,7 @@
                     <div class="col">
 
 
-                                                <button type="button" id="startTransmission" class="btn btn-success" style="width:100%">START TRANSMISSION</button>
+                                                <button type="button" id="startTransmission" class="btn btn-success" style="width:100%" disabled>START TRANSMISSION</button>