--- a/content/10MHz_ref.rst	Sat Mar 12 17:37:51 2016 +0100
+++ b/content/10MHz_ref.rst	Tue Mar 15 16:23:22 2016 +0100
@@ -30,7 +30,7 @@
 .. image:: {filename}images/freq_ref/efratom_sticker.jpg
    :alt: The Efratom LPRO-101 frequency standard.
 
-Inside the enclosure, there is a single PCB with SMD and trough hole
+Inside the enclosure, there is a single PCB with SMD and through hole
 components. It's quite dense.
 
 .. image:: {filename}images/freq_ref/efratom_inside.jpg
@@ -80,7 +80,8 @@
 16:
 
 .. image:: {filename}images/freq_ref/lt1616_bipolar_output_DC2DC.svg
-   :alt: LT1616 Bipolr Output DC/DC converter.
+   :alt: LT1616 Bipolar Output DC/DC converter.
+   :align: center
 
 It produces +/-5V from the 12V input. But still, I did not know what
 kind of inductor/xformer I should use. I did not notice at first sight