diff --git a/2118-2128.tex b/2118-2128.tex
index a2336d2..5252fb4 100644
--- a/2118-2128.tex
+++ b/2118-2128.tex
@@ -400,7 +400,7 @@ and the isolator IC (SI8651BB-B-IS1\footnote{\label{isolator}https://www.skywork
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{sma_ttl_drawings.jpg}
+    \includegraphics[height=3in]{sma_ttl_drawings.pdf}
     \captionof{figure}{2128 SMA-TTL front panel drawings}
 \end{center}
 
@@ -420,7 +420,7 @@ and the isolator IC (SI8651BB-B-IS1\footnote{\label{isolator}https://www.skywork
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{sma_ttl_assembly.jpg}
+    \includegraphics[height=3in]{sma_ttl_assembly.pdf}
     \captionof{figure}{2128 SMA-TTL front panel assembly}
 \end{center}
 
diff --git a/4410-4412.tex b/4410-4412.tex
index 8d6ec07..4bc5c91 100644
--- a/4410-4412.tex
+++ b/4410-4412.tex
@@ -647,7 +647,7 @@ Harmonic content of the DDS signals from 4410 Urukul is tabulated below\footnote
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{dds_drawings.jpg}
+    \includegraphics[height=3in]{dds_drawings.pdf}
     \captionof{figure}{4410 DDS Urukul front panel drawings}
 \end{center}
 
@@ -667,7 +667,7 @@ Harmonic content of the DDS signals from 4410 Urukul is tabulated below\footnote
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{dds_assembly.jpg}
+    \includegraphics[height=3in]{dds_assembly.pdf}
     \captionof{figure}{4410 DDS Urukul front panel assembly}
 \end{center}
 
diff --git a/5108.tex b/5108.tex
index 7147ef0..fe50583 100644
--- a/5108.tex
+++ b/5108.tex
@@ -539,7 +539,7 @@ Bandwidth of small signal and large signal input is shown below\repeatfootnote{s
 
 \begin{center}
     \centering
-    \includegraphics[height=2.7in]{sampler_drawings.jpg}
+    \includegraphics[height=2.7in]{sampler_drawings.pdf}
     \captionof{figure}{5108 Sampler front panel drawings}
 \end{center}
 
@@ -547,7 +547,7 @@ Bandwidth of small signal and large signal input is shown below\repeatfootnote{s
 
 \begin{center}
     \centering
-    \includegraphics[height=2.7in]{sampler_assembly.jpg}
+    \includegraphics[height=2.7in]{sampler_assembly.pdf}
     \captionof{figure}{5108 Sampler front panel assembly}
 \end{center}
 
diff --git a/5432.tex b/5432.tex
index 91f934d..3cf01cf 100644
--- a/5432.tex
+++ b/5432.tex
@@ -256,7 +256,7 @@ Far-end crosstalk is measured using the following setup\repeatfootnote{zotino21}
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{zotino_drawings.jpg}
+    \includegraphics[height=3in]{zotino_drawings.pdf}
     \captionof{figure}{5432 DAC Zotino front panel drawings}
 \end{center}
 
@@ -276,7 +276,7 @@ Far-end crosstalk is measured using the following setup\repeatfootnote{zotino21}
 
 \begin{center}
     \centering
-    \includegraphics[height=3in]{zotino_assembly.jpg}
+    \includegraphics[height=3in]{zotino_assembly.pdf}
     \captionof{figure}{5432 DAC Zotino front panel assembly}
 \end{center}
 
diff --git a/dds_assembly.jpg b/dds_assembly.jpg
deleted file mode 100644
index af5a86c..0000000
Binary files a/dds_assembly.jpg and /dev/null differ
diff --git a/dds_assembly.pdf b/dds_assembly.pdf
new file mode 100644
index 0000000..2e79cff
Binary files /dev/null and b/dds_assembly.pdf differ
diff --git a/dds_drawings.jpg b/dds_drawings.jpg
deleted file mode 100644
index 7b77986..0000000
Binary files a/dds_drawings.jpg and /dev/null differ
diff --git a/dds_drawings.pdf b/dds_drawings.pdf
new file mode 100644
index 0000000..4dd8f0e
Binary files /dev/null and b/dds_drawings.pdf differ
diff --git a/sampler_assembly.jpg b/sampler_assembly.jpg
deleted file mode 100644
index ae5bc4f..0000000
Binary files a/sampler_assembly.jpg and /dev/null differ
diff --git a/sampler_assembly.pdf b/sampler_assembly.pdf
new file mode 100644
index 0000000..e80336f
Binary files /dev/null and b/sampler_assembly.pdf differ
diff --git a/sampler_drawings.jpg b/sampler_drawings.jpg
deleted file mode 100644
index 295aedb..0000000
Binary files a/sampler_drawings.jpg and /dev/null differ
diff --git a/sampler_drawings.pdf b/sampler_drawings.pdf
new file mode 100644
index 0000000..8a26bb7
Binary files /dev/null and b/sampler_drawings.pdf differ
diff --git a/sma_ttl_assembly.jpg b/sma_ttl_assembly.jpg
deleted file mode 100644
index 2deea96..0000000
Binary files a/sma_ttl_assembly.jpg and /dev/null differ
diff --git a/sma_ttl_assembly.pdf b/sma_ttl_assembly.pdf
new file mode 100644
index 0000000..968ed22
Binary files /dev/null and b/sma_ttl_assembly.pdf differ
diff --git a/sma_ttl_drawings.jpg b/sma_ttl_drawings.jpg
deleted file mode 100644
index 5e3afd2..0000000
Binary files a/sma_ttl_drawings.jpg and /dev/null differ
diff --git a/sma_ttl_drawings.pdf b/sma_ttl_drawings.pdf
new file mode 100644
index 0000000..ba3e0ec
Binary files /dev/null and b/sma_ttl_drawings.pdf differ
diff --git a/zotino_assembly.jpg b/zotino_assembly.jpg
deleted file mode 100644
index 29b6a5b..0000000
Binary files a/zotino_assembly.jpg and /dev/null differ
diff --git a/zotino_assembly.pdf b/zotino_assembly.pdf
new file mode 100644
index 0000000..15f55fb
Binary files /dev/null and b/zotino_assembly.pdf differ
diff --git a/zotino_drawings.jpg b/zotino_drawings.jpg
deleted file mode 100644
index bc95ff5..0000000
Binary files a/zotino_drawings.jpg and /dev/null differ
diff --git a/zotino_drawings.pdf b/zotino_drawings.pdf
new file mode 100644
index 0000000..f0076cd
Binary files /dev/null and b/zotino_drawings.pdf differ