diff --git a/portfolio/jp/radio.html b/portfolio/jp/radio.html
index 3830d25..c2ede72 100644
--- a/portfolio/jp/radio.html
+++ b/portfolio/jp/radio.html
@@ -37,3 +37,5 @@ $for(fielddays)$
 $endfor$
 </table>
 
+<h2>外部リンク</h2>
+$partial("templates/radio-external-links.html")$
diff --git a/portfolio/nl/radio.html b/portfolio/nl/radio.html
index 44e6c3b..894446f 100644
--- a/portfolio/nl/radio.html
+++ b/portfolio/nl/radio.html
@@ -37,3 +37,5 @@ $for(fielddays)$
 $endfor$
 </table>
 
+<h2>Externe links</h2>
+$partial("templates/radio-external-links.html")$
diff --git a/portfolio/templates/radio-external-links.html b/portfolio/templates/radio-external-links.html
new file mode 100644
index 0000000..93b709c
--- /dev/null
+++ b/portfolio/templates/radio-external-links.html
@@ -0,0 +1,43 @@
+<div class="container text-left">
+  <div class="row row-cols-1 row-cols-md-2 row-cols-lg-3">
+    <div class="col d-flex">
+      <ul>
+        <li><a href="https://www.qrz.com/db/PA4KEV" class="external" aria-label="q r z dot com slash p a 4 k e v (opens external site in new tab)" target="_blank" rel="noopener noreferrer">qrz.com/db/PA4KEV</a></li>
+        <li><a href="https://www.eqsl.cc/" class="external" aria-label="e q s l dot c c (opens external site in new tab)" target="_blank" rel="noopener noreferrer">eqsl.cc</a></li>
+        <li><a href="http://www.hamqsl.com/" class="external" aria-label="ham q s l dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">hamqsl.com</a></li>
+        <li><a href="http://www.hrdlog.net/" class="external" aria-label="h r d log dot net (opens external site in new tab)" target="_blank" rel="noopener noreferrer">hrdlog.net</a></li>
+      </ul>
+    </div>
+    <div class="col d-flex">
+      <ul>
+        <li><a href="https://www.dj0ip.de/" class="external" aria-label="d j 0 i p dot d e (opens external site in new tab)" target="_blank" rel="noopener noreferrer">dj0ip.de</a></li>
+        <li><a href="http://pa0ebc.nl/pe1kqp/s-match-tuner.html" class="external" aria-label="p a 0 e b c dot n l (opens external site in new tab)" target="_blank" rel="noopener noreferrer">pa0ebc.nl/pe1kqp/s-match-tuner</a></li>
+        <li><a href="https://www.pc5e.nl/" class="external" aria-label="p c 5 e dot n l (opens external site in new tab)" target="_blank" rel="noopener noreferrer">pc5e.nl</a></li>
+        <li><a href="http://www.pd0cq.nl/" class="external" aria-label="p d 0 c q dot n l (opens external site in new tab)" target="_blank" rel="noopener noreferrer">pd0cq.nl</a></li>
+        <li><a href="https://www.qsl.net/on7px/" class="external" aria-label="q s l dot net slash o n 7 p x (opens external site in new tab)" target="_blank" rel="noopener noreferrer">qsl.net/on7px</a></li>
+        <li><a href="https://vk2pad.com/" class="external" aria-label="v k 2 p a d dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">vk2pad.com</a></li>
+        <li><a href="https://www.qrz.com/db/vk0pd" class="external" aria-label="q r z dot com v k 0 p d antarctica (opens external site in new tab)" target="_blank" rel="noopener noreferrer">qrz.com/db/vk0pd (Antarctica)</a></li>
+        <li><a href="http://www.waponline.it/antarctic-info-for-ham-radio/" class="external" aria-label="waponline dot i t antarctica (opens external site in new tab)" target="_blank" rel="noopener noreferrer">waponline.it/antarctic-info-for-ham-radio (Antarctica)</a></li>
+        <li><a href="https://www.signalintegrityjournal.com/" class="external" aria-label="signalintegrityjournal dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">signalintegrityjournal.com</a></li>
+        <li><a href="https://www.dspguide.com/" class="external" aria-label="d s p guide dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">dspguide.com</a></li>
+      </ul>
+    </div>
+    <div class="col d-flex">
+      <ul>
+        <li><a href="https://fieldradio.org/best-ham-radio-antenna-for-apartments/" class="external" aria-label="field radio dot org (opens external site in new tab)" target="_blank" rel="noopener noreferrer">fieldradio.org/best-ham-radio-antenna-for-apartments</a></li>
+        <li><a href="https://en.wikipedia.org/wiki/J-pole_antenna" class="external" aria-label="wikipedia j pole antenna (opens external site in new tab)" target="_blank" rel="noopener noreferrer">wikipedia.org/wiki/J-pole_antenna</a></li>
+        <li><a href="https://www.amateurradio.com/w5olf-website/" class="external" aria-label="amateur radio dot com w 5 o l f (opens external site in new tab)" target="_blank" rel="noopener noreferrer">amateurradio.com/w5olf-website/</a></li>
+        <li><a href="https://www.qrp-labs.com/clockn.html" class="external" aria-label="q r p labs dot com slash clock n (opens external site in new tab)" target="_blank" rel="noopener noreferrer">qrp-labs.com/clockn</a></li>
+        <li><a href="http://sdr.shbrg.nl:8074/" class="external" aria-label="s d r dot s h b r g dot n l (opens external site in new tab)" target="_blank" rel="noopener noreferrer">sdr.shbrg.nl:8074</a></li>
+        <li><a href="http://websdr.ewi.utwente.nl:8901/" class="external" aria-label="web s d r dot e w i dot u twente dot n l (opens external site in new tab)" target="_blank" rel="noopener noreferrer">websdr.ewi.utwente.nl:8901</a></li>
+        <li><a href="https://pa-11019.blogspot.com/2016/02/wall-loop-20m.html?m=1" class="external" aria-label="p a 1 1 0 1 9 dot blogspot dot com wall loop 20 meter (opens external site in new tab)" target="_blank" rel="noopener noreferrer">pa-11019.blogspot.com/2016/02/wall-loop-20m</a></li>
+        <li><a href="https://morsecode.world/" class="external" aria-label="morsecode dot world (opens external site in new tab)" target="_blank" rel="noopener noreferrer">morsecode.world</a></li>
+        <li><a href="https://morsecode.ninja/" class="external" aria-label="morsecode dot ninja (opens external site in new tab)" target="_blank" rel="noopener noreferrer">morsecode.ninja</a></li>
+        <li><a href="http://www.morserino.info/" class="external" aria-label="morserino dot info (opens external site in new tab)" target="_blank" rel="noopener noreferrer">morserino.info</a></li>
+        <li><a href="https://www.n3fjp.com/" class="external" aria-label="n 3 f j p dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">n3fjp.com</a></li>
+        <li><a href="https://www.hamradiodeluxe.com/" class="external" aria-label="ham radio deluxe dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">hamradiodeluxe.com</a></li>
+        <li><a href="https://n1mmwp.hamdocs.com/" class="external" aria-label="n 1 m m w p dot ham docs dot com (opens external site in new tab)" target="_blank" rel="noopener noreferrer">n1mmwp.hamdocs.com</a></li>
+      </ul>
+    </div>
+  </div>
+</div>
\ No newline at end of file