1.  Others estimate higher max frequency.  This one&#x27;s on the high side of estimates:<p><a href="http:&#x2F;&#x2F;dangerousprototypes.com&#x2F;2011&#x2F;12&#x2F;05&#x2F;breadboard-limitations&#x2F;" rel="nofollow">http:&#x2F;&#x2F;dangerousprototypes.com&#x2F;2011&#x2F;12&#x2F;05&#x2F;breadboard-limitat...</a>
[might have to ask EE friends about transmission line termination at those frequencies]<p>2.  See also this video (and comments on video) where they measure:<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=6GIscUsnlM0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=6GIscUsnlM0</a>