<div dir="auto">Thanks. <div dir="auto">Appreciate the correction. </div><div dir="auto">Cheers</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Dec 24, 2017 6:17 PM, "Bob Haskell" <<a href="mailto:rchaskell@earthlink.net">rchaskell@earthlink.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ira,<br>
<br>
BJ8 tach is electrical, no cable from the distributor drive. So you would need to simulate the primary circuit through the induction coil of the tachometer.<br>
<br>
Just guessing, a zero to 12 volt square wave at a frequency of something like:<br>
<br>
3000 engine rev/min 1 dizzy revolution<br>
------------------- * ------------------- * 6 cylinder = 150 Hz.<br>
60 sec/min 2 engine revolution<br>
<br>
As Kees suggested - in a car would probably be easier.<br>
<br>
Cheers,<br>
<br>
Bob Haskell<br>
AHCA 3000 MkI registrar<br>
<a href="http://www.ciahc.org/registry_3000mk1.php" rel="noreferrer" target="_blank">http://www.ciahc.org/registry_<wbr>3000mk1.php</a><br>
<br>
On 12/24/2017 06:41 PM, i erbs wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Drill motor connected to cable. Or just spin the cable with your fingers to detect movement. If it spins, could be angle drive or bad cable.<br>
<br>
On Dec 24, 2017 3:08 PM, "Bruce Peters" <<a href="mailto:rv9aplane@gmail.com" target="_blank">rv9aplane@gmail.com</a> <mailto:<a href="mailto:rv9aplane@gmail.com" target="_blank">rv9aplane@gmail.com</a>>> wrote:<br>
<br>
How does one go about testing a tachometer (‘67 BJ8) to see if it’s<br>
functional?<br>
<br>
Thanks and Merry Christmas!<br>
<br>
Bruce<br>
<br>
Sent from my iPad<br>
______________________________<wbr>_________________<br>
</blockquote>
</blockquote></div></div>