<html><head></head><body>Sadly you cannot buy harmonics and expect it to work with out a full alignment. It's not the same quality it once was.<br>
<br>
I've seen many shortcuts and issues with their designs. The ceramic caps in most of the exciter are crap and must be replaced with mica to clear up their server microphonics.<br>
<br>
You would be best served by getting a basic service monitor. There is simply no good way you'll be able to run a repeater well with out one. :(<br>
<br>
73s<br>
<br>
<br><br><div class="gmail_quote">On March 30, 2016 12:11:06 PM EDT, Skyler F <electricity440@gmail.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr">Factory tuned from the factory. And I don't even have a signal generator / counter good for RF. We got one hamtronics board, and won't buy another until we get this one working.</div><div class="gmail_extra"><br /><div class="gmail_quote">On Wed, Mar 30, 2016 at 10:08 AM, Joe Leikhim <span dir="ltr"><<a href="mailto:rhyolite@leikhim.com" target="_blank">rhyolite@leikhim.com</a>></span> wrote:<br /><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Were these receivers factory built and tuned or did individual club
members build them? Either way, you might try others from the lot.
If you have only a rudimentary signal generator and / or frequency
counter, perhaps I can walk you through some "field expedient" steps
over the phone.<div><div class="h5"><br />
<br />
<div>On 3/30/2016 12:01 PM, Skyler F wrote:<br />
</div>
<blockquote type="cite">
<div dir="ltr">I don't have the test equipment to go through all
of the dirty Local Oscilator, SINAD, etc., so I will have to
wait on that a few weeks before the president of the club gets
back in town.
<div><br />
</div>
<div>WHEN I bypassed the capacitor and resistor ( 1k and .03µ) ,
the RTCM was able to calibrate squelch. The LED flashed
several times and then was steady. Maybe the capacitor is the
wrong value. There was no code on it, but based on the
resistor code, the value was correct. </div>
<div><br />
</div>
<div>73</div>
<div>Skyler</div>
</div>
<div class="gmail_extra"><br />
<div class="gmail_quote">On Mon, Mar 28, 2016 at 4:08 PM, Joe
Leikhim <span dir="ltr"><<a href="mailto:rhyolite@leikhim.com" target="_blank">rhyolite@leikhim.com</a>></span>
wrote:<br />
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">If you are
using an external reference, you cannot make up for the 2nd
LO error if it is wildly off. There is an easy SINAD related
test in EIA-603 that is called Offset Acceptance Bandwidth
that would indicate if the IF were off center. Things that
could go wrong apart from simple misalignment of the Quad
Detector coil could include the LO crystal being way off
frequency, the IF filters being wrong BW or off spec pass
frequency.<br />
<br />
Given the symptoms, I am putting my money on a misadjusted
quad coil.<span><font color="#888888"><br />
<br />
Joe</font></span><span><br />
<br />
On 3/28/2016 5:06 PM, Bryan Fields wrote:<br />
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 3/28/16 2:51 PM, Joe Leikhim wrote:<br />
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
1) Make sure the receiver First Local Oscillator is
adjusted correctly<br />
on frequency. (Fo -10.700 MHz) Likewise the second LO
should be at<br />
around 10.2450 MHz. The second LO is not adjustable,
so any minor error<br />
would have to be made up with the TCXO U3. After this
second step:<br />
<br />
Then :<br />
<br />
2) Make sure the general alignment is set properly,
especially the<br />
discriminator coil T2 which responds to 10.7000 MHz
from a signal<br />
generator, has an S curve response. In my experience
with these sort of<br />
Quadrature Detector chips, you can get a false sense
of IF centering<br />
where the noise component is suppressed. You might try
adjusting for<br />
maximum noise first without the 10.7000 MHz signal. Be
careful you don't<br />
jam the coil slug.<br />
</blockquote>
These are both very good points i didn't consider. I
normally don't check my<br />
reference oscillators in the hamtronics as they are
using an external 10MHz<br />
source.<br />
<br />
You will want to check SINAD on it as well, if it's not
making spec (and those<br />
hamtronics are very sensitive), something else is wrong
with it.<br />
<br />
</blockquote>
<br />
-- <br />
</span><span>
Joe Leikhim<br />
<br />
<br />
Leikhim and Associates<br />
<br />
Communications Consultants<br />
<br />
Oviedo, Florida<br />
<br />
<a href="mailto:JLeikhim@Leikhim.com" target="_blank">JLeikhim@Leikhim.com</a><br />
<br />
<a href="tel:407-982-0446" value="+14079820446" target="_blank">407-982-0446</a><br />
<br />
<a href="http://WWW.LEIKHIM.COM" rel="noreferrer" target="_blank">WWW.LEIKHIM.COM</a><br />
<br />
</span>
<div>
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-- <br />
<div>
<div dir="ltr"><font color="#38761d" face="arial narrow,
sans-serif">Skyler Fennell</font>
<div><font color="#38761d" face="arial narrow, sans-serif"><a href="http://amsatnet.info" target="_blank">amsatnet.info</a></font></div>
<div><font color="#38761d" face="arial narrow, sans-serif">KDØWHB</font></div>
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<pre cols="72">--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
<a href="mailto:JLeikhim@Leikhim.com" target="_blank">JLeikhim@Leikhim.com</a>
<a href="tel:407-982-0446" value="+14079820446" target="_blank">407-982-0446</a>
<a href="http://WWW.LEIKHIM.COM" target="_blank">WWW.LEIKHIM.COM</a></pre>
</div></div></div>
</blockquote></div><br /><br clear="all" /><div><br /></div>-- <br /><div class="gmail_signature"><div dir="ltr"><font face="arial narrow, sans-serif" color="#38761d">Skyler Fennell</font><div><font face="arial narrow, sans-serif" color="#38761d"><a href="http://amsatnet.info" target="_blank">amsatnet.info</a></font></div><div><font face="arial narrow, sans-serif" color="#38761d">KDØWHB</font></div><div><font face="arial narrow, sans-serif" color="#38761d"><a href="mailto:electricity440@gmail.com" target="_blank">electricity440@gmail.com</a></font></div></div></div>
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<p style="margin-top: 2.5em; margin-bottom: 1em; border-bottom: 1px solid #000"></p><pre class="k9mail"><hr /><br />App_rpt-users mailing list<br />App_rpt-users@ohnosec.org<br /><a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br /><br />To unsubscribe from this list please visit <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a> and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"<br />You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. </pre></blockquote></div><br>
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