<div dir="ltr">Funny. A co-worker of mine 25 years ago bought an MFJ TNC that was a clone of the TAPR-2 TNC. Same issues: Poor solder joints everywhere. I and another buddy re-soldered every joint and it worked great for the original owner after that.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 16, 2016 at 1:51 PM, Frank Knobbe via aprssig <span dir="ltr"><<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Wed, 2016-03-16 at 12:59 -0500, Al Wolfe via aprssig wrote:<br>
> Richard et al,<br>
> This one is on 144.39 so had hoped to use it for APRS. Service monitor<br>
> says transmit power is nearly 5 watts, but on receive it takes a couple of<br>
> microvolts to see anything out of the noise. Maybe I'm expecting too much.<br>
<br>
<br>
I have a 8621A. When I first received it, it was near deaf. Or totally<br>
deaf, don't remember. I had sent it back to MFJ (lazy, no time, was<br>
brand new and I expected more) and it arrived back on my door step in<br>
the same deaf condition. So I took a look at it myself.<br>
<br>
Basically, the solder job was crap. I resoldered everything. What fixed<br>
the problem was the solder joints on the crystal itself. Since the<br>
ground is on large area of copper, that solder joint just needed some<br>
extra TLC. Once it was soldered properly, the radio worked like a charm.<br>
<br>
Take a look at your solder joint, especially in areas where cold joints<br>
can happen easily. Check the joints of the crystal. (I still recommend<br>
spending a bit extra time to resolder every joint).<br>
<br>
Hope that helps,<br>
Frank<br>
<br>
<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature">Curt, WE7U<br><a href="http://wetnet.net/~we7u" target="_blank">http://wetnet.net/~we7u</a><br><a href="http://www.sarguydigital.com" target="_blank">http://www.sarguydigital.com</a></div>
</div>