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<div class="moz-cite-prefix">Brian:<br>
<br>
Signals won't go backwards through the Pennywhistle amplifier.<br>
<br>
You need an antenna relay to route around the amplifier when <br>
you are in receive, and also a low pass filter for the
Pennywhistle amplifier<br>
when you are in transmit.<br>
<br>
--- Graham / KE9H<br>
<br>
==<br>
<br>
On 1/27/2013 9:23 PM, K1TCP Grigsby wrote:<br>
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<div dir="ltr">I just completed my Penny Whistle build. Everything
seemed to go together well. I ran the couple of tests in the
manual, using the antenna tuner, since I had one, and then
setting the trim pots.
<div><br>
</div>
<div>Antenna VSWR looked good across all bands, about 1.1 - 1.3.<br>
<div><br>
</div>
<div>I wasn't pulling 20mA before adjusting the trim pots,
more like 8mA. I didn't think it was a huge deal, I could be
wrong? I adjusted the trimpots accordingly, bumping both up
about 460mA. Voltage looked good, about 13volts. </div>
</div>
<div><br>
</div>
<div style="">I can hit the bias control, and the current pull
reads about 980mA, which is to be expected I'd think. When I
transmist through it with the transceiver, it peaks to about
2.20 amps sometimes, once it warms up some.</div>
<div style=""><br>
</div>
<div style="">I know I am getting out on the TX. I can hear
myself on another rig on 40 meters running PSK. I assume it's
RF from one antenna to another. But I don't hear anything. I
thought it was just seriously attenuating the incoming RF, but
I unplugged the coax from the output BNC, and the waterfall
never changes. Just weak reception. If I plug the antenna coax
back into the transceiver, the waterfall springs to life. I've
tried swapping coax cables. I ran some continuity tests, and I
get tone from BNC center on BNC input and output connector.
But I also get tone from BNC center to BNC outer, which seemed
odd, but some of the transformers seem make these connections?</div>
<div style=""><br>
</div>
<div style="">Still searching for ideas, thought I would bounce
it off the group. </div>
<div style=""><br>
</div>
<div style="">Running an Ensemble RXTX, 20/30/40.</div>
<div style=""><br>
</div>
<div style="">Thanks, </div>
<div style="">Bryan</div>
<div style="">K1TCP</div>
</div>
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