[hpsdr] No RF coming in through Penny Whistle

[K1TCP]

Thanks!

-Bryan
K1TCP



On Jan 27, 2013, at 11:14 PM, Graham / KE9H <KE9H at austin.rr.com> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> Brian:
> 
> Signals won't go backwards through the Pennywhistle amplifier.
> 
> You need an antenna relay to route around the amplifier when 
> you are in receive, and also a low pass filter for the Pennywhistle amplifier
> when you are in transmit.
> 
> --- Graham / KE9H
> 
> ==
> 
> On 1/27/2013 9:23 PM, K1TCP Grigsby wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>> 
>> 
>> 
>> 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. 
>> 
>> Antenna VSWR looked good across all bands, about 1.1 - 1.3.
>> 
>> 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. 
>> 
>> 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.
>> 
>> 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?
>> 
>> Still searching for ideas, thought I would bounce it off the group. 
>> 
>> Running an Ensemble RXTX, 20/30/40.
>> 
>> Thanks, 
>> Bryan
>> K1TCP
>> 
>> 
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