<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Oops -- got careless. The antenna was connected to Mercury. Penelope was connected to a dummy load directly at the board. Re-trying the experiment with Penny connected to the external antenna connector and a terminator on Mercury... <div><br></div><div>Same results. Antenna doesn't seem to be radiating the spurs.<div><div><div><br></div><div>Steve, K9SRB</div><div><br><div><div>On Sep 10, 2011, at 8:15 AM, Steve Bunch wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I can also confirm this. I connected Penny to an external antenna, and listened on a TS-790A connected to an external 2M halo, and an ICOM R-7000 connected to a vertical antenna, and received a faint signal on both. I unplugged the antenna from Penny, and there was no perceptible change in the signal. I turned off power, and the signal disappeared. There does not appear to be significant signal making it out through the antenna, but rather it's being directly radiated from the boards/wires.<div><br></div><div>My Atlas and boards are in a rack-mount metal box, with audio, and Ethernet cables passing through holes. Penny is connected by a short coax jumper to a BNC bulkhead thru-connector for the antenna. The power cable inside the box is looped through a ferrite toroid and to a bulkhead unfiltered connector. I'm looking for some ferrite filters to apply to the other wires to see if it makes a difference. Interestingly enough, the signal doesn't even quite disappear if I turn the antenna selector switch on the 2M antenna to the TS-790A into a dead short (about 1M of cable from transceiver to antenna switch), though it's very weak. Powerline-conducted, or radiated directly? The two are about 10' apart, plugged into different outlets.<div><br></div><div>I tuned to 141.2624, 144.3346, and 147.4066 on the R-7000, and with a 50 ohm terminator on Penny's antenna lead, there was definitely a solid signal at all three frequencies. The 147.4066 was the strongest. When power is turned off, they disappear.</div><div><div><br></div><div>Steve, K9SRB</div><div><br><div><div>On Sep 10, 2011, at 4:17 AM, roland etienne wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">***** High Performance Software Defined Radio Discussion List *****<br><br>
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<div class="Section1"><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Hi,<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">I can confirm hearing a spur on 144.384
Mhz on my IC706MK2G, coming from the HPSDR TRX, I think Steve is rigth, 47 *
3.072 ?<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy">Roland, F8CHK<o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"><o:p> </o:p></span></font></p><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size:
10.0pt;font-family:Arial;color:navy"> <o:p></o:p></span></font></p><p class="MsoNormal"><font size="2" face="Arial"><span style="font-size:10.0pt;
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