P3 deaf ??
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Hi all,
Used the P3 for the first time last weekend during the BARTG RTTY contest. I did notice that all signal levels shown by the P3 were very low, for instance with a noise level of around s3 on the K3 and a RTTY signal in the clear at S5-6 there was no trace on the P3 on either the waterfall or scope. Signals that are peaking S9 +20 on the radio with no preamp are around –91dbm (S6) on the P3. I’ve checked cables etc and K3 had the IF output mod done. Any ideas as I see people saying you can see signals on the waterfall sometimes before you can hear them, not so the case here. Thanks Jim ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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OK update,
Now tried the P3 on a second K3 which has the IF output mod done and I'm getting the same effect, it needs a good strong signal before any trace of a signal on the P3 S9+20 signals are shown at about S6 Anything below about S6 is not visible on the P3. Any ideas before the seller has it back! Jim M0CKE -----Original Message----- From: Jim Balls Sent: Friday, January 28, 2011 4:33 AM To: [hidden email] Subject: [Elecraft] P3 deaf ?? Hi all, Used the P3 for the first time last weekend during the BARTG RTTY contest. I did notice that all signal levels shown by the P3 were very low, for instance with a noise level of around s3 on the K3 and a RTTY signal in the clear at S5-6 there was no trace on the P3 on either the waterfall or scope. Signals that are peaking S9 +20 on the radio with no preamp are around –91dbm (S6) on the P3. I’ve checked cables etc and K3 had the IF output mod done. Any ideas as I see people saying you can see signals on the waterfall sometimes before you can hear them, not so the case here. Thanks Jim ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Try a different BNC-BNC cable?
matt W6NIA On Fri, 28 Jan 2011 18:58:18 +0000, you wrote: >OK update, > >Now tried the P3 on a second K3 which has the IF output mod done and I'm >getting the same effect, it needs a good strong signal before any trace of a >signal on the P3 > >S9+20 signals are shown at about S6 > >Anything below about S6 is not visible on the P3. > >Any ideas before the seller has it back! > >Jim M0CKE > >-----Original Message----- >From: Jim Balls >Sent: Friday, January 28, 2011 4:33 AM >To: [hidden email] >Subject: [Elecraft] P3 deaf ?? > >Hi all, > >Used the P3 for the first time last weekend during the BARTG RTTY contest. > >I did notice that all signal levels shown by the P3 were very low, for >instance with a noise level of around s3 on the K3 and a RTTY signal in the >clear at S5-6 there was no trace on the P3 on either the waterfall or scope. >Signals that are peaking S9 +20 on the radio with no preamp are >around 91dbm (S6) on the P3. > >Ive checked cables etc and K3 had the IF output mod done. > >Any ideas as I see people saying you can see signals on the waterfall >sometimes before you can hear them, not so the case here. > >Thanks > >Jim >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by James Balls
Check that you haven't made the same mistake that I made when I first connected up the P3.
Putting the BNC cable from the K3 into the top BNC socket (labelled "IF Out") will give you the very low levels you are seeing on the waterfall. Crosstalk or breakthrough? Check that it is in the lower socket which is appropriately labelled "IF In". Just a thought. 73 Norman - GM4KGK |
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In reply to this post by James Balls
update.
thanks to all for replies, matt hit the spot, it was the bnc to bnc that was faulty, p3 now performing great :) Sent from Samsung Mobile Matt Zilmer <[hidden email]> wrote: >Try a different BNC-BNC cable? > >matt W6NIA > >On Fri, 28 Jan 2011 18:58:18 +0000, you wrote: > >>OK update, >> >>Now tried the P3 on a second K3 which has the IF output mod done and I'm >>getting the same effect, it needs a good strong signal before any trace of a >>signal on the P3 >> >>S9+20 signals are shown at about S6 >> >>Anything below about S6 is not visible on the P3. >> >>Any ideas before the seller has it back! >> >>Jim M0CKE >> >>-----Original Message----- >>From: Jim Balls >>Sent: Friday, January 28, 2011 4:33 AM >>To: [hidden email] >>Subject: [Elecraft] P3 deaf ?? >> >>Hi all, >> >>Used the P3 for the first time last weekend during the BARTG RTTY contest. >> >>I did notice that all signal levels shown by the P3 were very low, for >>instance with a noise level of around s3 on the K3 and a RTTY signal in the >>clear at S5-6 there was no trace on the P3 on either the waterfall or scope. >>Signals that are peaking S9 +20 on the radio with no preamp are >>around 91dbm (S6) on the P3. >> >>Ive checked cables etc and K3 had the IF output mod done. >> >>Any ideas as I see people saying you can see signals on the waterfall >>sometimes before you can hear them, not so the case here. >> >>Thanks >> >>Jim >>______________________________________________________________ >>Elecraft mailing list >>Home: http://mailman.qth.net/mailman/listinfo/elecraft >>Help: http://mailman.qth.net/mmfaq.htm >>Post: mailto:[hidden email] >> >>This list hosted by: http://www.qsl.net >>Please help support this email list: http://www.qsl.net/donate.html >> >>______________________________________________________________ >>Elecraft mailing list >>Home: http://mailman.qth.net/mailman/listinfo/elecraft >>Help: http://mailman.qth.net/mmfaq.htm >>Post: mailto:[hidden email] >> >>This list hosted by: http://www.qsl.net >>Please help support this email list: http://www.qsl.net/donate.html > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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