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69914Re: Ensemble rxtx troubles

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  • kk4dcf
    Nov 10, 2012
    • 0 Attachment
      Rewound T2. No change in apparent tx power

      R48 - 34.6mV
      R49 - 31.5mV

      --- In softrock40@yahoogroups.com, "kk4dcf" <oohay@...> wrote:
      >
      > Rewound T4 and my voltages across R48 and R49 are at least close to each other now.
      >
      > R48 - 32mV
      > R49 - 29mV
      >
      > The ATU now at least indicates that something is happening when I attempt to transmit. The red led stays solid while transmitting. I was able to get it to tune once on 40m but haven't been able to get it to tune again. If I try to tune at the top of the 20m band, I don't get any solid red led or anything. The atu just powers down after 3 seconds.
      >
      > I'll keep working backwards through the schematic and rewind T3 and then T2 if it still wont tune. I'm using the tuner to gauge transmit power since I have no other means to measure it right now.
      >
      > As a side note, my receive performance seems to have improved after redoing T4. I can't quantify that and it may just be more activity over the weekend or wishful thinking.
      >
      > James.
      >
      > --- In softrock40@yahoogroups.com, "kk4dcf" <oohay@> wrote:
      > >
      > > My R48 and R49 voltages are off again. I thought I had fixed this while building it by replacing Q8 but the problem is back.
      > >
      > > R48 - 50mV
      > > R49 - 98mV
      > >
      > > I did a lot of searching and reading on this forum last time which led me to replacing Q8. I had also removed R48 and R49 to measure their resistance and they checked out fine. Does anyone have any suggestions for something else to test?
      > >
      > > James.
      > >
      > > --- In softrock40@yahoogroups.com, "kk4dcf" <oohay@> wrote:
      > > >
      > > > I'm not really concerned about which software I use. That's the easy part for me.
      > > >
      > > > I'm going to go back through the build instructions and retest all the points from there. I'll probably pull all the transformers off and rewind them. All I can do at this point is take shots in the dark.
      > > >
      > > > James.
      > > >
      > > > --- In softrock40@yahoogroups.com, John Greusel <greusel@> wrote:
      > > > >
      > > > > James,
      > > > >
      > > > > You probably have a cold solder joint that's essentially giving you the effect of mono input.
      > > > > QTradio is not really ready for primetime so if you want to persist with that as a means of troubleshooting your transmit functions you're have to join that yahoo group and ask a lot of questions.
      > > > > HDSDR and PowerSDR both do transmit fine although PowerSDR had much more control over all the possible functions at this point. If you're satisfied with your receiver I would attach a dummy load, learn how to construct a diode based power meter and take some power measurements on your output.
      > > > >
      > > > > John
      > > > > KC9OJV
      > > > >
      > > > >  
      > > > >
      > > > >
      > > > >
      > > > > ________________________________
      > > > > From: kk4dcf <oohay@>
      > > > > To: softrock40@yahoogroups.com
      > > > > Sent: Friday, November 9, 2012 3:59 PM
      > > > > Subject: [softrock40] Re: Ensemble rxtx troubles
      > > > >
      > > > >
      > > > >  
      > > > > Pretty sure it's not a mono input issue. Sometimes when I pick it up and fiddle with the board it'll start doing this. I picked it up and fiddled with it again and the mirroring is gone.
      > > > >
      > > > > I've got ghpsdr3 running. Seems like it can only handle a single connection at a time. The second person that connects will get very choppy audio. The radio is running off some unprotected lipo batteries so I can't leave this running for very long. Can't walk away from it for long at least. If anyone wants to take a look it should be in the shared list, KK4DCF.
      > > > >
      > > > > Using ghpsdr3 with all output maxed out in pulseaudio, I still can't trigger the tuner.
      > > > >
      > > > > James.
      > > > >
      > > > > --- In softrock40@yahoogroups.com, John Greusel <greusel@> wrote:
      > > > > >
      > > > > > James,
      > > > > > Mirroring is caused by feeding the Line In to a mono jack or a problem on the board.
      > > > > > You're jumping in with both feet trying to master several things at once.
      > > > > > That's a quick way to learn but also a quick way to get slapped around with SDR trouble areas.
      > > > > > I would sort our the mirror problems with HDSDR and then proceed to the next problem.
      > > > > > The tuner was not curing your mirroring.
      > > > > >
      > > > > > John
      > > > > > KC9OJV
      > > > > >
      > > > > >  
      > > > > >
      > > > > >
      > > > > >
      > > > > > ________________________________
      > > > > > From: kk4dcf <oohay@>
      > > > > > To: softrock40@yahoogroups.com
      > > > > > Sent: Friday, November 9, 2012 2:11 PM
      > > > > > Subject: [softrock40] Re: Ensemble rxtx troubles
      > > > > >
      > > > > >
      > > > > >  
      > > > > > I pulled the atu and my mirroring problem started up again.
      > > > > >
      > > > > > I'm fairly certain I found every conceivable place to increase the audio output levels from the computer. I've tried using powersdr, hdsdr tx via ssb and ghpsdr3. None of them are able to to transmit anything that the ATU will respond to. Wont tune. Wont give me power level indication. The T1 will poweroff after 3 seconds if it doesn't detect any transmission and that's what it's doing.
      > > > > >
      > > > > > I'm trying to get ghpsdr3 working well enough to make it available to anyone willing to take a look.
      > > > > >
      > > > > > James.
      > > > > >
      > > > > > --- In softrock40@yahoogroups.com, "Alan" <alan4alan@> wrote:
      > > > > > >
      > > > > > > James,
      > > > > > >
      > > > > > > As John says, try RX without the ATU, are you on the right sideband?
      > > > > > > What bands are you using?
      > > > > > > But a good antenna and an open band is needed.
      > > > > > > Make sure RX is good first.
      > > > > > >
      > > > > > > For TX is your mixer set correctly to max?
      > > > > > > PSDR does not necessarily give full power unless setup properly. I forget exactly, read the manual.
      > > > > > > Or use Rocky or HDSDR, much simpler for initial setup.
      > > > > > > You do need something to judge your power. A diode across 50 ohms is better than nothing.
      > > > > > >
      > > > > > > 73 Alan G4ZFQ
      > > > > > >
      > > > > > > ----- Original Message ----- >
      > > > > > > > First, I can't seem to transmit enough power to tune an elecraft T1. It requires a minimum 0.5w to tune. I've used powersdr and
      > > > > > > > pushed the tune drive to max and left it running for 5+ minutes and the heatsink on the FETs barely warms up. I don't have any way
      > > > > > > > to measure output power right now.
      > > > > > > >
      > > > > > > > Second, the radio seems rather deaf. I can pickup some ssb here and there but they're few and far between and are usually too
      > > > > > > > distorted to understand. It's most likely a result of my crappy attic dipole but I wanted to put this out there as well in case
      > > > > > > > someone has a suggestion.
      > > > > > > >
      > > > > > > > I have no equipment other then a cheap multimeter to try and figure this out. Any thoughts where I should start?
      > > > > > > >
      > > > > > >
      > > > > >
      > > > >
      > > >
      > >
      >
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