[1000mp] AFSK/SSB Power Drop
Thomas Giella KN4LF
kn4lf at tampabay.rr.com
Sat Aug 28 12:27:30 EDT 2004
Hi Chris,
Glad to see that you solved your problem. Yes the cables between rig and computer are the weak point in the system. I've had similar things happen here too, mainly my cats jiggling the wires!
73,
Thomas F. Giella, KN4LF
Plant City, FL, USA
Grid Square EL87WX
Lat & Long 27 58 31 44N 82 09 51 98W
kn4lf at arrl.net
Propagation eGroup: http://lists.contesting.com/mailman/listinfo/propagation
KN4LF Solar Space Weather & Geomagnetic Data Archive: http://www.kn4lf.com/kn4lf5.htm
KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
----- Original Message -----
From: Chris Brougham
To: All about Yaesu 1000mp
Sent: Wednesday, August 25, 2004 12:38 AM
Subject: Re: [1000mp] AFSK/SSB Power Drop
Hi Thomas,
Again thanks for your help. There is, I think, a happy ending here! I
did a hard reset but it didn't seem to do the trick. While finishing off
the third leg of SARTG I happened to bump my laptop and noticed that the
power output dropped again. What I determined is that the AFSK issue was
due to a falty aidio out cable between my laptop and rig. When I jiggled
it I could replicate the behaviour. I replaced the cable and haven't
noticed and issues with the rig! So problem number one is fixed I think.
With respect to phone, I'm still testing, but I am also seriously
wondering if there isn't an issue with the MH-31. Perhaps there was a
loose connection? It's so strange that both occurences happened
simultaneously it would lead to one to assume it was someting in the rig
... Murphy's Law I guess!! Anyway, I haven't noticed the issue for a
couple of days.
Thomas Giella KN4LF wrote:
>Hi Chris,
> Have you done a hard reset of the microprocessor? This may or may not help you with the problem. Often times strange little bugaboos with the Mark V can be fixed that way.
> I was running into strange things when I first bought my Mark V Field. I would lose output power too and also receive audio and I could not scroll through the memories. What finally occurred to me is that the Mark V is a computer with a radio built in and my problems were occurring after power surges and brownouts.
> I wrote down all of my menu settings, saved my memories to the MPMem software written by K6SE, did the hard microprocessor reset and all was well. I then purchased a third APC UPS model 350 and placed my V Field on it to protect the rig from the power vagaries and have had no more bugaboos. An added bonus is that the UPS will allow me to use my rig for low power QRP and CW work during emergencies when power fails.
>
>73,
>Thomas F. Giella, KN4LF
>Plant City, FL, USA
>Grid Square EL87WX
>Lat & Long 27 58 31 44N 82 09 51 98W
>kn4lf at arrl.net
>
>KN4LF Solar Space Weather & Geomagnetic Data Archive: http://www.kn4lf.com/kn4lf5.htm
>KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
> ----- Original Message -----
> From: Chris Brougham
> To: All about Yaesu 1000mp
> Sent: Saturday, August 21, 2004 8:18 PM
> Subject: Re: [1000mp] AFSK/SSB Power Drop
>
>
> Hi Thomas,
>
> Thanks for the tips. The display lights don't flicker, and the rig isn't
> resetting itself. There is just 0 power output on SSB, but the rig keys.
> When I switch to CW and send a dit then all is well. I found out also
> today that it doesn't matter what antenna I'm using. The rig exhibits
> this same behaviour in this totally random fashion no matter what
> antenna is attached.
>
> My antenna tuner does have a balun. The balanced line from the wire loop
> goes into it and the output is coax to the rig. I took the antenna tuner
> offline and fed the mag loop directly to the rig (I have two loops one
> is a wire loop and one is a mag loop fed by coax). Same thing. It goes
> great for qso after qso, and then decides to quit! Switch to CW send a
> dit, then it works again.
>
> It's so weird. I had just finished a SARTG contact and decided to go out
> for a bit. Turned the rig off and when I came back 20 minutes later and
> turned the rig on it wouldn't transmit. But I had just finished
> transmitting before I turned the thing off! So I send a dit and then all
> is well.
>
> I'm so confused :-).
>
> Thomas Giella KN4LF wrote:
>
> >When you get the transmit power output drop does your digital readout dim and/or flicker? If so you are getting RF feedback from your nearby indoor loop.
> >
> >Add 1/4 wave radials for all bands you operate on to the back of your tuner and see if that helps. Also does your external tuner have a built in 4:1 BALUN? If so are you using it? By using it you "may" be able to reduce the RFI problem, by forcing current in both sides of your feedline to be "more" balanced. Of course though on certain bands at certain powers the BALUN "could" saturate and create problems.
> >
> >If it is an RFI problem it Can cause your Mark V to do a hard reset and you will lose all menu settings, auto tuner and memory data.
> >
> >73,
> >Thomas F. Giella, KN4LF
> >Plant City, FL, USA
> >Grid Square EL87WX
> >Lat & Long 27 58 31 44N 82 09 51 98W
> >kn4lf at arrl.net
> >
> >KN4LF Solar Space Weather & Geomagnetic Data Archive: http://www.kn4lf.com/kn4lf5.htm
> >KN4LF Amateur & SWL Radio History: http://www.kn4lf.com
> > ----- Original Message -----
> > From: Chris Brougham
> > To: All about Yaesu 1000mp
> > Sent: Saturday, August 21, 2004 3:51 AM
> > Subject: [1000mp] AFSK/SSB Power Drop
> >
> >
> > Hi Folks,
> >
> > I've been noticing a strange problem with my Mark V. Every now and then
> > I will get power drops when using afsk RTTY or phone. The SWR is always
> > flat so I don't think it's that (I use an external tuner). I never see
> > the problem with CW. When the power drops out I often have to power cyle
> > the rig to get it working again ... but not always.
> >
> > I have a couple of different types of antennas at this QTH (an
> > apartment). One is a large indoor wire loop fed with 450 ohm ladder
> > line. The others are a mag loop, fed with coax, and one is a hamstick
> > mounted on my balcony.
> >
> > I've never seen the issue with the hamstick, but it occurs most
> > frequently with the indoor wire loop. I noticed it on 40M phone during
> > Field Day with the wire loop for the first time. Yesterday I noticed it
> > on 15M phone (running 20 Watts). Today during the SARTG RTTY contest it
> > occured for the first time with the mag loop running 75 watts (all the
> > other occasions were with the indoor wire loop).
> >
> > My friend suggested some sort of RF problem in the shack. Why would it
> > occur only on phone and AFSK and not CW? It seems to be intermittent too.
> >
> > Any ideas would be really appreciated!
> >
> > --
> > Chris VA7CAB
> >
> >
> >
> > _______________________________________________
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> >
> >
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> --
> Chris VA7CAB
>
>
>
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--
Chris VA7CAB
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