[1000mp] Different SWR at SSB and CW
Steve
steve.w3sy at erols.com
Tue Jun 8 20:03:15 EDT 2004
Hey Art,
I think I see the problem. The Tuneup Word International Team (TWIT) does
not recognize "AaaaaOOOOO" as a legitimate Tuneup Word. If the operator
attempts to tune up or test with "AaaaaOOOOO," results may be inconsistent.
The Team suggests that SSB ops try one of the following Tuneup Words
instead:
1) Oooooooohhhla, OOOOOOOooooooOOOOOOOoooooohhhla!
2) Aaaaaaauuudio.... AAAAAAAAUUUUUUdio.....
3) MMMMMbreeeeeaaaak mmmmmmmbreeeeeaaaaak broke....
4) Cambio! Cambio! Flacko! Flacko!
5) Helloooooooooooooooooooooooooooo radio!
7) Wheeeeeeeeeeeee.... wheeeeeeeee... <whistles>
7) Any lengthy combination of the above.
For best results, use a busy frequency, or get within 1 kc of one.
FYI, The Team is also trying to standardize CW Test Words. So far, "NST"
seems to have found the most favor.
Good day to YOU sir!
73 de Steve W3SY
dit dit
:-D
--------------------------------------------
----- Original Message -----
From: "Art Searle, W2NRA" <w2nra at birdsandbeacons.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Tuesday, June 08, 2004 2:15 PM
Subject: Re: [1000mp] Different SWR at SSB and CW
> Let me get this straight. This group is having a serious discussion about
> reading SWR in SSB by shouting "AaaaaOOOOO" into a microphone? And
> wondering why SSB SWR is different than CW SWR? And because of this
> something is supposed to be wrong with the rig? My question is why has
this
> discussion gone this far?
>
> And as a group we are encouraging the operating practice of shouting
> "AaaaaOOOOO" into a microphone on the air? Yes, Sergey said he did his
test
> into a dummy load. Do you have any doubt that he does it on the air too?
> Now I remember why I don't work this mode anymore.
>
> 73,
>
> Art
> W2NRA
> ----- Original Message -----
> From: "Sergey" <a1sy at yahoo.com>
> To: "Art Searle W2NRA" <w2nra at birdsandbeacons.com>; "All about Yaesu
1000mp"
> <1000mp at mailman.qth.net>
> Sent: Tuesday, June 08, 2004 1:03 AM
> Subject: Re: [1000mp] Different SWR at SSB and CW
>
>
> > Hi Art
> > Well it's not a silly question.
> > I have a Heil Pro-set plus and checking my SSB by loud "AaaaaOOOOO" and
so
> on...
> > 73,Sergey
> > KO5D
> >
> > --- Art Searle W2NRA <w2nra at birdsandbeacons.com> wrote:
> > > Please excuse the silly question, I don't operate
> > > the mode. How does one check SWR in SSB? Whistle
> > > into the mic?
> > >
> > > 73,
> > > Art
> > > W2NRA
> > > ----- Original Message -----
> > > From: "Sergey" <a1sy at yahoo.com>
> > > To: "All about Yaesu 1000mp"
> > > <1000mp at mailman.qth.net>
> > > Sent: Monday, June 07, 2004 8:05 PM
> > > Subject: Re: [1000mp] Different SWR at SSB and CW
> > >
> > >
> > > > Mike
> > > > In experiment I did yesterday I connect my TRCVR
> > > to the dummy load.
> > > > I measure my SWR with TRCVR meter and in the
> > > output of TRCVR I have a Daiwa SWR meter.
> > > > Daiwa was connected to the 50 Ohm 200 Watts
> > > dummy load.
> > > > I undestand that some people saing go ahead and
> > > just enjoy to be in the air.
> > > > I think I have some problem with My SWR reading.
> > > > The facts:
> > > > 1.Doesn't metter if Tuner is ON or OFF - results
> > > are the same.SSB SWR higher than CW for 0.5-0.7.
> > > > 2.Test done on 50 Ohm dummy load,so I exclude
> > > any influance of antenna.
> > > > 3.I think it doesn't make sence to have
> > > different SWR on the same Frequency.
> > > >
> > > > So,I seriously thinking to send it to Yaesu.
> > > > I don't think it a good idea to work on SSB and
> > > to see SWR around 2 and to verify every time that
> > > > "I still have an antenna" by swithching to CW.
> > > > I wrote this message to the forum to ask if
> > > anybody else had the same issue and what was the
> > > > solution.And bisides I wanted to hear more
> > > opinions on that issue from others.
> > > > Thanks,Sergey
> > > > KO5D
> > > > --- Mike Schatzberg
> > > <cherokeehillfarm at earthlink.net> wrote:
> > > > > Hello Sergey:
> > > > >
> > > > > Okay, interesting data. So, what is the SWR
> > > at the coax connector that is
> > > > > plugged into the SO 259 on the back of the
> > > Mark V?
> > > > >
> > > > > Are you measuring the SWR externally after a
> > > linear amplifier?
> > > > >
> > > > > If you are feeding your amplifier from your
> > > Mark V, you should have a very
> > > > > low SWR at the input to the amplifier. In
> > > fact, you should not need to even
> > > > > use the tuner at all, in this case. An
> > > interconnecting cable between the
> > > > > two units may be a problem.
> > > > >
> > > > > Reset your memories one more time, and use the
> > > CW method to force the tuner
> > > > > to achieve as close to 1:1 as possible.
> > > > >
> > > > > Clearly your Mark V thinks the SWR is high on
> > > SSB, and is reducing the power
> > > > > output accordingly, but will not reduce it on
> > > CW at all, when the match is
> > > > > 1:1.2 or less....
> > > > >
> > > > > If one more forced tuning does not solve the
> > > problem, lower the overall SWR
> > > > > of the antenna system as much as possible. Go
> > > to 15 meters, and measure the
> > > > > SWR of your antenna system, at the desired
> > > frequency, and then carefully
> > > > > start pruning back the coax, perhaps 6 inches
> > > at a time, and re-evaluate the
> > > > > SWR. While pruning, you can hold the coax
> > > braid to the SO 259 connector
> > > > > with a clothespin, to make contact.
> > > > >
> > > > > Reducing the overall SWR, prior to making the
> > > tuner tune the system, should
> > > > > help the overall situation.
> > > > >
> > > > > Finally, prior to doing any of this, check all
> > > your jumper cables, and even
> > > > > your antenna cable, into a dummy load, and
> > > make sure they all read as close
> > > > > to 1:1 as possible. You may have a bad cable
> > > in your antenna system causing
> > > > > you problems. A dummy load is a good
> > > investment for trouble shooting, and
> > > > > the Mark V should show 200 watts on all bands,
> > > CW and SSB into the dummy
> > > > > load with a good piece of coax, or a double
> > > male connector.
> > > > >
> > > > > When you are sure that the rig is working into
> > > the dummy load, begin the
> > > > > pruning operation.
> > > > >
> > > > > Good luck and happy DXing,
> > > > >
> > > > > Mike
> > > > > WB2AJI
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Sergey" <a1sy at yahoo.com>
> > > > > To: "All about Yaesu 1000mp"
> > > <1000mp at mailman.qth.net>
> > > > > Sent: Sunday, June 06, 2004 11:38 PM
> > > > > Subject: Re: [1000mp] Different SWR at SSB and
> > > CW
> > > > >
> > > > >
> > > > > > Thanks Mike
> > > > > > Here is another test i run today:
> > > > > > Freq Mode Internal SWR Extenal SWR
> > > Internal P meter External P
> > > > > meter(PEP)
> > > > > > 7100 CW 1 1.1
> > > 200 200
> > > > > > 7100 SSB 1.7 1
> > > 200 100
> > > > > > 14160 CW 1.2 1.2
> > > 200 200
> > > > > > 14160 SSB 1.6 1.1
> > > 200 120
> > > > > > 21207 CW 1.3 1.2
> > > 200 160
> > > > > > 21207 SSB 1.7 1
> > > 200 85
> > > > > >
> > > > > > It looks like a Power has a different
> > > reading as well.Not sure TRCVR read
> > > > > PEP or AVG.In AVG it
> > > > > > would read actually less.
> > > > > > I made this test on 50 Ohm load and confused
> > > with results.
> > > > > > Not sure it's normal.I talked to my friend
> > > that has a 1000MP Field and he
> > > > > has a difference in
> > > > > > about 0.1 between SWR and CW.
> > > > > > Even that's OK,it's a little bit bother me
> > > when I use SSB.Not sure I saw
> > > > > it before.
> > > > > > Thanks,Sergey
> > > > > > KO5D
> > > > > >
> > > > > > --- Mike Schatzberg
> > > <cherokeehillfarm at earthlink.net> wrote:
> > > > > > > Hello Sergey:
> > > > > > >
> > > > > > > I do not pay any attention to the SSB SWR
> > > really. When I find the
> > > > > frequency
> > > > > > > I wish to adjust the tuner on, I do it in
> > > CW mode. I like to send a
> > > > > series
> > > > > > > of DITS at about 30 wpm, and then push and
> > > hold the tuner button, to
> > > > > force
> > > > > > > the tuner to retune, and to memorize the
> > > setting. This can be done at
> > > > > > > relatively lower power, say about 30
> > > watts.
> > > > > > >
> > > > > > > I find that even with s 1:1 SWR in CW
> > > mode, the SWR meter while in SSB
> > > > > still
> > > > > > > reads upscale somewhat, for whatever
> > > reason. The SWR reading in CW
> > > > > agrees
> > > > > > > with my Autek Research WM-1, and therefore
> > > appears to be accurate.
> > > > > > >
> > > > > > > I just ignore the SSB reading. Of course,
> > > if your Mark V decreases your
> > > > > > > power output, after getting a perfect
> > > match in CW, while transmitting on
> > > > > > > SSB, you would have another issue. But I
> > > never have seen this situation
> > > > > > > occur, the radio always transmits with
> > > full power capability after
> > > > > adjusting
> > > > > > > the tuner in this manner.
> > > > > > >
> > > > > > > Good luck and happy DXing,
> > > > > > >
> > > > > > > Mike
> > > > > > > WB2AJI
> > > > > > > ----- Original Message -----
> > > > > > > From: <Sergey_Abrikosov at amat.com>
> > > > > > > To: <1000mp at mailman.qth.net>
> > > > > > > Sent: Sunday, June 06, 2004 5:38 PM
> > > > > > > Subject: [1000mp] Different SWR at SSB and
> > > CW
> > > > > > >
> > > > > > >
> > > > > > > > Last week I found a higher than usual
> > > SWR on 14MHZ during some
> > > > > pile-up.
> > > > > > > > The SWR was around 1.6 with some peaks
> > > to 1.8.
> > > > > > > > I use a dipole and thought that
> > > something happened to my antena,but
> > > > > after
> > > > > > > > several experiments I found that I have
> > > 1.2 SWR on the same frequency
> > > > > in
> > > > > > > CW
> > > > > > > > mode.
> > > > > > > > So,I tried 7,14,28 MHZ and had the same
> > > issue: 1.1.-1.2 on CW and
> > > > > 1.6-1.7
> > > > > > > > on SSB on the same frequency.
> > > > > > > > I tried to retune again my tuner but no
> > > change in SWR so far.
> > > > > > > > I did reset all memories and it didn't
> > > help either.
> > > > > > > > Did anybody had the same issue?
> > > > > > > > Thanks,Sergey
> > > > > > > > KO5D
> > > > > > > >
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