My last test was:
Using a 9 V battery;
Taking read-outs on FM;
In to a dummy load;
Results stay the same. The dummy load should give a swr of 1.1/1, but
it's not. The forward power reading is nearly there. If I put the dummy
load straight in to the radio, the tuner tunes, and even with the tuner
switched off, swr reads 1.1/1. All is fine with the dummy load it seems.
We had the fly lead, between the radio and watt meter, checked with a
multimeter.
I'm now clueless.
Kallie Swanepoel
Piano Tuner/Klavierstemmer
Skype Name:
KallieSwanepoel
Phone: +27 (0) 12 379 3762
Mobile: +27 (0) 83 261 6942
Voice Link: +27 (0) 88 129 8775
Fax: +27 (0) 86 633 2999
http://www.kallieswanepoel.co.za
-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Colin McDonald
Sent: 14 November 2006 18:00
To: [log in to unmask]
Subject: Re: TW1 Inconsistancy
Hi Kallie:
If you take power readings on A M you will get slight differences
between dead key output and P E P output when you speak or whistle into
the mike. On FM, the over all power output should stay the same
regardless of audio being put on the carrier. I would suspect that if
you are getting large differences in power output and or SWR on the same
frequency at different times, that it is an antenna problem or a feed
line problem. This can be caused by rain, or water inside antenna
connections or a feed line that is not consistently supplying 50 ohms to
the transceiver. If you are using twin lead or latter line, then
problems with spacing or shorting could be at fault.
Perhaps this is a very silly question, but you aren't trying to use the
tw1 on frequencies above 54MHZ right? If you are, then yes, power and
swr readings will be very eratic indeed. Which bands are you checking on
using FM or A M? are there HF frequencies below 50MHZ that have FM
portions such as the north american 10 meter band above 29MHZ?
Also, as has been already mentioned, sometimes having the tuner inline
or out of line will cause different power readings, sometimes as much as
10 or 15 watts difference. This will not effect swr though. Since the
tuner is tuning internally, the swr meter will not detect internal tuner
adjustments. 73 Colin, V A6BKX
----- Original Message -----
From: "Kallie Swanepoel" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 14, 2006 8:01 AM
Subject: Re: TW1 Inconsistancy
> Hi Steve
>
> Thanks - I'm transmitting on FM or AM.
>
> Kallie Swanepoel
>
> Piano Tuner/Klavierstemmer
>
> Skype Name:
> KallieSwanepoel
>
> Phone: +27 (0) 12 379 3762
> Mobile: +27 (0) 83 261 6942
> Voice Link: +27 (0) 88 129 8775
> Fax: +27 (0) 86 633 2999
>
> http://www.kallieswanepoel.co.za
>
>
> -----Original Message-----
> From: For blind ham radio operators
> [mailto:[log in to unmask]] On Behalf Of Steve Dresser
> Sent: 14 November 2006 16:38
> To: [log in to unmask]
> Subject: Re: TW1 Inconsistancy
>
>
> Kallie,
>
> How are you obtaining a signal to determine your power levels? If
> you're just whistling into the mic, you'll probably get all kinds of
> variations because nobody can whistle a steady tone. However, if
> you're using a carrier, the variations may indicate some problem with
> your antenna or grounding system. Make sure you don't have any loose
> connections or damaged pieces of coax. You might try eliminating any
> extra cables in the shack to see if the problem goes away.
>
> Steve
>
> ----- Original Message -----
> From: "Kallie Swanepoel" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, November 14, 2006 06:42
> Subject: Re: TW1 Inconsistency
>
>
> > Ok my apologies
> >
> > I do not always get the same readings for the forward power
> > reflected power, and swr twice. For example I test 1 frequency on a
> > particular power setting, and move on to some other frequencies.
> > However if I get back to, say the first I've tested, the read-out is
> > not what it was the first time. I hope this helps.
> >
> > Kallie Swanepoel
> > http://www.kallieswanepoel.co.za
> >
> >
> > -----Original Message-----
> > From: For blind ham radio operators
> > [mailto:[log in to unmask]] On Behalf Of Colin McDonald
> > Sent: 14 November 2006 10:46
> > To: [log in to unmask]
> > Subject: Re: TW1 Inconsistency
> >
> >
> > what sort of inconsistencies are you getting with the tw1? Just
> > saying
>
> > you get inconsistencies and not explaining doesn't allow anyone to
> > really give you hints or anything as to what the problem may be, or
> > if
>
> > its just a function of the meter. Running the tw1 on the same power
> > supply shouldn't be an issue unless you have some kind of ground
> > loop issue or RF getting into the meter, but that is unlikely. 73
> > Colin, V A6BKX
> > ----- Original Message -----
> > From: "Kallie Swanepoel" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Monday, November 13, 2006 9:47 PM
> > Subject: TW1 Inconsistency
> >
> >
> > > Hi All
> > >
> > > I purchased a tw1 this week end, and find it a bit inconsistent
> > > with
>
> > > the read-outs. I connected it to the same power supply than I
> > > have my
> >
> > > TS2000 on. Would that have any influence? What power supply
> > > should I use, or should I use a battery?
> > >
> > > Kallie Swanepoel
> > > http://www.kallieswanepoel.co.za/
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