Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.



Ed

And let us not even broach the subject of 'splatter' caused by overdriving
and the resulting distortion.

Dan/W4NTI

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.



Ed

"Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message
link.net...
And let us not even broach the subject of 'splatter' caused by overdriving
and the resulting distortion.

Hi,

The few OM knowing the problem and how to solve it, have not speak yet about
distorsion of any kind.
They compared the TS570D with a TS440S that give well all its 100W in SSB.
The second produce not QRM at all and work really fine (over 290 DXCC in
about 4 years without the slightest comment about a bad modulation, QRM or
whatever...

In all cases if there is any risk to blow out a component or to create QRM
or anything else, then indeed I don't really see the advantage of this
modification. But this is too early to conclude and give an opinion.

I am waiting the full explanation about this mod and about its
"side-effects". If you are interested in I will post another message as soon
as I get it.

Thierry
ON4SKY, LX3SKY


Dan/W4NTI

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings
of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.



Ed

Hi,

The few OM knowing the problem and how to solve it, have not speak yet
about
distorsion of any kind.
They compared the TS570D with a TS440S that give well all its 100W in SSB.

Sorry it was not a 440S but well a TS840S.

Thierry

Hi,

The few OM knowing the problem and how to solve it, have not speak yet
about
distorsion of any kind.
They compared the TS570D with a TS440S that give well all its 100W in SSB.

Sorry it was not a 440S but well a TS840S.

Thierry

"Dan/W4NTI" w4nti@get rid of this mindspring.com wrote in message
link.net...
And let us not even broach the subject of 'splatter' caused by overdriving
and the resulting distortion.

Hi,

The few OM knowing the problem and how to solve it, have not speak yet about
distorsion of any kind.
They compared the TS570D with a TS440S that give well all its 100W in SSB.
The second produce not QRM at all and work really fine (over 290 DXCC in
about 4 years without the slightest comment about a bad modulation, QRM or
whatever...

In all cases if there is any risk to blow out a component or to create QRM
or anything else, then indeed I don't really see the advantage of this
modification. But this is too early to conclude and give an opinion.

I am waiting the full explanation about this mod and about its
"side-effects". If you are interested in I will post another message as soon
as I get it.

Thierry
ON4SKY, LX3SKY


Dan/W4NTI

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings
of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.



Ed

And let us not even broach the subject of 'splatter' caused by overdriving
and the resulting distortion.

Dan/W4NTI

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.



Ed

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.

Hi Ed,

Yes for sure. But I think that it rather displays the "instantaneous"
modulation not an average because when I shout at the mic or using the key
the nidddle reaches immediately the maximum without delay and speaking
normally I emit about 40-60 watts only, moving up and down at the rate of my
words.

This is not really a "problem" of power or with the microphone or even with
the compression level, because Kenwood made some tests for me and confirmed
that hardware speaking the emitter and the microphone were OK, whatever the
mode, see my EXCEL sheet with power measurements,
http://www.astrosurf.com/lombry/qsl-ts570-3.htm (end first screen).

But comparing to others TX (i.e. TS440S) there is a huge difference when
speaking at the mic.
My TS570D and Yaesu 1000MP (reduced at 100W) give about 60W instead of 100W
in SSB speaking normally, conversely to TS440S and many olders that give all
their full power, without having made any modification on the RTX.

I have not tested many rigs, but it seems that the audio of olders models
(made 20 years ago) was manufactured differently from the new one (last 5
years), may be is this justify to protect a relay or another component, I
don't know.
But the problem is that I bough a 100W emitter and not a 60W...

I will soon get the modification to make using the accessory plug in order
to not modify the mic itself.

Thierry

PS. And for those who wonder why I do not do "CB" (??) or buy a beam, I
already use a 4 ele beam... and sorry for the ones that confuse ham and CB,
I do not share at all any passion for the 11m like them.





Ed

Thierry wrote:

"Ed G." wrote in message
. ..


Question for Thierry: Can I assume you have a "Peak" reading
wattmeter? Otherwise, you are aware, I hope, that most wattmeters are
"average" power reading and that they can not display the peak readings of
a SSB transmitted signal.... thus they will never display close to the
100watts of a 100watt rated SSB signal; unless you are modulating the
transmitter with a test tone audio source.

Hi Ed,

Yes for sure. But I think that it rather displays the "instantaneous"
modulation not an average because when I shout at the mic or using the key
the nidddle reaches immediately the maximum without delay and speaking
normally I emit about 40-60 watts only, moving up and down at the rate of my
words.

This is not really a "problem" of power or with the microphone or even with
the compression level, because Kenwood made some tests for me and confirmed
that hardware speaking the emitter and the microphone were OK, whatever the
mode, see my EXCEL sheet with power measurements,
http://www.astrosurf.com/lombry/qsl-ts570-3.htm (end first screen).

But comparing to others TX (i.e. TS440S) there is a huge difference when
speaking at the mic.
My TS570D and Yaesu 1000MP (reduced at 100W) give about 60W instead of 100W
in SSB speaking normally, conversely to TS440S and many olders that give all
their full power, without having made any modification on the RTX.

I have not tested many rigs, but it seems that the audio of olders models
(made 20 years ago) was manufactured differently from the new one (last 5
years), may be is this justify to protect a relay or another component, I
don't know.
But the problem is that I bough a 100W emitter and not a 60W...

I will soon get the modification to make using the accessory plug in order
to not modify the mic itself.

Thierry

PS. And for those who wonder why I do not do "CB" (??) or buy a beam, I
already use a 4 ele beam... and sorry for the ones that confuse ham and CB,
I do not share at all any passion for the 11m like them.




Ed



Just out of curiosity - all these measurements used the same power
meter?

I don't recall ever seeing 100W on SSB with my TS-430, TS-440 or TS-570
when speaking, a steady tone will do it of course.

Dave

"Dave Holford" wrote in message
...

...

Thierry wrote:
Just out of curiosity - all these measurements used the same power
meter?

Yes of course.


I don't recall ever seeing 100W on SSB with my TS-430, TS-440 or TS-570
when speaking, a steady tone will do it of course.

Hi,

This is the first time that we note this problem too and the problem was
detected by chance... :-((
All users are exprimented OM some for decades and never observe this
effect... All told me that indeed their TX cannot emit its full power in SSB
but rather 50-60% in speaking normally. So we were very surprised than one
of us could reach the full power...

Our friend used a TS-840S and some olders and show us at the radioclub what
the matter with its TX.
He nearly reaches and sometimes exceed the 100W...in SSB, something we even
can't get using a yaesu 1000 MP of the last generation !

So as he recently bought the new TS570D he immediately noticed the
difference. Even using an electret microphone (using a battery and known to
boost emissions much more than a dynamic one) he cannot get the full power
of its older TX. Therefore we did some complementary measurements and have
searched for some information. Hence this post and some others

So at first sight I suspected an error in its reading procedure, etc. But
not at all...
Someone having read my TS570D review on Internet explained me that he knew
the problem and how to solve it.

I am waiting now more detail (how to increase the signal and what about QRM,
etc).

Thierry


Dave