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