Hi,

If you have an external wattmeter connected to your transmitter, can you
make a test at 100 Watts PEP and give me your true emitting power in watts ?

Speaking normally (without shouting) in their mike with normal compression
(10 over 25), some hams say that their wattmeter displays a power of about
50-60 watts (of course in CW they reach 100 W)
But some arrive to move the niddle to about 100 watts in SSB using their
barefoot RTX...

It seems that some RTX can reach the nominal power doing a hardware
modification at the mike itself to increase the 60 w displayed in SSB to
about 100W. According these hams there is no disadvantage to make this
change.

The problem mainly occurs of the Kenwood TS-570D (all the serie in fact)
using a handy mic or even a desk model (the ones sold by Kenwood).
The same problem occurs with the Yaesu 1000 MP (tested at 100 W).

If such a modification exists for that TS570D or for any mic, can a ham do
it himself or can he ask his dealer to make the modificationcan
Where on the Internet can we find this procedure ?

Thanks in advance

Thierry
ON4SKY, LX3SKY
http://www.astrosurf.com/lombry

Thierry wrote:

Speaking normally (without shouting) in their mike with normal compression
(10 over 25), some hams say that their wattmeter displays a power of about
50-60 watts (of course in CW they reach 100 W)
But some arrive to move the niddle to about 100 watts in SSB using their
barefoot RTX...

This is nonsense, Thierry. If you shout loud enough into the microphone,
of course you'll notice a higher power reading on the wattmeter, but
so what? SSB transceiver should be adjusted so that the reading on the
ALC scale stays within limits. Anything else is overmodulating and
causing splatter.

It seems that some RTX can reach the nominal power doing a hardware
modification at the mike itself to increase the 60 w displayed in SSB to
about 100W. According these hams there is no disadvantage to make this
change.
[snip]
If such a modification exists for that TS570D or for any mic, can a ham do
it himself or can he ask his dealer to make the modificationcan

There is an audio booster circuit, which is actually a dynamic
compressor and it works by increasing the level of the softer portions
of your speech while keeping the louder portion the same (hence dynamic
compression). If properly adjusted, it may give you some signal boost.
The drawback is that the other side will be able to hear a mosquito fart
in your shack if the signal is good.

Then there's a high audio booster, which increases the higher frequency
portion of your speech, but this is generally included in modern rigs.

If your mike can drive your Kenwood's ALC to the limit when speaking
normally, there is nothing wrong with it. Build a better antenna instead
of wasting time on CB-like schemes.

73 .... WA7AA



--

Anti-spam measu look me up on qrz.com if you need to reply directly

Hi,
You partly right but this is well what I said in my post. The problem I
speak about is completely different.
As usual your comments are out of subject and from what I read you don't
even know the problem trying to compare wmy request to "CB". ! It is a pity
that an ham has a so bad ham spirit....

The reason I don' have 100W on SSB is due to the audio limiter so by
bypassing it I can get 100 w whatever your (false) opinion in that matter.
This is nothing to do with the compressor...

An accessory plug can bypass audio and therefore left the mic connector
unchanged so I can either use the TS570D in the standard way or connect a
mic to the accessory plug and operate full power SSB.

The mod is relatively simple and requires a jumber and the removal of 3 or 4
smt components.
Of course this is not thanks to you that I had this information that may
interest others hams. Others did hopefully.

Thierry
ON4SKY, LX3SKY


"Zoran Brlecic" wrote in message
...
Thierry wrote:

Speaking normally (without shouting) in their mike with normal
compression
(10 over 25), some hams say that their wattmeter displays a power of
about
50-60 watts (of course in CW they reach 100 W)
But some arrive to move the niddle to about 100 watts in SSB using their
barefoot RTX...

This is nonsense, Thierry. If you shout loud enough into the microphone,
of course you'll notice a higher power reading on the wattmeter, but
so what? SSB transceiver should be adjusted so that the reading on the
ALC scale stays within limits. Anything else is overmodulating and
causing splatter.

It seems that some RTX can reach the nominal power doing a hardware
modification at the mike itself to increase the 60 w displayed in SSB to
about 100W. According these hams there is no disadvantage to make this
change.
[snip]
If such a modification exists for that TS570D or for any mic, can a ham
do
it himself or can he ask his dealer to make the modificationcan

There is an audio booster circuit, which is actually a dynamic
compressor and it works by increasing the level of the softer portions
of your speech while keeping the louder portion the same (hence dynamic
compression). If properly adjusted, it may give you some signal boost.
The drawback is that the other side will be able to hear a mosquito fart
in your shack if the signal is good.

Then there's a high audio booster, which increases the higher frequency
portion of your speech, but this is generally included in modern rigs.

If your mike can drive your Kenwood's ALC to the limit when speaking
normally, there is nothing wrong with it. Build a better antenna instead
of wasting time on CB-like schemes.

73 .... WA7AA



--

Anti-spam measu look me up on qrz.com if you need to reply directly

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

"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