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



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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



--

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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

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



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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

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

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

Thierry wrote:

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 real pity is in the fact that a ham has such a ****-poor
understanding of how SSB modulation works. Furthermore, if you want to
talk "out of subject", perhaps you might want to check your own messages
on rec.radio.* forums. Also, if you choose to interpret replies to your
messages that don't kiss your ass as "bad ham spirit", that's your
prerogative. Now back to the topic:

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...

This is a complete bull****. How do you know you don't have 100W on SSB?
Have you used an accurate laboratory standard peak-reading wattmeter? Do
you understand the nature of the SSB voice modulation? It is unrealistic
to expect that your general purpose amateur radio wattmeter will
indicate 100W during a normal SSB transmission. Just a reminder: an SSB
voice transmission transmits a modulated signal that has a dynamic
response of 20-30 dB, which means that the peak power of plosives will
be fairly close to 100W while fricatives, nasals and vowels will produce
anywhere from 0.1W to 100W, depending on your speech (which, in turn,
depends on the language, sex, physiognomy and many other individual
factors).
You want us to believe that although Kenwood provides a technical
specification for its transceivers (TS-570 included) that claims 100W
output on all amateur bands and in CW, SSB, FM and FSK modes, they fail
to deliver on this specification because they employ an "audio limiter",
so the way to get full power out of the rig is to bypass this circuit???

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.

In other words, you can use an accessory DIN connector in the back to
input audio instead of going through the mike plug. The problem is that
this input goes to the same spot as the mike audio input. But, wait,
here's a magic solution:

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.

And here we go, just what I was talking about when I said you were
wasting time on CB-like schemes - that band is full of "experts" who
"increase" their power by employing all kinds of charlatan mumbo-jumbo
techniques, from audio boosters to magical 30 dB gain antennas. The
results are obvious for anyone who ever bothered to listen to that ****
when they illegally encroach on our 10 meter band.

Now you come along and make an ass of yourself first by completely
misunderstanding how SSB power is measured, then by modifying a properly
functioning rig with what can only be interpreted as a mod to eliminate
the ALC circuitry. The result will be your signal splattered all over
the bands and an increase in TVI.
Last, but not least, even if what I said was completely untrue, even if
you were able to magically "increase" your SSB power from, say 70W to
100W, this increase in power would result in the astoundingly lame 1.5
dB!!! And this at the expense of splattering the bands?

I told you once and I'll tell you again: build a better antenna instead
of wasting time on CB-like schemes.



73 .... WA7AA



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