Not completely true.
I am using a 7610 with power set to 100% and with ALC to 0 I have 95 W
out. I have done more than 150 countries in 9 months with ALC set to 0
and 95 W. ;)
Bye,
Maurizio
Il 13/06/2019 19:34, Ron WV4P ha scritto:
Amazing how people can believe that all radios handle ALC the same.
Again.. Contrary to people's Opinions, don't be afraid of ALC,
Especially if you have an IC 7300 or 7610, if you manage to get it to
zero, have fun not making contacts. About 50% works very well.. Ron
On Thu, Jun 13, 2019, 12:11 PM Steven Greer <km4...@gmail.com
<mailto:km4...@gmail.com>> wrote:
I have to agree with Mike on this one. If you are showing any alc
your are over-driving and putting out a crappy signal. I see it
all the time. These poorly setup stations with an extra wide
signal that no one can operate next to because they are causing
distortion that is outside the bandwidth for ft8. I run an OLD
radio a Kenwood ts-520 with a home made interface. I can run my
rig all the way up to about 120 watts before showing ANY alc and
then I back it down to show NONE. This is not SSB Phone so ignore
everything about alc when it come to ssb phone operation that you
have learned. If you are showing alc your putting out a crappy
signal and you should stop. If you don't have a clue what you are
doing stop transmitting and find someone to help you that knows
something about digital operations. Those who are running crappy
signals are just ruining operations for everyone else.
Regards,
Steven Greer
K3SRG
OMISS #10630
OMISS 80M Band Coordinator
NOTE: This e-mail was made with 100% recycled electrons. No
electrons were harmed, No trees were destroyed, No animals were
killed, and No political correctness was observed in making or
sending this message.
On 6/13/19 12:39 PM, Black Michael via wsjt-devel wrote:
Nobody is saying that ALC is the cause of the problem. There's
lots of things feed into the ALC.
It's simply an indication that SOMETHING is over driving the rig
when the ALC indicates more then 0dB of attenuation.
I think you'll find if you reduce the USB Mod Level you'll find
the ALC can be reduced to 0 on the scale and still get 90W out if
WSJT-X is at full power and you have 0dB on the Playback device.
I've done that on about 5 IC-7300's and they all end up at either
6 or 7 on the USB Mod Level.
de Mike W9MDB
On Thursday, June 13, 2019, 11:27:43 AM CDT, Roy Gould
<roygou...@gmail.com> <mailto:roygou...@gmail.com> wrote:
For what it's worth, I have a different view of how ALC works.
First of all, I don't think that properly implemented ALC causes
more than a trivial amount of distortion in the signal.
Audio processors in studio sound boards and in commercial radio
stations use it routinely. It has the benefit of
stabilizing the audio level. The FT8 signal has constant
amplitude so ALC does not have to work hard at all.
It just sits there maintaining constant transmitter output power.
I checked to see what the ALC was doing in my ICOM IC-7300 and
saw that it was about 55%, which is perhaps
a little too high. So I reduced the _Speakers (USB Audio CODEC)_
from 20% to 15% and the ALC dropped to 45%.
I am using the built in soundcard in the IC-7300. I am not having
any problems in making contacts and I think
that my signal is clean. To prove otherwise would require using
laboratory instruments to test the signal...
73, Roy, W7IDM
On Thu, Jun 13, 2019 at 8:47 AM Ryan Tourge
<ryan.tou...@gmail.com <mailto:ryan.tou...@gmail.com>> wrote:
I have used the following method regardless of radio used...
Use an external power meter (after the transmitter).
Adjust audio gain/drive until the point where power meter
stops rising. At this point, the radios ALC meter will start
to show some deflection. Back the audio back slightly. The
power output will stay about the same and ALC will be "0" on
the radio's meter.
Make contacts :)
On Thu, Jun 13, 2019 at 7:42 AM Black Michael via wsjt-devel
<wsjt-devel@lists.sourceforge.net
<mailto:wsjt-devel@lists.sourceforge.net>> wrote:
Only when the manual is correct. Most are wholly
inadequate in this respect. Mainly due to not addressing
digital modes at all. Even Kenwood's own TS-890S
multi-lingual manual doesn't mention this.
I just worked with a user yesterday with in IC-7000 and
RigBlaster Advantage in the ACC socket and had to have
the MIC level set at 1 and we could crank up the
RigBlaster TX to get 90W without any ALC action on the
rig. If we cranked up the MIC gain and turned down the
RigBlaster TX we could get ALC action at 10W (note that
the rig was always set at 100W).
Any manual that talks about SSB Phone mode needs to be
ignored as it has nothing to do with digital operations.
My main point is that if you can get 90W without ALC
indication you are pretty well guaranteed your signal is
as clean as it can get. And I've been able to get 90W/No
ALC on 99% of the rigs I've dealt with.
de Mike W9MDB
On Thursday, June 13, 2019, 01:06:46 AM CDT, Roeland
Jansen <roeland.janse...@gmail.com
<mailto:roeland.janse...@gmail.com>> wrote:
so we agree that we should follow the manuals of the
manufacturers?
On Wed, Jun 12, 2019 at 4:56 PM Black Michael via
wsjt-devel <wsjt-devel@lists.sourceforge.net
<mailto:wsjt-devel@lists.sourceforge.net>> wrote:
I finally got a reply from Kenwood for the TS-990S --
this quite likely applies to all the Kenwood's with
the red ALC zone.
The bottom of the meter is 0dB ALC. I would maintain
once you see the "beings to swing" you back off a bit
for no swing.
You won't find the PSK31 words in the multi-lingual
manual...it's in the English manual (and perhaps the
other individual languages).
It tells you to set the rig for almost no ALC indication.
de Mike W9MDB
Regarding the ALC 0dB and +6dB, refer to the picture
below.
In the TS-990S instruction manual, it is mentioned as
follows.
---------------------------------------------
In the case of operation in the digital mode such as
PSK31 using
a PC, you must adjust the audio output level from PC
until the ALC
meter of the transceiver begins to swing.
---------------------------------------------
The level "begins to swing" is not zone max (+6dB)
but threshold 0dB.
On Thursday, June 6, 2019, 01:09:07 AM CDT, Wolfgang
<oe1...@gmail.com <mailto:oe1...@gmail.com>> wrote:
There is a common belief that became an internalized
misentrepretation:
"NO ALC", or even "ALC is bad", this can not be
applied to all rigs. On a
Kenwood rig the manual says, you should not go
(drive) the rig beyond the
red bar.
For example, the Kenwood TS990 audio input setting to
"no ALC" will result
in an Power output that goes down to indeterminable
value, compared to the
Po setting on the front panel knob & meter.
So please consult your rigs manual, the designers
gave you the right info.
73 de Wolfgang
OE1MWW
----------
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free-of-charge communication!
Amateurfunk ist die teuerste Art der kostenlosen
Kommunikation!
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