Michael,
One issue I found, was that even though I followed your instructions, I had my 
Win10 set to 2 channel 48Khz for recording.  Audio cleaned up very well once I 
set it to 1 channel 48Khz

__________
Dan – K4SHQ

From: Black Michael via wsjt-devel [mailto:wsjt-devel@lists.sourceforge.net]
Sent: Thursday, June 6, 2019 7:15 AM
To: David Kaplan via wsjt-devel <wsjt-devel@lists.sourceforge.net>
Cc: Black Michael <mdblac...@yahoo.com>
Subject: Re: [wsjt-devel] Observation on decoding

Gary -- I've work on a dozens of rigs...probably including all the ones you 
have.

If you are unable to get at least 90W with no ALC then something in your audio 
path is incorrect.

I'd like to work with you and ensure that either my directions need updating or 
your settings need updating.

Did you follow the procedure in the document I sent?  That has worked on every 
rig/audio combo I've tested which is over 300 operators now.

Can you call me an we can hook up and figure this out?  Gotta' make sure the 
info I'm putting out is as inclusive as possible.

321-690-2551
Mike W9MDB




On Thursday, June 6, 2019, 1:24:58 AM CDT, Gary - K7EK via wsjt-devel 
<wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>> 
wrote:


Absolutely. I own six different Icom HF rigs. All of them put out minuscule 
power unless there is a significant deflection on the ALC meter. The no ALC 
warning does NOT apply to all rigs. I agree with RTFM. You cannot go wrong.
Best regards,
Gary, K7EK
Radcliff, KY (EM77at)

Sent from BlueMail<http://www.bluemail.me/r?b=15038>
On Jun 5, 2019, at 15:42, Ron WV4P <wv4...@gmail.com<mailto:wv4...@gmail.com>> 
wrote:
Contrary to common belief..  You better feed that 7300 some ALC if you want it 
to perform. All radios are NOT the same and some need ALC. Ron, WV4P

On Wed, Jun 5, 2019, 2:34 PM Tom Ramberg via wsjt-devel < 
wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>> 
wrote:
Sorry for posting this in the wrong thread. Now Trying to delete it and repost-

OH6VDA Tom

Sendt fra min iPad Air 2

5. jun. 2019 kl. 22:26 skrev Tom Ramberg < 
oh6...@yahoo.com<mailto:oh6...@yahoo.com>>:
I just checked my computer soundcard settings and followed your procedure to 
set up the radio, the computer and the tranceiver, resulting in a seemingly 
dramatic enhancement of operation efficiency. For one thing (operator error, no 
doubt), I've never checked that the sound card sample rate was  48kHz 16-bit 
before, and of course it was not. Thanks a lot!

73 de Tom OH6VDA

Sendt fra min iPad Air 2

5. jun. 2019 kl. 15:01 skrev Black Michael via wsjt-devel < 
wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>>:
For the IC-7300 you want the ALC meter to show no action at all.  So if it ever 
bumps up at all you've got too much audio going into the rig and need to back 
off the USB Mod Level.

You should be able to transmit 100W with no ALC (or very close to 100W).

That is the goal of all rigs....some of the newer rigs will show < 0dB ALC 
(e.g. K3) though so it pays to learn what your ALC meter is really telling you. 
 The way you do that is set your rig for 100W, WSJT-X power slider at -3dB, 
computer audio out at 0dB, then adjust rig/external sound to show 50W tranmit 
power going out.  That should be 0dB ALC and shows you what to expect when 
transmitting close to the 100W.  Many rigs cannot do 100W with no ALC so have 
to back off to 95W maximum or such.  So as you gradually increase the power 
slider in WSJT-X (use the up cursor key) watch your ALC as you approach 100W.  
If you start seeing ALC you have to back off the audio level at the rig or 
external sound card so the WSJT-X slider can be at 0dB and no ALC showing.

de Mike W9MDB




On Tuesday, June 4, 2019, 12:06:34 PM CDT, Black Michael via wsjt-devel < 
wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>> 
wrote:


If you reduce power from WSJT-X (not from the rig) does your ALC drop?  If 
so...that's too much audio.

Mike




On Tuesday, June 4, 2019, 11:57:44 AM CDT, Gene Marsh < 
w8...@me.com<mailto:w8...@me.com>> wrote:


Mike,

My ALC is ~25% @80W.  But, I have no issues with transmit.  Only observing the 
double decode.  Everything else is good.

73 de W8NET Miles / “ Gene”
Secretary, Portage County Amateur Radio Service (PCARS)
3905 Century Club - Master #47
DV2/W8NET in the Philippines
Licensed since 1974

On Jun 4, 2019, at 12:46 PM, Black Michael < 
mdblac...@yahoo.com<mailto:mdblac...@yahoo.com>> wrote:
I do believe 63% audio on the IC7300 is wayyyyyy too much audio.  What does 
your ALC meter say?

de Mike W9MDB




On Tuesday, June 4, 2019, 11:44:04 AM CDT, Gene Marsh via wsjt-devel < 
wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>> 
wrote:


Joe,

My setup:

Windows 10 Pro - see the pic:

<image1.jpeg>


-rc7
IC-7300
USB audio codec @66% volume

Need more info?

I will try to save a wav file next time I see it.


73 de W8NET Miles / “ Gene”
Secretary, Portage County Amateur Radio Service (PCARS)
3905 Century Club - Master #47
DV2/W8NET in the Philippines
Licensed since 1974

On Jun 4, 2019, at 12:12 PM, Joe Taylor < 
j...@princeton.edu<mailto:j...@princeton.edu>> wrote:
Hi Gene,

I have seen nothing like the duplicate decodes you report.  Please send us the 
.wav file for one or two of your examples, and tell us something about your 
computer setup.

   -- 73, Joe, K1JT

On 6/4/2019 11:39, Gene Marsh via wsjt-devel wrote:

FT4: I have seen 7-8 times, double decoding.  Always a strong signal. Example:
image1.png
I saw that in the early days of FT8.
 Except for that, it’s working really well. (Thank you Joe and your team)
73 de W8NET Miles / “Gene”
Secretary, Portage County Amateur Radio Service (PCARS)
3905 Century Club - Master #47
DV2/W8NET in the Philippines
Licensed since 1974
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