Mel,
Guess you are unaware, but I am on 6m-eme, 2m-eme, and 23cm-eme. The
RTLT is approx 2.5 seconds. But voice is rarely used and eme
stations rarely operate in Duplex. Of course one can receive your
own reflected signal for a short duration; that is called receiving your echo.
73, Ed - KL7UW
At 03:13 PM 4/9/2017, Mel Farrer wrote:
You think that delay is something try EME. At least there you have
a decent delay to get use to.
Mel, K6KBE
From: Edward R Cole <kl...@acsalaska.net>
To: Elecraft Reflector <elecraft@mailman.qth.net>
Sent: Sunday, April 9, 2017 4:08 PM
Subject: Re: [Elecraft] K3S SSB TX monitor - feature request
Just supplemental comments to what Joe has written:
Having monitor of speech is certainly important for speaking properly
(or singing). Note that speech able people who lose their hearing
slowly also loose the ability to talk properly. If you are hard of
hearing you might talk too loud; happens to me on occasion; its just
your neural feedback loop doing "human ALC", as it were.
For those who operate voice modes on satellites the time delay
produced on monitoring your transmission with a full duplex station
can get madding. The delay is caused mainly by RTLT (round trip
light time) which is the time delay for the signal to travel round
trip from the satellite. For HEO (high Earth orbiting) satellites
the range gets to a point to experience significant delay in your
voice monitored in the downlink Rx. On AO-10/13/40 it could be
challenging to talk properly hearing your own voice delayed. I would
sound like: hello-ello, how-ow, are-re, you-ou. Say that at a normal
speaking rate and you will get the idea what it sounded like.
Full duplex operation is quite useful in satellite operating:
1. Avoid talking on top of another station
2. Making frequency adjustment for Doppler
3. Verifying you have an adequate uplink into the system to be heard.
Many learned to compensate (mentally disregarding their own voice -
which is difficult), or turning down the Monitored audio level when
transmitting.
Ed - KL7UW
Subject: Re: [Elecraft] K3S SSB TX monitor - feature request
Message-ID:
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On 4/8/2017 5:07 PM, Dave Fugleberg wrote:
> At any rate, at a 'normal' (for me) monitor level, it's not
> objectionable (or even really noticable) in my external speaker. The
> only way I could induce audio feedback was to hold the mic right in
> front of the external speaker with MON set at or near maximum.
There we agree ... where the monitor level is set to be usable in the
headphones, it does not cause a feedback issue even if the speakers
are turned on. However, if one is using low sensitivity headphones
with the speakers turned up high *and* high mic gain, one can cause
feedback or echo. Rather than insisting on a change in the way the
K3/K3S operates, one would be better served to repair the issues in
his own configuration!
73,
... Joe, W4TV
73, Ed - KL7UW
<http://www.kl7uw.com/>http://www.kl7uw.com
Dubus-NA Business mail:
<mailto:dubus...@gmail.com>dubus...@gmail.com
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http://www.kl7uw.com
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