Yes, back in the 70's, Yes, I am long in the tooth. One of my friends up north
was just getting on the air EME and he had a SUBSTANTIAL station and antenna
and started calling, " Hello, hello" and someone answered! he kept it up and
then started to listen to the returned signal then he said, " I think I am
talking to myself". He recorded it and we all laughed at one on the early
West Coast VHF conferences. Those were the days my friends.....
Mel, K6KBE
From: Edward R Cole <[email protected]>
To: Mel Farrer <[email protected]>; Elecraft Reflector
<[email protected]>
Sent: Sunday, April 9, 2017 5:20 PM
Subject: Re: [Elecraft] K3S SSB TX monitor - feature request
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 emestations rarely operate in
Duplex. Of course one can receive yourown reflected signal for a short
duration; that is called receiving yourecho.
73, Ed - KL7UW
At 03:13 PM 4/9/2017, Mel Farrer wrote:
You think that delay issomething try EME. At least there you have a decent
delay to getuse to.
Mel, K6KBE
From: Edward R Cole <[email protected]>
To: Elecraft Reflector <[email protected]>
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 itwere.
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. Iwould
sound like: hello-ello, how-ow, are-re, you-ou. Say that at anormal
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 beheard.
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:<[email protected]>
Content-Type: text/plain; charset=utf-8; format=flowed
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 rightin
> front of the external speaker with MON set at or nearmaximum.
There we agree ... where the monitor level is set to be usable inthe
headphones, it does not cause a feedback issue even if the speakers
are turned on. However, if one is using low sensitivityheadphones
with the speakers turned up high *and* high mic gain, one can cause
feedback or echo. Rather than insisting on a change in the waythe
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
Dubus-NA Business mail:
[email protected]
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73, Ed - KL7UW
http://www.kl7uw.com
Dubus-NA Business mail:
[email protected]
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