Of course, it is arguable to what extent JT-65 represents a “true QSO” — the following articles make for some interesting reading, and show that the situation is not altogether back and white: http://www.sm2cew.com/jt65.html <http://www.sm2cew.com/jt65.html>
73, Matt VK2RQ > On 14 Jan 2015, at 6:39 am, Edward R Cole <[email protected]> wrote: > > When Harry first posted > >On 1/5/2015 5:50 PM, Harry Yingst via Elecraft wrote: > > JT65 is indeed audible and has a very distinct sound. > > I was tempted to reply when first posted but decided it wasn't worth > bothering since it was obviously from someone who totally did not understand. > But now it has been repeated, so you asked for this (and I am replying > politely): > > If you stand next to a horn being played, does it make a sound?...if you are > a thousand miles away from the horn does it still make a sound? Yes to both > questions. But can you hear the sound when you are a thousand miles away? > Not by ear. > > Is CW audible in a radio receiver tuned to receive it? Yes - If the signal > is strong enough. If you cannot hear the CW signal can you copy the CW > message...nope. > > JT-65 can be heard by a receiver set up in CW or SSB and properly tuned...if > the signal is strong enough. If the signal is not strong enough to be heard, > the JT65 signal can still be decoded (quite easily) though you will hear > nothing in the receiver. This is at a signal level from about -20 to -28 dB > SNR as received with a 2.5-KHz bw SSB receiver. > > To state this a little differently, JT-65 can be decoded down to about 8-dB > below the signal level that CW is not longer audible. JT-65 and CW are > equally audible if the same signal strength. > > 73, Ed - KL7UW > PS: if you do not like computers why are you using one to post e-mail? If > you prefer CW, then by all means use CW. JT-65 is simply an alternative mode > which works better with extremely weak signals. Human intervention is > required for either mode. To say JT-65 use is not human-to human is > insulting the user. > > ------------------------- > From: "Wes (N7WS)" <[email protected]> > To: [email protected] > Subject: Re: [Elecraft] Lids running RTTY on the JT65 Frequency > Message-ID: <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Well, if it's audible, then why not use CW? Much faster, even with slow > keying, > and they are human-to-human contacts. The bragging I've heard is of the type, > "I worked VK0H with 100 mW into a wet string antenna laying on the ground. > Who > needs QRO?" > ==snip > X. > > > > 73, Ed - KL7UW > http://www.kl7uw.com > "Kits made by KL7UW" > Dubus Mag business: > [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
