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Re: Topband: Top Band and JT65

To: "" <>
Subject: Re: Topband: Top Band and JT65
From: DXer <>
Date: Sat, 20 May 2017 15:23:15 -0400
List-post: <">>

The technical explanation takes into account a number of conditions. The details are all available on K1JT's website. If memory serves, it uses 2.5kHz BW in the calculations. CW will have different readings depending on the BW used.

All I can say, as a user of the mode, is that in many instances there is absolutely no recoverable audio, or waterfall inprint, and you get a decode.

As for power, as I mentioned earlier, the JT modes are weak signal modes, not necessarily low power modes. In my case, I'm limited to whatever the IC-718 can safely output, which is around 30/35 watts.

With that power, and a Hustler 6BTV at ground level and no radials, I was being received, and worked, a number of VK stations on 40M yesterday. Something that is trivial for some, but a big deal for me.

73 de Vince, VA3VF

On 2017-05-20 2:58 PM, Richard (Rick) Karlquist wrote:
I've never operated JT65, so maybe some of you experts
can answer a beginner's question.  Searching on line,
it is difficult to get a definitive answer to how much
advantage it has over CW, but the number seems to be
around 10 dB.  Maybe not even that much if the receiving
station is using an SDR with very narrow CW bandwidth.
So a CW station with a legal limit amplifier
gets out better than a JT65 station without an amplifier.
But I keep hearing about JT65 stations running low power,
not even 100W barefoot.  It seems like if we could get
antenna challenged stations to run high power on CW,
there would be no need for JT65 in the first place.
Do any significant number of 160 meter QSO's occur on JT65 at
legal limit power levels, like they routinely do on EME?

Rick N6RK

On 5/20/2017 3:48 AM, Dale Putnam wrote:
It seems the the something worth working for would be worth striving
for. Having WAS on 160 Qrp posted on the wall always reminds me of the
effort of operating and the time spent learning about antennas that
actually work over the long haul distances required.
  Instead of taking many minutes many of the qsos were quick and snuck
in between static crashes as opposed to slow and determined.
  To each his own. Work whatever mode works for you.  Does using ssb
rather than cw change the value of the Q? Only in the eye of the
beholder. Not so much to the been there done that kinda guy.

Make this a great day

On May 19, 2017, at 10:03 PM, DXer <> wrote:

WSJT-X 1.7.0

There is JTDX, based on WSJT-X, but with some additional tweaks for
the HF user.

73 de Vince, VA3VF
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