umi
To: wsjt-devel@lists.sourceforge.net
Sent: Saturday, March 4, 2017 2:58 AM
Subject: Re: [wsjt-devel] JT65 HF bands capacity, spectra allocation, and
software support
All;
This Saturday afternoon, 15m is crowded and occupied with 100 TX , 83 RX
stations according to JT Alert and the mos
On 4/03/2017 7:58 PM, Takehiko Tsutsumi wrote:
> This Saturday afternoon, 15m is crowded and occupied with 100 TX , 83
> RX stations according to JT Alert and the most strong spectrum on 15m
> exists on JT65 channel
100 stations TX does not represent 100 simultaneous transmissions.
It represents
El 04/03/17 a las 09:58, Takehiko Tsutsumi escribió:
> All;
>
> This Saturday afternoon, 15m is crowded and occupied with 100 TX , 83 RX
> stations according to JT Alert and the most strong spectrum on 15m
> exists on JT65 channel. Wsjt-x Water fall window is really colorful.
> See attached scre
Hi Igor,
On 2/24/2017 3:10 PM, Игорь UA3DJY wrote:
> Just to avoid any possible confusion: we have still been waiting
> for response from Joe K1JT on this subject.
I do not understand why you would be waiting for a response from me.
The purpose of the WSJT Development Group is to design digital
sjt-devel] JT65 HF bands capacity, spectra allocation, and software
>support
>From: Takehiko Tsutsumi - 2017-02-24 05:21:56
>Attachments: Message as HTML
>
>Joe,
>
>Thank you very much for your explanation.
>
>I will ask detail analysis about available bandwidth to digital
regulators.
2. Your proposal will break the wall for SDR application program
development. We will see $100 QRP SDR transceivers will dominate HF
bands soon.
Regards,
take
de JA5AEA
*Re: [wsjt-devel] JT65 HF bands capacity, spectra allocation, and
software support
<https://sourceforge.ne
Hello Tsutsumi san and All,
.
Limitation is coming from sound card sampling rate:
.
48kHz -> 20kHz
96kHz -> 40kHz
192kHz -> 80kHz bandwidth.
.
We getting a bit less than 50% bandwidth of reliable data after the Fast
Fourier transform.
.
73 Igor
.
>Re: [wsjt-devel] JT65 HF bands capac
incumbent at strong position from the beginning.
Would you explain the reason why you pick up 20KHz number?
Regards,
take
de JA5AEA
Date: Thu, 23 Feb 2017 08:27:43 +0300
From: ? ?
Subject: Re: [wsjt-devel] JT65 HF bands capacity, spectra allocation
and software support
To: wsjt-devel
Hello Tsutsumi san and All,
.
This may be the way we will go further with JT modes on HF bands:
.
1. 20 kHz processing bandwidth support in JT software, as we can share RTTY
spectra now
2. Shared common band for JT65 and JT9 communication modes
3. Expansion of the narrow digital modes frequency al
Hi Igor,
In the thread concerning your proposal i.e. "new concept for JT65 HF
usage and spectra allocation", I do not see any objection to your
proposal but several comments about observation, analysis and
alternatives i.e. JT9 to be able to delay the expansion timing.
Thus, I wish to hear
Hi Igor,
some comments in line below.
On 18/02/2017 19:12, Игорь Ч wrote:
There is simple answer why users prefer operate JT65 on the overloaded
HF bands while there is underused JT9 subband.
I am not sure it is simple, there are many factors, here are some of them:
* Many users persist wit
With all due respect "weak signal" does not always equal "low power" (most of
the time, sure, but a signal can be pretty weak even at 1.5 KW in poor
conditions).
Can you supply actual data to support your supposition that "high power usage
is a common behavior" in the PSK areas (i.e. Something
On Fri,2/17/2017 11:47 PM, Игорь Ч wrote:
> Due to the current explosive growth of HF activity in JT65a mode we
> are getting close to a date when existing JT65 bandwidth will be fully
> utilized leaving no possibility for weak signal communication but
> local contacts.
There's a much simpler s
Hello All,
There is simple answer why users prefer operate JT65 on the overloaded HF bands
while there is underused JT9 subband.
.
Anyone from DX location, let's say for instance from New Zealand, have
frequently met scenario where multiple signals coming back to his CQ call.
.
Due to the natur
Sent: Saturday, February 18, 2017 8:27 AM
Subject: Re: [wsjt-devel] JT65 HF bands capacity, spectra allocation and
software support
The simple solution to this problem is JT9.
I just cannot understand why this mod
The simple solution to this problem is JT9.
I just cannot understand why this mode is so underutilised.
73 de Guy G4DWV/4X1LT
--
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slash
To add to Bill's very well written response, there are many pre-established
operations on 40 meters around the JT mode watering hole. Using my Flex 6300, I
can see many SSB Phone QSO's going on on 7.072-3 and 7.080 from Canadian and
some other ITU Region 1 entities. Even though the band may seem
On 18/02/2017 07:47, Игорь Ч wrote:
> Due to the current explosive growth of HF activity in JT65a mode we
> are getting close to a date when existing JT65 bandwidth will be fully
> utilized leaving no possibility for weak signal communication but
> local contacts.
> .
> It might be right time no
On 02/18/2017 08:47 AM, Игорь Ч wrote:
Hi Igor & all,
In my opinion, this growth of HF activity is a good thing. Often the use
of these modes is a tentative to compensate for antenna and power
limitations.
There exists a general problem related to the band plans. Often there is
to many space res
Hello Joe and All,
.
Due to the current explosive growth of HF activity in JT65a mode we are getting
close to a date when existing JT65 bandwidth will be fully utilized leaving no
possibility for weak signal communication but local contacts.
.
It might be right time now to act towards the new con
20 matches
Mail list logo
