locked Auto Antenna Tune TX- WSPR


bud Thompson N0IA
 

Auto Antenna Tune TX WSPR

Windows 10  - ICOM 7300  WSJT-X 2.2.1

REFERENCE WSJT-X 2.2. User Guide:

9. WSPR

9.1 Band Hopping

                                Schedule - TUNE ROW  BOXES

I need the following to work for my antenna -

“If the box labeled Tune is checked for a particular band, WSJT-X transmits an unmodulated carrier for several seconds just after switching to that band and before the normal Rx or Tx period starts. This feature can be used to activate an automatic antenna tuner (ATU) to tune a multi-band antenna to the newly selected band.” 


My experience is that this does not happen on each band in sequence every time.  I've watched it (like paint drying!) for hours of several cycles - not all bands marked "TUNE" are honored each time.  It is not band-specific so far as I can tell.  Each band might work over hours - but definitely not every time needed.

I'm assuming the ENABLE TX must be used. (But would hope not!  I want to be able to just RX on WSPR for long periods of time. My goal would be to not have to ENABLE TX, but first things first -

I need a few seconds of TUNE at the beginning of each new band even on RX so my auto tuner will trim my wire. 

“ WSJT-X executes a successful band-change command to a CAT-controlled radio, it looks for a file named user_hardware.bat, user_hardware.cmd, user_hardware.exe, or user_hardware in the working directory. If one of these is found, WSJT-X tries to execute the command. . .”

That would work for me - if I knew much about the programming required - which is not the case.  If there are example files - I might be able to do some text editing if needed.

bud N0IA

Lakewood, CO

 


Bill Somerville
 

On 18/11/2020 21:32, bud Thompson N0IA wrote:

Auto Antenna Tune TX WSPR

Windows 10  - ICOM 7300  WSJT-X 2.2.1

REFERENCE WSJT-X 2.2. User Guide:

9. WSPR

9.1 Band Hopping

                                Schedule - TUNE ROW  BOXES

I need the following to work for my antenna -

“If the box labeled Tune is checked for a particular band, WSJT-X transmits an unmodulated carrier for several seconds just after switching to that band and before the normal Rx or Tx period starts. This feature can be used to activate an automatic antenna tuner (ATU) to tune a multi-band antenna to the newly selected band.” 


My experience is that this does not happen on each band in sequence every time.  I've watched it (like paint drying!) for hours of several cycles - not all bands marked "TUNE" are honored each time.  It is not band-specific so far as I can tell.  Each band might work over hours - but definitely not every time needed.

I'm assuming the ENABLE TX must be used. (But would hope not!  I want to be able to just RX on WSPR for long periods of time. My goal would be to not have to ENABLE TX, but first things first -

I need a few seconds of TUNE at the beginning of each new band even on RX so my auto tuner will trim my wire. 

“ WSJT-X executes a successful band-change command to a CAT-controlled radio, it looks for a file named user_hardware.bat, user_hardware.cmd, user_hardware.exe, or user_hardware in the working directory. If one of these is found, WSJT-X tries to execute the command. . .”

That would work for me - if I knew much about the programming required - which is not the case.  If there are example files - I might be able to do some text editing if needed.

bud N0IA

Lakewood, CO

Hi Bud,

WSJT-X assumes that a band set as "Rx Only" is not one your license allows you to transmit on.

73
Bill
G4WJS.


bud Thompson N0IA
 

Bill-  Thanks for the response-  I don't think that is the point.

WSPR is RX only on any band that is selected (licensed authorization not considered.)  It can run just fine w/o any TX ever if wanted, but one or more bands must be selected.  

The set up is to select the bands wanted -  for what times of day, etc.  If a band is not checked it is not included in the scan sequence ever.  Any band selected may be muted (skipped) at times based on the local time of day.  So sometimes a band is skipped in the sequence based on the sun. 

If ENABLE TX  is set - WSPR will TX on all bands selected - in a sequence based on the percentage of TX selected - i.e, not every band is on TX every cycle, just RX.

When TUNE BOX is selected for a band the radio should transmit a short 2-3 seconds TUNE carrier to initiate tuning by an automatic tuner when that band is the band for the sequence  -TX or RX!.  (If autotuning is needed for a TX sequence it is obviously needed if only RX on that band in the sequence.)  The catch is that if a TX cycle is needed the antenna tuner will tune the antenna during the first few seconds of the TX and little is lost in a two-minute TX. (However, I think the system is set up for the short TUNE followed by the full TX even when that band is the band for the sequence.

But if a band sequence is started on a band that is not auto-selected for TX during that sequence few decodes will be made as the antenna has not been tuned.

This leads to the likelihood that in a completely RX only WSPER set up with an antenna that needs tuning on each band - few decodes will ever be made!

So back to my concern that in my case I need that autotuner tweaked any time there is a band change during WSPR operation.

Hope more can read my request and help will a solution.

PS:  If I had a balanced all-band antenna this would not be a problem.  That is far from the case here in my HOA-governed 18-unit Townhome neighborhood!  That said, my  57-ft end-fed wire under the roof overhang at 28 ft agl fed with remote autotuner has been heard in Antarctica and Europe. ( WSJT-x is fantastic!)

Thanks, again
bud N0IA


 

Bud, 

I think the problem is how do you auto-tune on a band you are not allowed to transmit. Auto-tune, by its nature requires you to transmit a few watts, so that the tuner can adjust its settings. I don't know of any external tuner that can adjust itself based on received signal strength. Most times it will require manual adjustment.

73 Phil GM3ZZA

On 19 Nov 2020 20:50, bud Thompson N0IA <budn0ia@...> wrote:
Bill-  Thanks for the response-  I don't think that is the point.

WSPR is RX only on any band that is selected (licensed authorization not considered.)  It can run just fine w/o any TX ever if wanted, but one or more bands must be selected.  

The set up is to select the bands wanted -  for what times of day, etc.  If a band is not checked it is not included in the scan sequence ever.  Any band selected may be muted (skipped) at times based on the local time of day.  So sometimes a band is skipped in the sequence based on the sun. 

If ENABLE TX  is set - WSPR will TX on all bands selected - in a sequence based on the percentage of TX selected - i.e, not every band is on TX every cycle, just RX.

When TUNE BOX is selected for a band the radio should transmit a short 2-3 seconds TUNE carrier to initiate tuning by an automatic tuner when that band is the band for the sequence  -TX or RX!.  (If autotuning is needed for a TX sequence it is obviously needed if only RX on that band in the sequence.)  The catch is that if a TX cycle is needed the antenna tuner will tune the antenna during the first few seconds of the TX and little is lost in a two-minute TX. (However, I think the system is set up for the short TUNE followed by the full TX even when that band is the band for the sequence.

But if a band sequence is started on a band that is not auto-selected for TX during that sequence few decodes will be made as the antenna has not been tuned.

This leads to the likelihood that in a completely RX only WSPER set up with an antenna that needs tuning on each band - few decodes will ever be made!

So back to my concern that in my case I need that autotuner tweaked any time there is a band change during WSPR operation.

Hope more can read my request and help will a solution.

PS:  If I had a balanced all-band antenna this would not be a problem.  That is far from the case here in my HOA-governed 18-unit Townhome neighborhood!  That said, my  57-ft end-fed wire under the roof overhang at 28 ft agl fed with remote autotuner has been heard in Antarctica and Europe. ( WSJT-x is fantastic!)

Thanks, again
bud N0IA


--
73 Phil GM3ZZA


Don Roden
 

Wouldn;t that wear out a tuner in short order ?
Don W4DNR



Quoting "Philip Rose via groups.io" <pvrose@...>:

Bud, 

I think the problem is how do you auto-tune on a band you are not allowed
to transmit. Auto-tune, by its nature requires you to transmit a few watts,
so that the tuner can adjust its settings. I don't know of any external
tuner that can adjust itself based on received signal strength. Most times
it will require manual adjustment.

73 Phil GM3ZZA

On 19 Nov 2020 20:50, bud Thompson N0IA <budn0ia@...> wrote:

Bill-  Thanks for the response-  I don't think that is the point.

WSPR is RX only on any band that is selected (licensed authorization not
considered.)  It can run just fine w/o any TX ever if wanted, but one or
more bands must be selected.  

The set up is to select the bands wanted -  for what times of day,
etc. 
If a band is not checked it is not included in the scan sequence ever. 
Any band selected may be muted (skipped) at times based on the local
time of day.  So sometimes a band is skipped in the sequence based on
the sun. 

If ENABLE TX  is set - WSPR will TX on all bands selected - in a
sequence based on the percentage of TX selected - i.e, not every band is
on TX every cycle, just RX.

When TUNE BOX is selected for a band the radio should transmit a short
2-3 seconds TUNE carrier to initiate tuning by an automatic tuner when
that band is the band for the sequence  -TX or RX!.  (If autotuning is
needed for a TX sequence it is obviously needed if only RX on that band
in the sequence.)  The catch is that if a TX cycle is needed the antenna
tuner will tune the antenna during the first few seconds of the TX and
little is lost in a two-minute TX. (However, I think the system is set
up for the short TUNE followed by the full TX even when that band is the
band for the sequence.

But if a band sequence is started on a band that is not auto-selected
for TX during that sequence few decodes will be made as the antenna has
not been tuned.

This leads to the likelihood that in a completely RX only WSPER set up
with an antenna that needs tuning on each band - few decodes will ever
be made!

So back to my concern that in my case I need that autotuner tweaked any
time there is a band change during WSPR operation.

Hope more can read my request and help will a solution.

PS:  If I had a balanced all-band antenna this would not be a problem. 
That is far from the case here in my HOA-governed 18-unit Townhome
neighborhood!  That said, my  57-ft end-fed wire under the roof
overhang
at 28 ft agl fed with remote autotuner has been heard in Antarctica and
Europe. ( WSJT-x is fantastic!)

Thanks, again
bud N0IA
--
73 Phil GM3ZZA


mike
 

noise bridge, aka silent tuneing. iirc the FC-757 used a similar method..

On 19 Nov 2020 at 21:04, Philip Rose via groups.io wrote:

I think the problem is how do you auto-tune on a band you are not allowed to
transmit. Auto-tune, by its nature requires you to transmit a few watts, so
that the tuner can adjust its settings. I don't know of any external tuner
that can adjust itself based on received signal strength. Most times it will
require manual adjustment.


73 Phil GM3ZZA


Ken WB8UFC
 

FWIW, the FC-757 manual indicates receive-only tuning is an optional mode that can only be performed manually. 
https://www.manualslib.com/manual/1001225/Yaesu-Fc-757at.html?page=12#manual


bud Thompson N0IA
 

Thanks for your comment.

I doubt that many external auto tuners these days would fail in the early years by being used intermittently for a month or so 24/7 every once in a while.  There are several mechanical relays involved, the rest is electronic components.  It is possible that the manufacturers have data (or educated guesses) on failure rate vs use.  Most mechanical relays have such stats.  Last month one of the first "HD TVs" I'd had for 12 years failed. That TV was on a lot over the years.  There use to be a colloquial saying about these 'modern electronics devices:'  If you turn your TV on and off several times a day it will last about six or seven years.  If you leave it on 24/7 it will last about six or seven years.

In my case, I'm 83 years old - and hope to out live my remote auto tuner.

bud N0IA