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20m+WSPR+Loop Ant+TX without computer

 

Hello there , I am optimizing everything for my condition. I looked at WSPR sites and found most contacts are for 20 meters band. I will build a 20 meters loop antenna for in room use or on balcony use. My computer is not functioning correctly and I will not plug the transmitter into the computer. I will not receive?and I will not report. I learned that WSPR transmission depends on correct timing , does the QRPLABS?transmitter have a clock which I will be able to correct manually . I will TX a few extremely?short times a day.

Best Regards,

Mustafa Umut Sarac
Istanbul
 

I have a QCX +5W and it runs WSPR 24/7

You can set the clock manually after start up and you can afford to gain or lose a second before reception of your signal is a problem. ?Timing is controlled IIRC by the system clock crystal which is low cost and although you can adjust it manually via the menus it will still drift as temperature changes?

if there is a power interruption in WSPR mode it will restart with the clock wrong?

By far a more superior solution is to buy and connect the optional GPS board which will trim the TX frequency every time, calculate your Location code and update the clock between transmissions .
after an unexpected power loss the WSPR transmission will restart and after running wrongly timed once the frequency, timing and location will all be checked/updated?
 

Hi Mustafa

Maybe look at the U3S. That is transmit-only, and with the addition of the QLG2, bullet-proof.

Roger
8P6RX

Get
On 22 Aug 2023, at 13:54, Mustafa Umut Sarac <mustafaumutsarac@...> wrote:

Hello there , I am optimizing everything for my condition. I looked at WSPR sites and found most contacts are for 20 meters band. I will build a 20 meters loop antenna for in room use or on balcony use. My computer is not functioning correctly and I will not plug the transmitter into the computer. I will not receive?and I will not report. I learned that WSPR transmission depends on correct timing , does the QRPLABS?transmitter have a clock which I will be able to correct manually . I will TX a few extremely?short times a day.

Best Regards,

Mustafa Umut Sarac
Istanbul
 

Hello Bruce and all, I think I will spend my last dime on transmitter and antenna and would not afford GPS. Is there any online clock which will transmit the GPS timing free . And I would not want to report to everyone my exact location worldwide. Does 5 watts power wspr 20 mt transmission with my close range loop antenna affect my health ANYWAY ?


_,_
 

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FYI?
I use my cell phone and have no issues!


On Aug 22, 2023, at 1:16 PM, Mustafa Umut Sarac <mustafaumutsarac@...> wrote:

?
Hello Bruce and all, I think I will spend my last dime on transmitter and antenna and would not afford GPS. Is there any online clock which will transmit the GPS timing free . And I would not want to report to everyone my exact location worldwide. Does 5 watts power wspr 20 mt transmission with my close range loop antenna affect my health ANYWAY ?


_,_
 

Here is my take on standalone wspr tx without gps.?

I am using NTP server via wifi connection for time.



73

Barb WB2CBA
 

You can set the clock anytime manually and +/- a second is fine to run for a day.

The location field is an essential part of a WSPR signal? ?No one can plot your station on a map without it so transmitting will be a bit pointless :-)?

The 4 character location derived from the GPS data is not precise at all (google 'maidenhead locator') although you can upload additional information yourself to narrow it down to a smaller non- precise location?

If you sit in front of the loop you may need to so the safety calculations.? However No-one recommends running the QCX at 5W continuous.? I run mine on 9V producing about 3W and at that level and even 50% transmit operation? most EM Field safety calculators will return a 'nothing to see here'? result
 

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I do all my WSPR work at 200mW or less, using SOTABEAMS for the 200mW and the QRP-Labs U4B for 27mW. ?The overall objective of WSPR is that of low power. ?200mW is almost excessive IMHO as some have indicated that that power is equal to about 4w CW. ?5w would then equal about 100w.

The only time the Grid Square will locate you with pinpoint accuracy is the unlikely event where you live in the precise center of a Grid Square.

John
KK4ITX?





?Each mistake is a learning opportunity.?

On Aug 23, 2023, at 3:17 PM, Bruce Akhurst <bruce@...> wrote:

?

You can set the clock anytime manually and +/- a second is fine to run for a day.

The location field is an essential part of a WSPR signal? ?No one can plot your station on a map without it so transmitting will be a bit pointless :-)?

The 4 character location derived from the GPS data is not precise at all (google 'maidenhead locator') although you can upload additional information yourself to narrow it down to a smaller non- precise location?

If you sit in front of the loop you may need to so the safety calculations.? However No-one recommends running the QCX at 5W continuous.? I run mine on 9V producing about 3W and at that level and even 50% transmit operation? most EM Field safety calculators will return a 'nothing to see here'? result
 

Dear Bruce and all , Can I set my location info to U3S manually ?

On Wed, Aug 23, 2023 at 10:17?PM Bruce Akhurst <bruce@...> wrote:

You can set the clock anytime manually and +/- a second is fine to run for a day.

The location field is an essential part of a WSPR signal? ?No one can plot your station on a map without it so transmitting will be a bit pointless :-)?

The 4 character location derived from the GPS data is not precise at all (google 'maidenhead locator') although you can upload additional information yourself to narrow it down to a smaller non- precise location?

If you sit in front of the loop you may need to so the safety calculations.? However No-one recommends running the QCX at 5W continuous.? I run mine on 9V producing about 3W and at that level and even 50% transmit operation? most EM Field safety calculators will return a 'nothing to see here'? result
 


The answer is: yes you can. It is part of the set-up for WSPR on the U3S. To set the clock you will need a clock that shows seconds. It can take a little practice to get close but anything less then 30 sec. should work for a few hours.? As for a loop antenna, OM0EM has a very good qrp multiband (40m-10m) magnetic loop antenna.

Paul
KD9JYV

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