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locked WSPR output power at <0 dBm #WSPR
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I have had many hours of fun over the past few years, transmitting very weak WSPR signals at <0 dBm (1 milliwatt) output power. My most recent "experiments" were at a level close to -20 dBm, aka 10 microwatts. Still spotted a few hundred miles away by a few stations. I do wish there were a way to advertise power levels lower than 0 dBm, the lower limit in the current WSPR protocol. I assume the protocol can't easily modified to do that without breaking the decoding ability.
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Alan G4ZFQ
On 20/10/2021 00:37, Bruce KX4AZ wrote:
I do wish there were a way to /advertise/ power levels /lower than 0 dBm/,Bruce, The only way I know is wsprnet. In your profile or "Chat". But unfortunately I do not think it is used by many. I assume the protocol can't easily modified to do that without breaking the decoding ability.I also would like lower powers to be accommodated but I guess the protocol can not be altered without a complete worldwide update of WSPR:-) 73 Alan G4ZFQ
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Bobby Chandler
Bruce,
I find the power slider to be fairly accurate, if not near the top. If you set up for a 0dB signal, and follow the slider to drop, say 10dB, it is pretty accurate. Bobby/N4AU -- n4au@... n4au@...
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On 20/10/2021 12:12, Bobby Chandler wrote:
Bruce,Hi Bobby, you have misunderstood the query, the WSPR beacon message format includes the transmitter power in dBm. 73 Bill G4WJS.
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Dave Garber
Bill, is that selectable by the usse in the drop down menu ( right in main screen) Dave Garber VE3WEJ / VE3IE
On Wed, Oct 20, 2021 at 7:14 AM Bill Somerville <g4wjs@...> wrote: On 20/10/2021 12:12, Bobby Chandler wrote:
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Bobby Chandler
OK Bill,
I guess I need to read more closely. HI!! Thanks, Bobby -- n4au@... n4au@...
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Dave Garber
Isn't 0dbm about 1 mw. how much lower do you want to go... Dave Garber VE3WEJ / VE3IE
On Wed, Oct 20, 2021 at 6:10 AM Alan G4ZFQ <alan4alan@...> wrote: On 20/10/2021 00:37, Bruce KX4AZ wrote:
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Dave smith
Surly we then go down to - ( minus ) dBm…….so -3dBm is half a milliWatt. (er.. I seem to remember.😊)
On Thu, 21 Oct 2021 at 17:12, Dave Garber <ve3wej@...> wrote:
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Alan G4ZFQ
Isn't 0dbm about 1 mw. how much lower do you want to go...Dave, 300uW got me over 1000Km without really trying, I'm sure that's not exceptional. 73 Alan G4ZFQ
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