No antenna, S5 signal on 10mhz. Is this the GPSDO?

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  • Updated 5 years ago
I am unsure if this was reported already. I power cycled the radio and even attempted doing it when the radio was freshly powered up after removing the power so that the GPS was flashing amber. It still had the carrier.

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K6OZY, Elmer

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Posted 5 years ago

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K2CM

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This is an internal 10MHZ. signal generated within the F6.7K. When connecting the antenna, the internal signal drowns out WWV, so I cannot use WWV at 10MHZ for calibration. I checked this with my GPS off, no antenna connected to the GPS. (Will get the GPS antenna up when I get a longer cable.)

I am not sure what the calibration procedure is with no GPS when you can't copy WWV.

Version 0.13.10
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Dave - WB5NHL

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Probably WWV I disconnected the antenna totally and also connected a dummy load. At times I could see the WWV carrier at S4-5 but the modulation was in the noise and unreadable though I could see the modulation spikes if I looked carefully. Other times I could just barely copy WWV with only a short unterminated coax. It's nice having a really great receiver.
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Dave - WB5NHL

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Very interesting. On my 6500 with a GPSDO I have no problem copying WWV at 10 Mhz with antenna. Without antenna I can still just barely hear it about half the time. Located in SC.
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K6OZY, Elmer

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Anyone from Flex able to comment on this?
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Gerald - K5SDR, Employee

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I have not seen a problem with receiving WWV at 10 MHz in Austin.
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K6OZY, Elmer

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This is not an issue with receiving WWV with an antenna attached.. My question is about why I am receiving an S5 carrier on 10mhz without any antenna attached. I don't see how that is WWV, as none of my other radios behave this way (Flex 3000, Flex 1500, Elecraft KX3).