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TOPIC: No Transmit on 40 metres

No Transmit on 40 metres 10 Jan 2022 17:56 #1

I posted a little while ago but I'm unsure where m post went so this may be a duplicate?

I have recently bought an MB1 from a friend and cannot get it to transmit on 40 meters, It will work and transmit everywhere else (I can't test 6/vhf) but 160 to 10 is fine other than 40.

Using mic 2 and 20db of gain and it shows voice but no power

If a duplicate I apologise

Adrian
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No Transmit on 40 metres 11 Jan 2022 08:07 #2

  • Tom_G0JSV
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Which version of the software are you using. If v2 check the Ant and RX Ant dropdowns top left to ensure that the band isn't set-up as RX only. Ensure that a real antenna is being used A2/A3 and not the ADC. Then Option > Expert tab and check power correction for 40M. Ensure drive (top right slider) is not zero. Does 'Tune' work on the band? Ensure 'Tune' slider is not zero. Any signal when using AM/FM?
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No Transmit on 40 metres 11 Jan 2022 09:32 #3

Hi there thank you for replying, installed is SDR2 1.3.1 update 9 MB1, I have checked checked and checked again and its so frustrating, It is all set to antenna 1 for tx and rx, it has a resonant EFHW antenna on 40 meters, it will transmit on every band 160 meters through to 6 meters full power, it will just not transmit on 40, the meter does not even blink or move even a fraction, I have a yaesu M-100 mic plugged in to mic 2 and the mic gain is also set to 20db I have checked in the setting and they are all set to 100 apart from VHF which is set to 50. when I press tune there is also no carrier, I have checked drive in all modes including fm.

Thanks Again Adrian :)
Last Edit: 11 Jan 2022 09:33 by 2E0ERO.
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No Transmit on 40 metres 11 Jan 2022 09:37 #4

2E0ERO wrote:
Hi there thank you for replying, installed is SDR2 1.3.1 update 9 MB1, I have checked checked and checked again and its so frustrating, It is all set to antenna 1 for tx and rx, it has a resonant EFHW antenna on 40 meters, it will transmit on every band 160 meters through to 6 meters full power, it will just not transmit on 40, the meter does not even blink or move even a fraction, I have a yaesu M-100 mic plugged in to mic 2 and the mic gain is also set to 20db I have checked in the setting and they are all set to 100 apart from VHF which is set to 50. when I press tune there is also no carrier, I have checked drive in all modes including fm.

Thanks Again Adrian :)

I wonder if I rolled back to an earlier software maybe that would work? A bug maybe I don't have any historical software to try unfortunately :(

Again regards Adrian,
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No Transmit on 40 metres 11 Jan 2022 18:45 #5

  • N8SDR
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What version of Firmware are you using?
and isnt the most current version of 1.3.1 Update 11?
and that uses Firmware version 13
73 Rick
Last Edit: 11 Jan 2022 18:50 by N8SDR.
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No Transmit on 40 metres 11 Jan 2022 18:56 #6

  • sm4ive
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MB1 with EESDR V2 are Update 9 the latest
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No Transmit on 40 metres 11 Jan 2022 19:03 #7

  • N8SDR
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sm4ive wrote:
MB1 with EESDR V2 are Update 9 the latest

Gottcha thanks, is the current firmware 13 though?
73 Rick
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No Transmit on 40 metres 11 Jan 2022 19:11 #8

  • sm4ive
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I have some of the versions before update 9 if you need.
I am running 1.3.1 update 8 since update 9 killed the possibility to remote cw.
Just let me know and i can transfer aupdate 8 to you
/Lars SM4IVE
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No Transmit on 40 metres 11 Jan 2022 19:17 #9

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Fw 59.8 on update 8
Last Edit: 11 Jan 2022 19:18 by sm4ive.
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