Stop transmitting occasionally...

VK3KYY
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Re: Stop transmitting occasionally...

Post by VK3KYY » Mon Jul 20, 2020 12:34 pm

Black wire may not be GND.

In fact I'm pretty sure its one of the data wires in my USB cable.

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F1RMB
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Re: Stop transmitting occasionally...

Post by F1RMB » Mon Jul 20, 2020 12:52 pm

Hi Luc,
F6GVE wrote:
Mon Jul 20, 2020 12:27 pm
It will be more explicit like that ;)

Image
Okay 😉
73 de Daniel.

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Re: Stop transmitting occasionally...

Post by F6GVE » Mon Jul 20, 2020 12:56 pm

Image

In black the extra connection that caused the trouble

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F1RMB
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Re: Stop transmitting occasionally...

Post by F1RMB » Mon Jul 20, 2020 12:57 pm

Hi Roger,
VK3KYY wrote:
Mon Jul 20, 2020 12:34 pm
Black wire may not be GND.

In fact I'm pretty sure its one of the data wires in my USB cable.
Yeah, the joke of the wires color (mostly never respected).
Thanks to my slight colorblindness problem, I trust my continuity tester instead 😉

Cheers.
---
Daniel
73 de Daniel.

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oe7abh
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Re: Stop transmitting occasionally...

Post by oe7abh » Mon Aug 24, 2020 7:45 am

Hello Roger! Hello Daniel !

I use the hotspot mode with the original Radioddity programming cable (silver colored logo "Radioddity").
The hotspot works with an external antenna UFB !

If I use the original antenna, the transmitter stops after a few seconds !! HF-POWER 50mW !!! :shock:
HF radiation - how can I fix the problem?

Firmware: August 18 2020

73 Alfred OE7ABH
www.Tyrofly.at

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Re: Stop transmitting occasionally...

Post by VK3KYY » Mon Aug 24, 2020 8:05 am

oe7abh wrote:
Mon Aug 24, 2020 7:45 am
Hello Roger! Hello Daniel !

I use the hotspot mode with the original Radioddity programming cable (silver colored logo "Radioddity").
The hotspot works with an external antenna UFB !

If I use the original antenna, the transmitter stops after a few seconds !! HF-POWER 50mW !!! :shock:
HF radiation - how can I fix the problem?

Firmware: August 18 2020

73 Alfred OE7ABH
www.Tyrofly.at

See the various posts on the forum about this problem

Use RF protection on the USB cable, e.g. chokes and possibly also a shielded USB cable

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oe7abh
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Re: Stop transmitting occasionally...

Post by oe7abh » Mon Aug 24, 2020 8:51 am

Hello roger!

Thank you for your prompt reply !
A shielded cable with a ferrite choke brings no improvement.
Maybe you can test it yourself.

73 Alfred

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Re: Stop transmitting occasionally...

Post by VK3KYY » Mon Aug 24, 2020 9:59 am

oe7abh wrote:
Mon Aug 24, 2020 8:51 am
Hello roger!

Thank you for your prompt reply !
A shielded cable with a ferrite choke brings no improvement.
Maybe you can test it yourself.

73 Alfred
The problems are almost always caused by RF injection into the USB or the host computer system.

Many people have the hotspot working 100% of the time. I don't need to retest it.

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F1RMB
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Re: Stop transmitting occasionally...

Post by F1RMB » Mon Aug 24, 2020 10:40 am

Hi,

Once you have the transmission problem, grab your MMDVMHost log file, zip it, and post it here.


Cheers.
---
Daniel
73 de Daniel.

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oe7abh
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Re: Stop transmitting occasionally...

Post by oe7abh » Mon Aug 24, 2020 11:21 am

Hi Daniel,

Please !

73 Alfred OE7ABH
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Pi-Star_gd77-hotspot_MMDVM-2020-08-24.zip
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