#1 2016-01-05 00:28:21

YT7FMS
Member
Registered: 2015-12-16
Posts: 6

No decode while on (or next to) AC/DC converter

Hi,

having a (for me, at least) strange issue.
When running my Baofeng UV-B6 on battery power, microAPRS can decode packets.
When running on a car power adapter, connected to a 12V 1.5A AC/DC converter, microAPRS can not decode packets.
Also, if I leave car power adapter pluged in into the AC/DC converter and leave it next to a radio, while radio runs on battery, still no packets are being decoded.
When radio is put in charger, microAPRS decodes fine.

..? (sorry, I don't know what exactly should I ask, I am very new to electronics)

Last edited by YT7FMS (2016-01-05 12:59:26)

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#2 2016-01-07 09:25:20

IW3IJQ
Member
Registered: 2015-07-27
Posts: 13

Re: No decode while on (or next to) AC/DC converter

Hi,

you have to check differences in signal using an oscilloscope. If you haven't one you could use a PC soundcard (see http://makezine.com/projects/sound-card-oscilloscope/).
I think that your AC/DC converter introduces too much noise...

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#3 2016-01-10 15:18:01

YT7FMS
Member
Registered: 2015-12-16
Posts: 6

Re: No decode while on (or next to) AC/DC converter

Thank You for your reply!
I will try to view signal with sound card. I have used xoscope to see changes with RC high pass filter successfully.

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#4 2016-04-24 09:49:43

Stanley
Member
From: Kuala Lumpur, Malaysia
Registered: 2014-12-01
Posts: 65
Website

Re: No decode while on (or next to) AC/DC converter

From my experience of using both through-hole and SMD components, the SMD components seems to give better sensitivity in packet decode .. (probably due to the 1uF input capacitor )

Also comparing different handy, a TYT-VF8 (VHF only) seems to perform better deccoding than a TFT-UVF8 (VHF & UHF ) with everything else remain the same.....


Stanley
9W2SVT/ N5SVT
http://9W2SVT.blogspot.com

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