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| Electrical supression on XB12? https://www.ukbeg.com/forum/viewtopic.php?f=7&t=7043 |
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| Author: | Anvil [ 12 Jun 2010 11:06 ] |
| Post subject: | Electrical supression on XB12? |
Dear All, been a while since I've been on the forum, so I hope everyone is doing well? Hi to all that know me! I have an Autocom super pro avi Intercomm on my XB12R. I am very pleased indeed with its performance. However, I have a new SAT-NAV system, a snooper syrius with a headphone socket that I plug into my autocom. The unit works extremely well when running off its own battery, but the moment I connect the syrius to on-board power from an accessory socket, I get a lot of buzzing and engine speed related interference. I'm suspecting that I may need to fit some sort of electrical supression, but have no idea how this would be done. I seem to remember capacitors or similar being fitted to cars years ago to stop the radio buzzing. I'm confident this is not an issue with the syrius, as I use the same power supply and connect the output via my car stereo with no adverse effects. Does anyone have any advice please? Many thanks in advance, Si. |
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| Author: | pash [ 12 Jun 2010 11:53 ] |
| Post subject: | Re: Electrical supression on XB12? |
Look for a different source. Which one are you using? Try the output from the Data Link (ECMSpy) connector. I would have to check, but the output may be directly from the ECM and I would think some smoothing would have been applied to the output... I am no electronics king, but if this didn't work, I would stick it through a 7812 voltage regulator. On the data sheets for these things you will find schematics showing the capacitors needed for transient suppression. Part number QL32K at Maplins would do the trick... |
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| Author: | gunter [ 12 Jun 2010 14:00 ] |
| Post subject: | Re: Electrical supression on XB12? |
If I do remember correctly, suppression capacitors were used in ancient times for car radios to get rid of such kind of noise. Maybe asking for that at a car hifi shop or a Bosch store could help you further. A 7812 voltage regulator requires at least 14.5 Volts to work properly, I don't think that this voltage is available all the time. |
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| Author: | Anvil [ 13 Jun 2010 22:19 ] |
| Post subject: | Re: Electrical supression on XB12? |
Thanks very much for the advice guys. Got an in line supressor from the local motabits place and also a ferrite ring from maplins for the audio out cable. Sound quality is the best it's ever been! Nice one! Si. |
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