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Forum: Marine Electronics

11-01-2014, 11:29

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

This is an interesting idea, so I did some math. I don't think this will work:

A modern high-efficiency LED anchor or tricolor light draws about 0.1A @ 12V.
To power this for 12 hours would...

Forum: Marine Electronics

27-12-2013, 16:57

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

I would think that a gimbal mount would be good, since it should keep the antenna level too (make sure that the added weight doesn't upset the balance). You probably aren't going to use a high-gain...

Forum: Marine Electronics

27-12-2013, 10:36

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

rgleason, I don't think there is a single "preferred" way to mount the AIS antenna. Generally, higher is better, although with a stern-rail mount you will still probably get reasonable AIS reception...

Forum: Marine Electronics

26-12-2013, 22:07

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Thanks Matt,

As you have probably seen, I have PM'd you with a request for clarification (from Optolamp). Their answer is good, and yours is great, but there are to my mind unanswered questions. ...

Forum: Marine Electronics

24-12-2013, 19:54

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

I searched that, and while there were some mentions of testing and "no noise detected", I can't tell how these test were done. Not to discount these tests (well I guess I am doing just that), unless...

Forum: Marine Electronics

24-12-2013, 17:38

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Evans, who besides myself has done these noise analyzer measurements? (this thread or elsewhere?) I just scanned this thread from the beginning and didn't see anyone using test equipment, or...

Forum: Marine Electronics

24-12-2013, 17:11

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

You're right about this. Casual testing is just that, and if one person's VHF antenna is a few inches closer/farther/higher/lower, that person's "OK" is another's "Fail".

I used to do this kind...

Forum: Marine Electronics

24-12-2013, 11:50

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

100%? Of course not. To give you that I would want to use a calibrated antenna / preamp / etc, so I could compare the measurements to the receiver sensitivity. Even then, my personal analytic...

Forum: Marine Electronics

24-12-2013, 09:55

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

The Optolamp "Amazonia" tri/anchor/strobe has caused no interference to my VHF or SSB radios (I discussed my measurements a few posts previously). Apparently the Lopolight is also quiet. So not all...

Forum: Marine Electronics

15-12-2013, 18:42

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Today I connected the spectrum analyzer to the masthead VHF antenna, and I could not measure *any* VHF interference. I looked at the entire marine VHF band, and for greater sensitivity did a...

Forum: Marine Electronics

13-12-2013, 18:40

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Be aware that the tri/anchor/strobe functions are controlled by three wires. The tri/anchor mode depends on the 12V/Ground polarity on one wire pair, and the strobe runs when the third wire is...

Forum: Marine Electronics

12-12-2013, 17:24

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Remember that we are also discussing masthead tricolor lights. Yes, I know we could use deck-level lights, but I want my tricolor.

I have an Optolamp "Amazonia" tricolor, with an adjacant VHF...

Forum: Marine Electronics

11-12-2013, 21:54

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

Here are some EMI tests done by OGM, showing improvements to the emissions from one of their LED navlights:
https://www.cruisersforum.com/forums/attachment.php?attachmentid=71964&stc=1&d=1386826510
...

Forum: Marine Electronics

10-12-2013, 08:41

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

I know this is old information, but it's also a crap excuse. Some radios may (perhaps) be more susceptable to certain out of band noise, but this really isn't a radio problem.

Forum: Marine Electronics

10-12-2013, 08:36

Replies: 97

LED Noise?

Views: 18,635

Posted By Paul Elliott

Re: LED Noise?

zboss, I don't know if there is a reasonable solution, but I will be interested to see if other folks are having RFI issues with their OGM lights. How close is your antenna to the OGM light? Both...

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