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Old August 15th, 2021, 03:33 AM   #1
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What is the best way to fix this.

Hi, Just noticed this with my radio mic antenna

https://i.ibb.co/C1h03Yy/IMG-3796.jpg

I think I have some of that heat shrink tubing, would that work with effecting the reception.

Thanks in advance
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Old August 15th, 2021, 07:10 AM   #2
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Re: What is the best way to fix this.

Yes, I'm pretty sure the shrink tube will do it. Though I would fill and mould and smooth out some Silastic into those breaks and cracks in the aerial rubber. Then let it dry out over a good 48-72 hours then shrink it. Any RF loss would be pretty minor I would think. We have put heavy thick plastic bags over receivers on the side of footy pitches in the pouring rain and never had an issue.

Chris Young
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Old August 15th, 2021, 07:48 AM   #3
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Re: What is the best way to fix this.

Quote:
Originally Posted by Christopher Young View Post
Yes, I'm pretty sure the shrink tube will do it. Though I would fill and mould and smooth out some Silastic into those breaks and cracks in the aerial rubber. Then let it dry out over a good 48-72 hours then shrink it. Any RF loss would be pretty minor I would think. We have put heavy thick plastic bags over receivers on the side of footy pitches in the pouring rain and never had an issue.

Chris Young
Hello Chris,thanks for the advice, will do.

Thanks.
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Old August 15th, 2021, 10:35 AM   #4
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Re: What is the best way to fix this.

I would concur with Christopher Young. As long as there are not breaks in the inner wire, you should not be any reception loss.
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Old August 15th, 2021, 10:46 AM   #5
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Re: What is the best way to fix this.

There's no issue with performance, but once the plastic starts to stiffen like this, it will keep doing it - so just sleeve from end to end. The only downside is the sleeved antenna is stiffer. Oddly - this can help as it resists being bent at odd angles which impacts reception far more than one ion a straight line!
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Old August 16th, 2021, 01:32 AM   #6
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Re: What is the best way to fix this.

Rick and Paul, thank you both as well, no, no breaks in the inner wire. I just ordered some of the tubing, thanks.
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Old August 16th, 2021, 08:42 AM   #7
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Re: What is the best way to fix this.

Otherwise, Sennheiser replacement antennas, will not break the bank, and is a quick an easy operation if one can solder and have the proper size Torx tool. . As well, a detachable antenna connector can be soldered in. Either way, it is one (1) solder joint.. The secondary antenna (audio output cable shield) can be modified as well to a detachable antenna connector.

Last edited by Rick Reineke; August 17th, 2021 at 08:29 AM.
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Old August 16th, 2021, 10:39 PM   #8
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Re: What is the best way to fix this.

¼ wave wireless antennas are tuned to the frequency bands of the tx and rx in question so you have to make sure that a replacement aerial matches the wireless set's requirement.

Sound Devices quote:

"It is also important to use the proper length ¼ wave antenna for the operating frequency."

or frequencies if it's a multi-band wireless set

More info here from Sound Devices:

https://www.sounddevices.com/picking...ireless-audio/

Chris Young
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Old August 17th, 2021, 12:33 AM   #9
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Re: What is the best way to fix this.

Let’s be honest Chris. If you don’t know that, then you really shouldn’t open up a pack and poke a soldering iron at it!
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Old August 17th, 2021, 04:48 AM   #10
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Re: What is the best way to fix this.

True PJ.

But a few people I mention info like this to raise their eyebrows and go "Really?" So you just don't know who does or who doesn't know these days. Especially through the remote facelessness of the web! Stay well!

Chris Young
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Old August 17th, 2021, 08:10 AM   #11
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Re: What is the best way to fix this.

I had an antenna returned to me today "not working". A week old. Inside it's a black mess! Fried. It's rated at 50W with a peak handling of 150W - apparently it stopped working when connected to a handheld radio. Hmmmmm I don't think so. Trouble is, Ebay will give him a refund - life sucks!
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Old August 17th, 2021, 11:13 AM   #12
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Re: What is the best way to fix this.

So that's from a Sennheiser G3 or similar? You could replace that antenna with one connected via SMA.

Several years ago, Andrew Jones wrote a good (and the first I saw) tutorial on how to do this:
https://wavreport.com/2016/10/27/sen...-g2g3-sma-mod/

And last year Steve Oakley put up a video guide:
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Old August 17th, 2021, 02:11 PM   #13
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Re: What is the best way to fix this.

Thanks guys, great info :). (Typo)

Would this do the job, if i decided to go that road?

https://www.ebay.co.uk/itm/293718813...MAAOSwLHhfUK3s

Thanks all :)

Last edited by Anthony McErlean; August 18th, 2021 at 01:20 AM.
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Old August 17th, 2021, 02:43 PM   #14
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Re: What is the best way to fix this.

The SMA mod will work, not quite as easy as soldering in a Sennheiser replacement, but it works and reception should be about the same.. provided the correct length is used.
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Old August 17th, 2021, 04:26 PM   #15
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Re: What is the best way to fix this.

Fun project if you like DIY. Yeah I'd probably solder the oem antenna to save myself the time. Not sure if it's worth it if the FCC ban the frequencies of these older units.
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