• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

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rufust

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Joined
May 10, 2012
Messages
36
Location
Upstate NY
#1
I am looking for suggestions on a way to isolate my radio and scanner antennas.I have to mount them on the same pole but won't use them at the same time.Is the scanner being off good enough or do I have to disconnect it?I don't need to blow the scanner.Is there a manual switch that will isolate it well enough?
Thanks
 
Joined
Aug 17, 2003
Messages
209
Location
Cincinnati, OH
#2
I am looking for suggestions on a way to isolate my radio and scanner antennas.I have to mount them on the same pole but won't use them at the same time.Is the scanner being off good enough or do I have to disconnect it?I don't need to blow the scanner.Is there a manual switch that will isolate it well enough?

Thanks


The scanner being off should be plenty.

If you really want to, they make 3 position switches for antennas, where one position is the ground.

I guess it also depends upon what you are scanning. I use my scanner here on 800MHz while using the radio on 2m & 70cm.
 
Joined
Dec 25, 2008
Messages
3,071
Location
New Zealand
#3
You say "radio" but what radio frequency and how much power? Up to about 25W 2m/70cm I would think would be safe, but anything above that I would start getting cautious. I've popped front end transistors of an ordinary domestic radio with a whip antenna with 100Watts of HF into a trap vertical from about 20feet away.
 
Joined
Oct 25, 2008
Messages
252
Location
Southern California
#4
+1 on fyrfyter33 and majoco's advice.

If you can, put the scanner antenna higher on the pole than the "radio" antenna. Vertical separation is your friend.

To carry the project into the extreme, you could install a carrier operated antenna switch that would bring the scanner antenna feed to ground whenever the "radio" is keyed.
 
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