Unable to squelch out background noise above 200'

Radios, intercoms, headsets and GPS systems
Post Reply
User avatar
ANHarder
Posts: 25
Joined: Fri Dec 05, 2008 14:48
Contact:

Unable to squelch out background noise above 200'

Post by ANHarder » Fri Apr 24, 2015 07:43

Last year a friend loaned me a SkyRanger for a few months and I flew it using my Vertex VXA-300 for comm. It did beautifully on ground, but above 100 or 200' the squelch opened and I had a full-volume mixture of hiss, ATIS, local radio stations, etc. Tower transmissions would suppress that noise, but between transmissions it'd drive ya' nuts. He had the same problem with one of his HT's but not the other.

We figured it was something in the SkyRanger causing the problem.

Last weekend the KY-197a in my Chief stopped working and I switched to the Vertex--same problem! Great on the ground, squelch breaks about 200' and stays open. Now I figure it's gotta be the front end on the HT at fault.

Soooo--Anyone else notice this? And are there any HT brands that reject off-frequency noise better than others?

Thanks
Alan Harder
Terre Haute IN

bob turner
Posts: 137
Joined: Sat Oct 22, 2011 23:09
Contact:

Re: Unable to squelch out background noise above 200'

Post by bob turner » Fri Apr 24, 2015 21:44

What is an HT?

There are two things to squelch - if it is the radio, we have found that the Icom A-20 and A-21 are better than almost anything else, but they require special PTT circuitry.

If it is the intercom, often you have to match microphone gain - usually there is a screwdriver adjustment on your headset mike.

User avatar
hangerash
Posts: 594
Joined: Fri Nov 02, 2012 06:12
Location: Montezuma, OH (CQA)
Contact:

Re: Unable to squelch out background noise above 200'

Post by hangerash » Sat Apr 25, 2015 08:03

The obvious question I presume you have done, did you adjust the squelch again after you got above 200 ft?

Radio 101, the higher the antenna the better the reception. That means all the weak signals that were not present below the horizon are now fighting at your new antenna height.
Richard

Post Reply