[chirp_users] UV-82 "Privacy coding (tones)"

Steve G pacbell.pctek at gmail.com
Tue Apr 21 17:32:41 PDT 2015


I remember Motorola labeling the switch "PL" for Private Line on the HT220's.  I don't remember them saying that nobody else could hear your transmission.  Back then, Motorola used Voice Inversion for scrambling, that’s as much privacy as you could get.  Now we have digital.  That stops scanners dead.

I am also upset that FRS & GMRS radio manufactures actually market their radios as having "50 channels", when there are only 14 FRS & 7 maybe 8 GMRS channels.  What they do for the "other channels" is add CTCSS or DCS tones to make them appear to be its own channel.  Very bad on the part of the manufactures!

So, unless you're using a digital system or a system with encryption, there is no "secure/private" communications in the analog world.

-----Original Message-----
From: chirp_users-bounces at intrepid.danplanet.com [mailto:chirp_users-bounces at intrepid.danplanet.com] On Behalf Of Dennis Smith
Sent: Tuesday, April 21, 2015 14:20
To: Discussion of CHIRP
Subject: Re: [chirp_users] UV-82 "Privacy coding (tones)"

Jim, I'm sure you will agree with me that the marketing department in Motorola (who (if I'm not mistaken) first called them "Privacy Tones") must have known that they were blatantly misleading people, where as most other companies call them by the anachronism CTCSS correctly.
This explains CTCSS for the lay-user quite well.
https://www.youtube.com/watch?v=Zht-Y_QsZ2I

Dennis Smith
M1DLG

On 21 April 2015 at 21:26, Jim McCorison <jimmcc at mccorison.com> wrote:
> If I understand what you are describing and what you are asking, you are misunderstanding what tones do. The purpose of tones is not to create privacy, but to allow a radio to ignore transmissions that are not meant for it. When you set a receive tone the radio will remain silent unless a transmitting radio sends that tone. With no tone set a receiving radio will receive all transmissions on its set frequency regardless of whatever tones may be transmitted.
>
> Cheers,
> Jim
>
> Jim McCorison
> Orcas Island, WA
>
>> On Apr 21, 2015, at 1:17 AM, Justin <700hpvette1 at cox.net> wrote:
>>
>> So I tried to setup a UHF simplex channel with CTCSS/DCS on one of my UV-82’s (well frankly any “privacy” type code/tone). No matter what combination I tried, my BF8-HP (listening to the same frequency but no codes programmed) picked up every transmission. Also, the UV-82 would receive anything I sent with the BF8. The most I could accomplish was the the UV-82 would receive only the carrier and wouldn’t produce any of the audio. Downloading the daily build changed nothing and I even copied the settings from a working repeater channel and just removed the offset and still nothing. Is there a bug? Am I an idiot? I was able to program all my repeaters just fine and the tones are obviously working or the repeaters wouldn’t! Does the software ignore tone settings if there is no repeater offsets? Im doubtful as the LCD displayed the changes? Surely someone besides me wants some simplex “privacy”?
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