[chirp_users] 9000D

[Eric Vought]

I do not know how your jurisdiction has things programmed, but here, we
program our public service radios to send tone and receive open. That
practice is also recommended in the NIFOG for the interoperability channels
so that an emergency responder does not potentially miss important traffic
with an incorrect tone. Tone squelch is then enabled selectively when
needed to avoid interference (either by a keypad button or by having
multiple versions of the same channel pre-programmed, one with open-squelch
and one with tone).

So, basically, setting the tone on your end may or may not prevent the
emergency responders from hearing your accidental key-up and the key-up may
still stomp on a transmission either way (which is why
monitor-before-transmit is the rule when using tones). So, I agree with
Gary that mic discipline is going to be the better approach and you may
still find a way to actually disable transmit on your radio (or CHIRP may
eventually solve that problem for you). In practice, the typical e.g. Law
Enforcement has less radio training than you do, and, unfortunately, dead
keying and other problems on their end are not uncommon, so an occasional
mistake likely won't even be noticed :-(

Another possibility is if your radio or mic has a software or mechanical
lock you can enable it while monitoring the PS channels. One of my mics,
for instance, has a switch opposite the PTT which will disable the key pad
and PTT until it is unlocked. I find this useful in a vehicle where bumps
and joggles simply happen during patrols. Keypad locks sometimes lock only
the keypad and not the PTT, so your mileage may vary.

On Sat, Nov 14, 2015 at 10:21 AM, Gary Runningbear <
runningbear2000 at gmail.com> wrote:

> Of the ham club maybe but that would be my limit.
> On Nov 14, 2015 11:20 AM, "dmdfacp at gmail.com" <dmdfacp at gmail.com> wrote:
>
>> Well-stated, Gary. Logical and sensible.
>>
>> Want to run for president ??
>>
>> Dave
>> K1SIW
>>
>> Sent from my iPhone
>> DSP
>>
>> On Nov 14, 2015, at 11:15 AM, Gary Runningbear <runningbear2000 at gmail.com>
>> wrote:
>>
>> Hi Jim, I must say I admire your dedication to protecting the PS
>> frequencies and I think your theory might work but I can't say for sure
>> since I am not familiar with that radio. However, please allow me to say
>> that I think you are overthinking this whole process. Please realize that
>> an accidental key on the PS frequencies would not by any means be
>> considered malicious interference. And since you were intelligent enough to
>> get your ticket in the first place I feel sure that you are intelligent
>> enough to keep track of your mic so that you would not accidentally sit on
>> it like so many police officers do! Lol so after all this I would say
>> program all the PS frequencies you want put the mic in a safe place and
>> enjoy. Have a great day.
>>
>> Gary
>>   N8GPZ
>> On Nov 14, 2015 9:05 AM, "James Jalbert" <kc1ecv at gmail.com> wrote:
>>
>>> I have done a little more playing, and had a thought. I am new to HAM
>>> and still a little gray on somethings, but, if I were to import the PS
>>> freqs and set them in the CSV file to use Tone and set the tone to 254.1,
>>> if my thought is correct, Tone mode will allow open squelch, so I could
>>> still here, but if the mic was keyed it would transmit the 254.1 tone, and
>>> not interfere with the Public Service radios as that would not be a tone
>>> set for them to receive? Am i looking at this correct?
>>>
>>> On Thu, Nov 12, 2015 at 10:15 PM, Kent Garliepp <kent.garliepp at gmail.com
>>> > wrote:
>>>
>>>> Hi,
>>>> On my Baofeng, I choose 'off' under Duplex.
>>>> Kent AF7QO
>>>> On Nov 12, 2015 4:31 PM, "Gary Runningbear" <runningbear2000 at gmail.com>
>>>> wrote:
>>>>
>>>>> To James KC1ECV,
>>>>>   You were right my friend about turning duplex to off to kill the
>>>>> transmit. I guess that particular radio can't be affected by that so now I
>>>>> guess you'll have to set a switch in your own mind do not grab the mic
>>>>> while monitoring those PS channels. Sorry to have misled you but that was a
>>>>> learning point for me and it won't happen again. hi hi
>>>>>
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>>>>
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>>>
>>>
>>>
>>> --
>>> James D. Jalbert
>>> KC1ECV
>>>
>>>
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>
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