[arm-allstar] radioless node dtmf

[Mike - W5JR]

Another “onesey” option is Joe’s units from Pipo. Not sure how much longer he’ll be making these. I’ve used various units over the past 40 years. It’s how I got 16 button DTMF on my Motorola’s from HT-220’s to MTS2000. Disclaimer, I have no connection to the company. 

pipo.net

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tnx
Mike / W5JR
Alpharetta GA


> On Mar 6, 2019, at 12:23 AM, Jay Urish via ARM-allstar <arm-allstar at hamvoip.org> wrote:
> 
> Doug,
> 
> You are absolutely correct. My attitude is that everything from China is pure junk.
> 
> Maybe the real ones would be an option though.
> 
> 
>> On 3/5/19 11:18 PM, "Doug Crompton via ARM-allstar" wrote:
>> Jay,
>> 
>>   That's a good price but I would be leery of anything taged Motorola for
>> this price. It is probably a clone and there is a lot of junk out there. It
>> turns out using the Arduino in conjunction with the Yaesu mic's has a lot
>> of advantages like being able to monitor your DTMF and also having four
>> additional special function keys. It is actually a 4X5 matrix.
>> 
>> 
>> *73 Doug*
>> 
>> *WA3DSP*
>> 
>> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>> 
>> 
>> On Wed, Mar 6, 2019 at 12:10 AM "Jay Urish via ARM-allstar" <
>> arm-allstar at hamvoip.org> wrote:
>> 
>>> Doug,
>>> 
>>> Have you ever looked at the motorola mics? They do encode DTMF.
>>> 
>>> 
>>> https://www.ebay.com/itm/Microphone-AARMN4026B-DTMF-for-Motorola-Radio-CDM1250-CDM1550-CDM1550LS-CDM750/292196846880?hash=item44084a0d20:g:8wsAAOSwdOlcXY~L
>>> 
>>> 
>>> 
>>>> On 3/5/19 8:55 PM, "Doug Crompton via ARM-allstar" wrote:
>>>> We are about to release our complete radio-less node and in a production
>>>> setting finding an inexpensive  DTMF mic that has real DTMF out and works
>>>> well is almost impossible. The clones are often junk. We started off with
>>>> Alinco mics and the ones offered on the Internet are Chinese clones and
>>>> unreliable using DTMF. We ended up using a Yaesu mic and an Arduino to
>>>> decode the voltage matrix from the mic and create DTMF tones. It works
>>> very
>>>> well but is not something the average user would want to do.
>>>> 
>>>> If you are building your own on a "onesey" basis you should be able to
>>> find
>>>> a mic - Kenwood, Alinco, etc. that works. For a powered mic you need 5V
>>> to
>>>> the mic.  I know some say 8V but all you need is 5V and that is all you
>>> are
>>>> going to get over USB anyway. See the pin out for your particular mic.
>>> Keep
>>>> in mind that many mics do NOT encode DTMF.  Yaesu and icom especially.
>>> They
>>>> either send voltage levels or a data stream to the radio and the DTMF is
>>>> created there. So not all mics will work for the DTMF audio directly out
>>>> which you need. Levels are very important for DTMF. Go into the Asterisk
>>>> client and observe the keys being decoded as you push them. They
>>> obviously
>>>> should all work. In some cases you may need to open the mic and set the
>>>> DTMF level internally if there is a pot to do that.
>>>> 
>>>> 
>>>> *73 Doug*
>>>> 
>>>> *WA3DSP*
>>>> 
>>>> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>>>> 
>>>> 
>>>> On Tue, Mar 5, 2019 at 3:00 PM "Alan Matthews via ARM-allstar" <
>>>> arm-allstar at hamvoip.org> wrote:
>>>> 
>>>>> hi group
>>>>> 
>>>>> a bit of a dumb question, but I'll ask anyway.
>>>>> 
>>>>> I have just finished a radioless allstar node, is there anyway to use
>>> DTMF
>>>>> tones for linking. I'm using my icom mike from my 5100. The only way of
>>>>> connecting as far as I can tell is via allmon.
>>>>> 
>>>>> thanks Alan
>>>>> 
>>>>> 
>>>>> 
>>>>> ---
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>>> 
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>> 
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> _______________________________________________
> 
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