[arm-allstar] disable COS when keyed toward node

[Kevin Custer]

Patrick,

The device will accept and process all signals properly - with any 
capable Mini-DIN-6 equipped radio and radio interface.  I plan to use 
one of the printed circuit boards from our DRA-3M Mixer 
<http://www.masterscommunications.com/products/radio-adapter/dra/dra-3m-mixer.html>, 
and custom wire the Mini-DIN-6 connectors on the back.  I'll do this by 
adding the circuitry necessary to take the PTT signal and use it to 
disable the COS logic when PTT is asserted.

The disable function will be done by "replacing" the COS logic signal 
with a "ground" or "open" under the asserted PTT condition.  Which one 
of these you need is determined by your radio and what logic level it 
provides when COS is asserted - (when the radio becomes unsquelched).  
Most radios provide a logic low when the radio is unsquelched.  It won't 
matter which logic polarity you need, because I'll add (some number of) 
mechanical headers/jumpers to accommodate either COS polarity - (no 
soldering required).   This way - no matter how your "cosfrom=" is 
currently configured in HamVoIP, it will work correctly by matching the 
COS polarity of your radio.

I'll package the board into the products' metal case and include the 
wall-wart power supply and a short Mini-DIN-6 cable to make the 
connection between it and your radio.  DINAH will plug directly into 
it.  With the exception of possibly needing to move the COS polarity 
jumper(s), the installation should be plug-n-play.  I know you're blind 
- but if you have a color preference for the metal case, just let me 
know.  I have blue or black available.  This way - it'll be a well 
protected project that looks good - not just something thrown together 
hanging out in mid air.

Kevin


On 9/29/2023 2:45 PM, Dustin Perdue wrote:
> Yes. It is a mini DIN, and I am definitely interested.
> I'm currently using a DINAH with a cable that has pins 4 and 5 reversed so as to tap the 9600 output, as it sounds better than the  1200 even with a HPF..Sent from my zippo
>
>
>> On Sep 29, 2023, at 14:11, Kevin Custer<kevin at kc-wireless.com>  wrote:
>>
>> Patrick,
>>
>> If it's going to be a while before David implements the software fix - there is - perhaps, a hardware way to accomplish this. Since logic is being created to make the radio go into transmit - that logic could be used to disable the COS line during that time.
>>
>> If this radio has a Mini-DIN-6 connector - I'd be willing to modify one of my circuit boards (intended for a different application) to accomplish the task.  I think it would be rather easy to do.
>>
>> Please advise if the connector on this radio is a Mini-DIN-6 and reply back - if interested.
>>
>> Kevin W3KKC
>>
>>
>>> On 9/29/2023 1:19 PM, David McGough via ARM-allstar wrote:
>>> Patrick,
>>>
>>> I'll put a software switch in for this in the next update.
>>>
>>>
>>> 73, David K4FXC
>>>
>>>
>>>> On Mon, 25 Sep 2023, Patrick Perdue via ARM-allstar wrote:
>>>>
>>>> Greetings:
>>>>
>>>> I have a Kenwood TM-V700A that I'm using as a remote base, sometimes a
>>>> regular simplex node.
>>>>
>>>> When using it as a remote base, with linktolink enabled, this radio
>>>> always sends COS even when it is transmitting, and there is no way to
>>>> change this behavior in software as there is with the TM-V71A.
>>>>
>>>> So I'm trying to figure out if there's a way, perhaps with events, to
>>>> temporarily disable simpleusb's ability to receive from the radio only
>>>> while traffic is coming into the network-side of the node, then resume
>>>> normal operation when it drops.
>>>>
>>>> Or, is there a better way to think about this problem?
>>>>
>>>> I could just not use linktolink, but repeaters have long handtimes, and
>>>> full duplex nodes are great.
>>>>
>>>>
>>>> Thanks and 73
>>>>
>>>> N2DYI