[arm-allstar] My Node is auto kerchunking

[Joe Puma]

This can happen if your cos is using high to trigger and no signal is a 0v but it’s a floating ground. Or something like that. I’ve read some folks using a resistor to keep it pinned to ground when there’s no signal?

Joe
Kd2nfc 


Sent from my iPhone

> On May 26, 2018, at 10:11 PM, Doug Crompton via arm-allstar <arm-allstar at hamvoip.org> wrote:
> 
> Go into simpleusb-tune-menu. Select V - there will be lines at the boot
> displaying COS input and COS composite. If that is showing KEYED when you
> hear the keyup then the actual signal coming in on the COS line is
> triggering the event. Perhaps there is a problem with the incoming COS
> line.
> 
> Are you using usb or usbinvert in item J of simpleusb-tune-menu?
> 
> Perhaps the COS signal from your repeater controller is not going low of
> high enough. If you are using usbinvert it must go low on signal and should
> go down to very close to zero volts and above 2.5 volts with no signal. If
> you are using usb then just the opposite.
> 
> Something is apparently triggering that line or it is sitting on the hairy
> edge of transition.
> 
> 
> *73 Doug*
> 
> *WA3DSP*
> 
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> 
> 
> On Sat, May 26, 2018 at 8:58 PM, "Rory Bowers via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
> 
>> I don't believe this is the case Doug.  The node is connected to a Repeater
>> Controller port.  The radio is a 100 Watt G.E. MASTR II Repeater Station.
>> The repeater can be sitting with no traffic and suddenly the COS on the
>> Node will kerchunk.  I am wondering if anyone else has experienced this.
>> Thanks for the reply!
>> 
>> Rory, K5CKS
>> 
>> On Sat, May 26, 2018 at 7:49 PM, "Doug Crompton via arm-allstar" <
>> arm-allstar at hamvoip.org> wrote:
>> 
>>> It is more than likely RF feedback. If you are using a Baofeng 888 you
>> need
>>> to get the antenna away from the radio - coax to an antenna 5-10 feet
>> away.
>>> The other option if it is a local node is to put it on a dummy load. 2 -
>> 1
>>> Watt 100 ohm carbon resistors would work fine.
>>> 
>>> In severe cases there is an rxondelay in simpleusb-tune-menu that delays
>>> COS. By default it is 0. Each value up is an additional 20ms delay. This
>> is
>>> a realtime adjustment so you can raise it one value at a time to see it
>> it
>>> helps but best to eliminate the feedback problem.
>>> 
>>> 
>>> *73 Doug*
>>> 
>>> *WA3DSP*
>>> 
>>> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>>> 
>>> 
>>> On Sat, May 26, 2018 at 5:41 PM, "Rory Bowers via arm-allstar" <
>>> arm-allstar at hamvoip.org> wrote:
>>> 
>>>> I have not been able to figure this one out.  My node is "auto
>>>> kerchunking".  I turned the IDer off and set the ID time interval to 0.
>>>> With no connections it still kerchunks itself.  I have not determined
>> the
>>>> time interval yet.  Any ideas?
>>>> 
>>>> Rory, K5CKS
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