# Digirig 891 and ardop
**URL:** https://forum.digirig.net/t/digirig-891-and-ardop/10566
**Category:** Uncategorized
**Tags:** os-windows, mode-winlink, troubleshoot-ptt
**Created:** [June 10, 2026, 6:25pm UTC](https://forum.digirig.net/t/digirig-891-and-ardop/10566 "2026-06-10T18:25:31Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@KR1FLE](https://forum.digirig.net/u/KR1FLE)
#### Post date: [June 10, 2026, 6:25pm UTC](https://forum.digirig.net/t/digirig-891-and-ardop/10566/1 "2026-06-10T18:25:32Z")
I was previously using the older digirig mobile, but moved that to another radio and “upgraded” to the 891 model.
I’ve figured out any digital mode I use, I have to MAKE SURE audio comes out of only one side. Mono, left I think it was. Or else the PTT goes absolutely NUTS. lol.
Attempted to do some ardop winlink this morning for some “winlink Wednesday” and my good ol haywire rapid-fire PTT has returned because ardop doesn’t have a setting to only send audio down one channel that I can find.
Any ideas?
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### Author:  [@K0TX](https://forum.digirig.net/u/K0TX)
#### Post date: [June 10, 2026, 10:03pm UTC](https://forum.digirig.net/t/digirig-891-and-ardop/10566/2 "2026-06-10T22:03:12Z")
You can disable VOX PTT for good by using solder pads on the back on the PCB - just carefully cut the trace connecting the two pads.
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### Author:  [@KR1FLE](https://forum.digirig.net/u/KR1FLE)
#### Post date: [June 10, 2026, 10:38pm UTC](https://forum.digirig.net/t/digirig-891-and-ardop/10566/3 "2026-06-10T22:38:44Z")
Excellent! That’s what I was guessing when I actually read the manual, just wanted to be 100% sure.
I guess the older mobile version didn’t have this extra little feature?
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### Author:  [@K0TX](https://forum.digirig.net/u/K0TX)
#### Post date: [June 11, 2026, 7:31pm UTC](https://forum.digirig.net/t/digirig-891-and-ardop/10566/4 "2026-06-11T19:31:05Z")
Digirig Mobile doesn’t support PTT by VOX. The available PTT methods with Digirig Mobile are PTT by RTS and PTT via CAT.