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Author Topic: PTT timeout?  (Read 4843 times)
NZ5E
Member

Posts: 75




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« on: August 16, 2010, 06:06:05 AM »

For those with internet remote stations, are you implementing some type of PTT timeout for when you lose internet connectivity while the station is transmitting?
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K3SF
Member

Posts: 51




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« Reply #1 on: August 23, 2010, 09:29:38 AM »

yes...

i use FT-857 for my remote station...( macbook  pro running VMware fusion with XP, hamradio deluxe for rig control, Teamviewer for remote computer access, skype for audio)

the radio has builtin feature for Transmit timeOut Timer (TOT)...
i have it set for 1 minute.

works in all modes too

and
 if the ptt is still keyed the rigs stays off till ptt is reset

keeps rig safe and keeps qrm off the bands


paul K3SF
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AA4PB
Member

Posts: 12672




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« Reply #2 on: August 23, 2010, 05:32:58 PM »

Back in the packet radio hayday many TNCs had a PTT timeout for the same reason. Once we had someone keyed 4/7 on a network node input for several days (no timer). I finally tracked it down with a mobile DF system to a house about 20 miles away. The guy was out of town on a business trip but I got his wife to pull the plug and take it off the air.

Bottom line is that I'd never operate an automatic or semi-automatic station without a PTT timer. In many cases you'll wind up "smoking" the transmitter and maybe the power supply.

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K0IZ
Member

Posts: 737




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« Reply #3 on: August 26, 2010, 05:27:39 PM »

TRX Manager has a PTT timer built in.
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AA4PB
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Posts: 12672




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« Reply #4 on: August 26, 2010, 07:48:56 PM »

I wouldn't trust a software timer running on a PC for protection of an unattended station.
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