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Portsdown 4 PTT
Posted: Tue Jan 19, 2021 7:12 pm
by m0pnn
Hi
I've been asked to find out which pin is now used on the Pi 4 for PTT, please.
Cheers
Paul
Re: Portsdown 4 PTT
Posted: Tue Jan 19, 2021 7:25 pm
by G8GKQ
Paul
An easy search of the Wiki brings up this page:
https://wiki.batc.org.uk/Portsdown_4_GPIO_Connections
Pin 40. No change from the Portsdown 2020.
Dave
Portsdown 4 PTT
Posted: Tue Jan 19, 2021 7:32 pm
by m0pnn
Hi
Dave
Thanks for your reply he can see no voltage on pin 40.
Cheers
Paul
Re: Portsdown 4 PTT
Posted: Wed Jan 20, 2021 11:35 am
by M5TXJ
Hi Paul,
How long is the OM waiting after selecting TX? Is he aware of the 12 second delay in going to TX to avoid spurious emissions?
73 Dave.
Re: Portsdown 4 PTT
Posted: Wed Jan 20, 2021 4:11 pm
by m0pnn
Hi
Dave
Thanks for the reply.
I have done some reading and did notice that
. I am not sure what build he is running and with everything that's going on at the moment. It's not making it easy doing it over the air or by phone. There is three of them building Portsdown 4 sharing info sure they will get there.
Cheers
Paul