Re: [Hackrf-dev] Still hoping for PTT

[Chuck McManis]

FWIW the idiomatic way to achieve this as far as I can tell is to send a
bias-T signal on the RF cable, basically its a DC offset on the cable which
the PA picks up and switches on. This lets you have short cables between
the PA and the antenna and its only one line to hook up (the antenna coax)

On Tue, Jun 19, 2018 at 5:04 PM Gavin Jacobs 
wrote:

> Bernie
> That’s a great idea! I looked on the hackrf schematic and the signal for
> the TX LED is brought out to a (DNP) header - all I have todo is bring that
> signal out to my PTT circuit. Thanks for the suggestion!
>
> Jake
>
>
> On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
> wrote:
>
> I admit I have not tried this but what about using the TX LED to drive an
> optocoupler to switch the amp?
>
> Bernie
>
>
>
> On 11 Jun 2018, at 00:53, CJ Hicks 
> wrote:
>
> Why not leave your exciter on and only PTT your power amplifier (PA)?  Or
> use an RF to shunt your exciter signal into a dummy load.  Just a couple of
> random thoughts.
>
> CJH
>
> *From:* HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com
> ] *On Behalf Of *Gavin Jacobs
> *Sent:* Saturday, June 09, 2018 5:57 PM
> *To:* hackrf-dev@greatscottgadgets.com
> *Subject:* [Hackrf-dev] Still hoping for PTT
>
> Has there been any progress on implementing digital i/o from/to the hackrf
> One. I'm hoping that someday the hackrf can supply a PTT signal to an
> external amplifier.
>
> Jake
>
> ___
> HackRF-dev mailing list
> HackRF-dev@greatscottgadgets.com
> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>
>
> ___
> HackRF-dev mailing list
> HackRF-dev@greatscottgadgets.com
> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>
___
HackRF-dev mailing list
HackRF-dev@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev

Re: [Hackrf-dev] Still hoping for PTT

[Gavin Jacobs]

Bernie
That’s a great idea! I looked on the hackrf schematic and the signal for the TX 
LED is brought out to a (DNP) header - all I have todo is bring that signal out 
to my PTT circuit. Thanks for the suggestion!

Jake


On Jun 15, 2018, at 5:32 AM, Bernard Kobier 
mailto:bernardkob...@tpg.com.au>> wrote:

I admit I have not tried this but what about using the TX LED to drive an 
optocoupler to switch the amp?

Bernie



On 11 Jun 2018, at 00:53, CJ Hicks 
mailto:cjhi...@dadelus-engineering.com>> wrote:

Why not leave your exciter on and only PTT your power amplifier (PA)?  Or use 
an RF to shunt your exciter signal into a dummy load.  Just a couple of random 
thoughts.

CJH

From: HackRF-dev [mailto:hackrf-dev-boun...@greatscottgadgets.com] On Behalf Of 
Gavin Jacobs
Sent: Saturday, June 09, 2018 5:57 PM
To: hackrf-dev@greatscottgadgets.com
Subject: [Hackrf-dev] Still hoping for PTT

Has there been any progress on implementing digital i/o from/to the hackrf One. 
I'm hoping that someday the hackrf can supply a PTT signal to an external 
amplifier.

Jake

___
HackRF-dev mailing list
HackRF-dev@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev

___
HackRF-dev mailing list
HackRF-dev@greatscottgadgets.com
https://pairlist9.pair.net/mailman/listinfo/hackrf-dev