[VHFcontesting] Transverter interfacing with FT290RII

[Sean Waite]

Thanks for the responses! I got a few good ideas here. I'm not entirely
certain why it never occurred to me to pull the Push To Talk signal off of
the thing you push...to talk. Way easier than trying to tap the board.

I have some reading and building to do. Hopefully I'll be up on 7 bands
(Dare I say...hopefully 8? If I can pull together the scratch for 13cm) by
June.

Either way, looking forward to getting this all working smoothly.

73,
Sean WA1TE

On Tue, Feb 13, 2018 at 11:52 AM Michael Kana <aa9il at sbcglobal.net> wrote:

> Hi Sean
> I use an FT290mk2 with a sequencer. I use the 4th relay to close the PTT
> and key line and plug the key and mic into a “control box” where the
> sequencer relay is in line. I have the key and mic cables run to the radio.
> I flip a switch to sequence and when the fourth relay closes, the key and
> PTT lines are closed so I can then key or transmit.
> When done, flip the switch off, and the key and PTT lines are
> disconnected. I will never Key the radio until the sequencer is switched
> unless I intentionally bypass this scheme and plug into the radio direct.
> 73 Mike
>
> Warning!  This is transmitted over a non secure medium
>
> > On Feb 13, 2018, at 10:38 AM, Sean Waite <waisean at gmail.com> wrote:
> >
> > I've got one of the old FT290RII 2m all modes that I'm using as the IF on
> > my transverters. With the SG Lab devices, I can select between RF sense
> > switching and PTT switching, but I now have a DEMI 3cm transverter that
> > requries a real PTT line. The radio has the 25W amp that I'm not using
> for
> > these purposes, I just set the radio to low power (2.5W). What I'd like
> to
> > know is if anyone has a clever method of getting the PTT off of the
> radio.
> > The plug for the amp has PTT on it, I believe, and the amp isn't required
> > for operation. The problem with leaving the amp off to access this plug
> is
> > that then there are just 2 little spring tabs for power on the back,
> which
> > makes it difficult to get power to the radio.
> >
> > I could just tap the IF circuit for the amp inside the radio, but I
> wasn't
> > sure if there was a less invasive option.
> >
> > At some point I'd like to dig up the FBA-8 battery boxes for my 290 and
> > 790riis, but they appear to be kind of hard to find. It would make it
> less
> > likely to accidentally dump 25W into a transverter.
> >
> > Thanks and 73,
> > Sean WA1TE
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>