[VHFcontesting] Transverter interfacing with FT290RII

[Sean Waite]

You could interrupt the PTT connection from the mic and just tape the mic
button down. It's always on but you have it switched lower in the chain.

On Wed, Feb 14, 2018, 12:54 Mark Spencer <mark at alignedsolutions.com> wrote:

> Interesting.   I'd be curious in hearing more about this (I also have an
> HTX 100 earmarked for use as an IF radio, but I ended up using an Icom 735
> as the IF radio for my 222 transverter, I already owned it and it is almost
> the same size as the HTX100.)
>
> 73
>
> Mark S
> VE7AFZ
>
> Aligned Solutions Co.
> mark at alignedsolutions.com
> 604 762 4099
>
> > On Feb 14, 2018, at 9:16 AM, Zack Widup <w9sz.zack at gmail.com> wrote:
> >
> > I've usually been using a modified Realistic HTX-100 as an IF rig for the
> > microwave bands.I removed the rear power module and replaced it with a
> > piece of 1/8" thick aluminum where I placed the power and RF connectors,
> > removed the speaker and installed a homebrew 28 to 144 MHz transverter in
> > the space where the speaker was. It's well-documented where to tap off
> > connections inside the rig for transmit and receive RF and keying
> voltage.
> > The rig has its drawbacks but works well on the uncrowded microwave
> bands.
> > I've made hundreds, maybe over a thousand microwave QSO's with it over
> the
> > years.
> >
> > I now have an FT-817 which I'm working on using as an IF rig. It has the
> > advantage of two antenna connectors, which can be selected per band. I'm
> > hoping to use one of those on 28 MHz as the IF for my 50 through 432
> > transverters and the other as the 144 MHz IF for the bands above that.
> >
> > I think there is a point inside the radio that can be used as a T/R
> voltage.
> >
> > I'll have to dig into the schematic of the FT290RII a little further and
> > see at what point I can extract a T/R switching voltage.
> >
> > 73, Zack W9SZ
> >
> >
> > On Wed, Feb 14, 2018 at 10:08 AM, Mark Spencer <
> mark at alignedsolutions.com>
> > wrote:
> >
> >> Interesting..
> >>
> >> Apparently I'm not the only one working thru these issues.  With my Icom
> >> radios I like to intercept the PTT line from the microphone, route the
> PTT
> >> line thru a sequencer, then key the radio, amp, etc via the sequencer.
>  It
> >> seems safer that way but yes sending CW with this scheme is a bit more
> >> complicated than using SSB.  I should probably add a foot switch for CW
> and
> >> need to ponder how to tie that into the the PTT scheme.
> >>
> >> I also have a FT290 put aside for future use as an IF radio in my rover
> so
> >> this topic is of interest to me.
> >>
> >> 73
> >> Mark S
> >> VE7AFZ
> >>
> >> mark at alignedsolutions.com
> >> 604 762 4099
> >>
> >>> On Feb 14, 2018, at 7:02 AM, Sean Waite <waisean at gmail.com> wrote:
> >>>
> >>> That might be where being able to flip a switch would come in handy. If
> >> I'm
> >>> reading the documentation right, the DEMI transverters prefer you don't
> >> use
> >>> full- or semi-break in with CW anyway, so you'd want it to just stay on
> >>> until you're done transmitting. That's a good point though, especially
> >> with
> >>> a portable setup.
> >>>
> >>> Sean WA1TE
> >>>
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