Yes that would likely work. (I would need to double check that the newer high
tech microphones and radios worked ok during RX with that configuration.)
73
Mark S
VE7AFZ
Aligned Solutions Co.
mark@alignedsolutions.com
604 762 4099
> On Feb 14, 2018, at 10:08 AM, Sean Waite <waisean@gmail.com> wrote:
>
> 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@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@alignedsolutions.com
>> 604 762 4099
>>
>> > On Feb 14, 2018, at 9:16 AM, Zack Widup <w9sz.zack@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@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@alignedsolutions.com
>> >> 604 762 4099
>> >>
>> >>> On Feb 14, 2018, at 7:02 AM, Sean Waite <waisean@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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