Yaesu must have been ahead of the game with the 736 as it had separate key
lines for the different bands
-----Original Message-----
From: Joshua Arritt <jarritt@vt.edu>
To: Bill Olson <callbill@hotmail.com>
Cc: Crownhaven <crownhaven@bellsouth.net>; VHF Contest Reflector
<vhfcontesting@contesting.com>
Sent: Tue, Feb 18, 2020 3:16 pm
Subject: Re: [VHFcontesting] Icom 9700 vs Icom X75 series
I "retired" my 251As and 471A with an IC-9700 last month. BIG difference
in performance. Worth the jump.
Re: ACC connector -- a few of locals with 9700s were lamenting that not
only is it one ACC connector, but it's only one PTT signal out! That means
it keys all your amps regardless of what band you're operating.
Band data (freq) is available if the CI-V port is interrogated. This can
be done easily with Arduino, which can then route the PTT signal to the
appropriate band-specific accessories. That's been demonstrated to work
on a few radios around here. Same idea has been employed on the IC-7300
for band-selection-driven HF antenna switching, handy when remotely
operating the 7300.
With the exception of 1296, I've retired my amps for the moment as well. I
may re-employ them later, so as to save the expensive finals on the 9700
some stress.
VY 73 DE KF4YLM
On Tue, Feb 18, 2020 at 2:30 PM Bill Olson <callbill@hotmail.com> wrote:
> Steve, I indeed made a breakout box for my FT991 that uses the band data
> info to steer keying lines (and in the case of the 991 RF ports) to
> different bands.. It's based on a Unified Microsystems BCD-14 band
> decoder.. I'll try to find my info, I know it's here somewhere..
>
> bill, K1DY
>
> ________________________________
> From: VHFcontesting <vhfcontesting-bounces+callbill=
> hotmail.com@contesting.com> on behalf of Crownhaven <
> crownhaven@bellsouth.net>
> Sent: Tuesday, February 18, 2020 7:00 PM
> To: vhfcontesting@contesting.com <vhfcontesting@contesting.com>
> Subject: [VHFcontesting] Icom 9700 vs Icom X75 series
>
> I'm curious to hear from anyone who has transitioned from the Icom
> 275/475 to the Icom 9700. I've been using the 275/375/475 with great
> success but they are old radios. No idea if an upgrade would be worth
> it. I do find it strange that Icom continues to provide only one ACC
> port which makes keying, etc., amplifiers on all three bands
> problematic. I might also ask if anyone makes a break-out box that
> solves THAT problem.
>
> Regarding 1296, I'm using an DEMI 50 watt transverter for that band and
> would hate to have to buy a 1296 amp to compliment the 9700's 10 watts.
>
> Any experiences, thoughts, hello's from old friends appreciated.
>
> Steve, N4JQQ, EM55BD, six - 2.3
>
>
>
>
>
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