> Use software PTT in the applications while W4TV figures out what is
> going on with the MicorHam gear.
Damn it Don! *DON"T TELL USERS HOW TO USE MICROHAM PRODUCTS*
The microHAM instructions are very clear - *NEVER USE CAT FOR PTT*
YOU HAVE NO BUSINESS HANDING OUT INSTRUCTIONS THAT VIOLATE THOSE
OF THE MANUFACTURER. How would you like it if I told Elecraft users
to run their transceivers at 24 V to minimize IMD in the power amp?
Using CAT for PTT results in hot switching of amplifiers, antenna
relays, and other devices like antenna preamps while using hardware
PTT assures proper operation of sequencing circuits that assure
audio, external antenna switches, amplifiers, etc are switched *before*
the transceiver is placed into transmit.
Even the K3 PTT to RF delay is not sufficient to accommodate switching
delay in old amplifiers, EME sequencers or the LNA/preamp bypass relays
for external (active) receive antennas.
Are all those having a similar problem using MicroHam something? or
does it occur with other interfaces.
It occurs with other manufacturers products and CAT PTT - nearly every
manufacturer has a race condition in their controls when CAT and
hardware are mixed. Since CAT PTT has serious problems with hot
switching and most software includes specific PTT to CW and PTT to
Audio delays specifically to avoid hot switching, use of *HARDWARE*
PTT is always the smart choice.
73,
... Joe, W4TV
On 11/13/2017 7:08 PM, Don Wilhelm wrote:
Bert and all,
Use software PTT in the applications while W4TV figures out what is
going on with the MicorHam gear.
Are all those having a similar problem using MicroHam something? or does
it occur with other interfaces.
73,
Don W3FPR
On 11/13/2017 7:00 PM, Bert Garcia N8NN wrote:
The CAT and PTT are on different COM ports, per the installation
instructions for the microKEYER II when using WSTJ-X. And it's not a
stray RF problem as I have all the equipment bonded together, ferrite
cores on the audio and control lines, a line isolator in the feedline
where it enters the house, and line isolators between the rig and amp
and between the amp and antenna tuner. The lockup happens when
running only 30 watts with FT8. It never happens when running a KW on
many other modes. I run RTTY, PSK and other digital modes with no
problems.
Thus, I suspect the issue is associated with the WSRJ-X software as
the same issue occurs with various transceivers in multiple locations.
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