Hi
I have been watching this thread with interest as I just bought a
ATU-1000 kit and have been think the same way about upgrading the
functionality. The major problem is the lack of IO on the processor
with all the pin being utilised. As the control board has been
reduced in size by the use of the driver ICs, would it be possible
to go to the 16F1939 in the 40 pin package. This would provide more
IO and allow the UART IO to be freed for comms.
In my build, I'm going to add a relay to daisy chain the PTT from
the radio to the amp. This allows the tuner to drop the amp out of
circuit while tuning and only use the drive from the radio, so
preventing expensive mistakes.
Cheers
Reid
Gi8TME/Mi0BOT
On 02/03/2023 12:31, Paul Decker wrote:
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well
it never hurts to ask. IMO, not having full RC control is a
big shortcoming.
Here's why.??
- it allows you to setup preset memories
with pretuned settings so you can switch from frequency to
frequency without transmitting, for example for ALE. This is
good when running high power, you don't have to have low power
exciter before amp to return.?
- it allows you to manually set LC values.
Sometimes this is desired when you can't get a good match, you
can get a 5:1 at the antenna, then use the internal radio ATU
to finish off, not ideal, but operationally viable.
- it allows you to see the swr at the tuner
(assuming there is a uart command to get forward and
reflected)
I've built the software in the IDE,
adding uart looks viable from the software side and is on my
///<Todo list.? <- yes, that's a doxygen comment?
But again, thanks for the reply,
easy enough to change later.?
Paul.? ?
Hello Paul,
No, RC7 and RC6 are already used in capacitor switching. This
would require David to redo lots of code, but if he does, I can
do another version with RS485 on a PCB.
?In general my idea is to build a good plug-and-play box at the
antenna, fully automatic and standalone.
