KPA500 with Icom 7300

[Ad4K - Steven]

I am running an Icom 7300 with an LGD tuner.  Putting together the KPA500
kit.  Can anyone with same setup give me advice on cable hookups between
radio and amp?  Are there any IC 7300 settings required?  Yes, I have the
manuals.

Thanks, Steve AD4K
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[Ken Winterling]

Steven,

I use a KPA500 (and KAT500 tuner) with both an IC-7300 and an IC-7610. Both
have the transmit delay set for 15ms.
The amp is keyed directly from either rig using RCA/RCA cables from the
SEND jack to the amp's keying jack.
I do not use a keying line buffer between the amp and either rig. The amp
has a very low voltage/current keying circuit.
I also do not use the ALC line. Transmit power is set at about 21%.

The only other important cables are the coax from the radio to the amp and
from the amp to the tuner. I also have a cable
from the 7300 or 7610 tuner port to the KAT500.  Your LDG tuner probably
already has the cable.

I don't believe the LDG tuner can interrupt the keyng line to the mp the
way the KAT500 can. You will need to be careful to
put the amp in standby before initiating ay tuning operation so you do not
hot switch the amp or provide it with a very high SWR
or no antenna connection.

GL!

Ken
WA2LBI





On Wed, Jun 2, 2021 at 5:16 PM Steven Roth <[hidden email]> wrote:

> I am running an Icom 7300 with an LGD tuner.  Putting together the KPA500
> kit.  Can anyone with same setup give me advice on cable hookups between
> radio and amp?  Are there any IC 7300 settings required?  Yes, I have the
> manuals.
>
> Thanks, Steve AD4K


>
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[Ad4K - Steven]

Thanks Ken.  Your advice is helpful. I have set the transmit delay to 15ms.

I have found lots of info on using the IC7300 with the KAT500/KPA500
combination but none on using the setup that I have, ie., IC7300 exciter, to
KPA500 with LDG AT-1000 Pro II autotuner.  I will make sure that I don't
pump full watts into LDG tuner during tuning (I will use only the IC7300 to
do the tuning) or not to present a high SWR to the amp.  As you know with
the IC7300, I use the "tune" button on the IC7300 and it limits the output
to 10 watts for the LDG tuner to go through its tuning cycles (the internal
tuner in the IC7300 is bypassed when wired to the LDG tuner).  I have tried
to get some responses in other forums but no luck.



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