Actually, no. The KAT500 does not communicate with the KPA500, only the K3. In
RADIO=K3 (on the KPA) changing bands on the KPA500 causes the KPA to send a
special Auxbus message to the K3. The KAT500 cannot receive this message. The
K3 does a band change, then sends data using normal Auxbus
On Tue, Apr 27, 2021 at 8:34 PM Andy Durbin wrote:
> "It's not clear why this feature of the KPA500 is a "PITA," since the
> majority of users want the rig and the amp. to always be locked to the same
> band. "
>
> And that is exactly why the band buttons are a PITA - If pressed they
> would
"It's not clear why this feature of the KPA500 is a "PITA," since the majority
of users want the rig and the amp. to always be locked to the same band. "
And that is exactly why the band buttons are a PITA - If pressed they would
ensure that my KPA500 is NOT on the same band as my transmitter.
OTOH, if you change Radio type from K3 to BCD, and have set the K3
menu *CONFIG:PWR-SET
*to *PER-BAND*, the K3 will no longer be able to recognize when a KPA500 or
KPA1500 is switched from STBY to OPER, so there will effectively be just
one fixed drive power setting stored per band, instead of two
It's not clear why this feature of the KPA500 is a "PITA," since the
majority of users want the rig and the amp. to always be locked to the same
band. However, I suppose it could be a problem in a station where antenna
switching is all manual rather than automatic.
In that case, one can change
That also controls the KAT500 when connected.
73, Lou KE1F
On 4/25/2021 4:08 PM, Andy Durbin wrote:
"FYI, you can still tap the BAND buttons on the KPA500 to change bands on the K3,
because that uses the AUXBUS line (ACC Pin 2), not the BAND DATA lines. Many folks may
have never discovered
"FYI, you can still tap the BAND buttons on the KPA500 to change bands on the
K3, because that uses the AUXBUS line (ACC Pin 2), not the BAND DATA lines.
Many folks may have never discovered this cool feature of the KPA500 and
KPA1500."
I had to write code to put the KPA500 back on the
Does your automatic antenna switch use the Unified Microsystems BCD-10 or
BCD-14 band decoders, or is your design similar to the 4O3A Antenna Genius?
These products all use opto-Isolators on the four Band Data lines in the
AUX cable. Wiring this type of decoder in parallel with the
is and invitation for issues.
73
Bob, K4TAX
Message: 6
Date: Fri, 23 Apr 2021 21:17:02 -0400
From: "Joe K2UF"
To:
Subject: [Elecraft] K3/KPA500 question
Message-ID:
Content-Type: text/plain; charset="us-ascii"
I have my K3-KAT500-KPA500 working great. The amp is off to
Check the AuxIO cables. They carry the band data from the K3 to the KPA500
(BAND0-3 signals). If they are not connected correctly or either cable is
damaged, I would expect the behavior you describe.
The AuxIO cable goes from the K3 to the KAT500, then another from the KAT500 to
the KPA500. Be
Still won’t fix why the amp and radio are losing sync.
Sent from my waxed string and tin cans.
> On Apr 23, 2021, at 9:33 PM, Michael Coogan wrote:
>
> https://kv5j.com/
>
> Get one of these!
> Mike KB7ME
>
>
>> On Apr 23, 2021, at 18:17, Joe K2UF wrote:
>>
>> I have my
https://kv5j.com/
Get one of these!
Mike KB7ME
> On Apr 23, 2021, at 18:17, Joe K2UF wrote:
>
> I have my K3-KAT500-KPA500 working great. The amp is off to the left side
> and I can't see the display easily. while working on building an auto
> antenna switch I noticed that the band
I have my K3-KAT500-KPA500 working great. The amp is off to the left side
and I can't see the display easily. while working on building an auto
antenna switch I noticed that the band display on the amp does not synch
with the K3. It seems to be random. If I hit one dit on the key the amp
Hi jim,
With my K3 set to 10 W, I got 250-260 W out on 6 m with the KPA500.
And the K3/10 will deliver up to 12 W so you should be on the safe side.
Why not a KX3?
73 Richard - HB9ANM
I am considering a K3/10 and the KPA-500. Anyone out there using
this setup and how much power can you
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