Also, many people forget that the KAT500 works on RX as well as TX and provides
a band-pass filter which changes position across tuning segments.
If you’re using the KAT500 without the Aux cable and the main TX antenna for
RX, as soon as you tune the RX away from the current tuned segment, the
I have a KPA-1500, and followed the manual's instruction to run an Aux
cable between my K-3's ACC jack (on the KIO3B) and the KPA-1500. I
prefer to have the band changing already accomplished before I go key
down, even for just a dit.
73, Pete N4ZR
On 11/13/2023 7:14 PM, Jim Brown wrote:
I
I have cables that control the amplifier for each radio.
By default, the KPA500, KPA1500, and KAT500 all have near-instantaneous
frequency-detection. They switch very quickly to the right band, and the
tuners will recall previous antenna tunings for the detected frequency.
All it takes is a
Doug,
You will have to use a switch that changes all 15 conductors. VGA
switches may not implement all conductors and worse yet, some may be
connected together to common (ground).
73,
Don W3FPR
On 11/13/2023 3:18 PM, Doug Millar via Elecraft wrote:
I am trying to use my K3 and a Yaesu
I am trying to use my K3 and a Yaesu FTDX10 with my KPA 500. I have cables
that control the amplifier for each radio. What can I use for a switch box to
switch the cables into the amp? A VGA switch did not work. Doug K6JEY
__
On page 23 of my KPA500 assembly manual, relating to the mounting of the
rectifier board, it is clear that thermal insulators must isolate the
rectifiers from the chassis, and also, that insulating shoulder washers
must be installed in the four places that you mention as your concern.
The next
I'm assembling a KPA-500 that I received today and I'm at the step where
I mount the Rectifier bd to the Z-bracket. It looks like the 4 holes for
mounting the rectifiers should be threaded for 4-40 screws but mine has
about 1/8 holes. There is no mention of using a screw and nut to mount
them
Gary,
Try to put a 4-40 screw into the holes. If it goes through, it is a 1/8
inch hole (clearance for 4-40 screws), but if it must be threaded in,
all is well. A threaded hole for 4-40 will look almost like a 1/8 inch
hole.
Yes, the holes should be threaded for 4-40.
73,
Don W3FPR
On
something I don't see in the specs of the KPA500, and I wonder if possible
the ability to have the KPA500 remember which antenna to associate with which
band, and appropriately switch a remote electronic antenna relay. Automatic
amplifier band switching is of limited usefulness unless the
Fred,
I would think the KPA500 would be using the same antenna system as is
being used by the K3.
If that is the case, any automated antenna selection system that was
used by the K3 would also be used when the KPA500 is in-line. So I fail
to understand why that additional capability needs
- 51 KPA-500 - S/N 27
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Sunday, July 10, 2011 9:56 AM
To: Fred Maas
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 Question
Fred,
I would think
: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred Maas
Sent: Sunday, July 10, 2011 6:36 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA-500 Question
something I don't see in the specs of the KPA500, and I wonder if possible
the ability
I've been using a KRC2 for a couple of years. It's an easy build and easy to
set up.
I've never had a problem with it.
73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member
On Sun, 10 Jul 2011 07:35:40 -0600, Fred Maas just.one.h...@gmail.com wrote:
something I don't
Thanks for reply. That is what I thought.
I am not familiar with the various outboard devices to which you refer (as
have never needed them). I am not suggesting that the KPA500 needs
additional antenna outputs though that is one way to do it. That would
constritute an internal antenna
.
--
Message: 41
Date: Sun, 10 Jul 2011 07:58:47 -0700
From: Dick Dievendorff die...@comcast.net
Subject: Re: [Elecraft] KPA-500 Question
To: 'Fred Maas' just.one.h...@gmail.com
Cc: Elecraft@mailman.qth.net
===snipped
The Antenna1 output of the K3 goes to the KPA500
, July 10, 2011 11:26 AM
To: Dick Dievendorff
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA-500 Question
Thanks for reply. That is what I thought.
I am not familiar with the various outboard devices to which you refer (as
have never needed them). I am not suggesting that the KPA500
Oops!
We don't offer an antenna switch.
Sorry, Jack!
73 de Dick, K6KR
-Original Message-
From: Willard Myers [mailto:k...@me.com]
Sent: Sunday, July 10, 2011 12:10 PM
To: Dick Dievendorff
Subject: Re: [Elecraft] KPA-500 Question
On 2011.07.10, at 15:02, Dick Dievendorff wrote
Fred and all,
As Dick's post stated, the K3 band data outputs can be paralleled with
the KPA500 lines.
The KPA500 has internal protection diodes to isolate it from external
band decoders that might damage the KPA500 band data input circuits.
The only catch is that currently the K3 has
If the band decoder devices have their own pullup resistors
(especially those who pullup to +12 volts), the K3 and/or the band
decoder may have problems because of differences in the supply
voltage to the pullups, and the cure is to add series diodes (with
the cathode end toward the K3) to
A benefit of Elecraft's not including multiple antenna outputs in the KPA500
is being able to price it lower and not forcing customers to buy a
capability that they don't need. The Alpha 9500 has a sophisticated
4-antenna output capability, but that adds to the price whether it's needed
or not.
Joe is correct that the diodes will not prevent the K3 drivers from
seeing the higher voltages from an external band decoder, and if the
voltage is higher than the 5 volt level that the K3 resistors are tied
too, current will flow through the two pullup resistors. The real cure
is to remove
Lyon tony.l...@austin.rr.com
Cc: Elecraft Reflector elecraft@mailman.qth.net
Sent: Wednesday, April 21, 2010 5:38 PM
Subject: Re: [Elecraft] KPA-500 Question
Hi Tony,
The KPA-500 is designed to work with any radio.
73, Eric WA6HHQ
---
On 4/20/2010 5:51 AM, Tony Lyon wrote:
Eric
: Eric Swartze...@elecraft.com
To: Tony Lyontony.l...@austin.rr.com
Cc: Elecraft Reflectorelecraft@mailman.qth.net
Sent: Wednesday, April 21, 2010 5:38 PM
Subject: Re: [Elecraft] KPA-500 Question
Hi Tony,
The KPA-500 is designed to work with any radio.
73, Eric WA6HHQ
---
On 4/20
Reflector elecraft@mailman.qth.net
Sent: Wednesday, April 21, 2010 5:38 PM
Subject: Re: [Elecraft] KPA-500 Question
Hi Tony,
The KPA-500 is designed to work with any radio.
73, Eric WA6HHQ
---
On 4/20/2010 5:51 AM, Tony Lyon wrote:
Eric,
Will the KPA-500 be designed to support both
Hi Tony,
The KPA-500 is designed to work with any radio.
73, Eric WA6HHQ
---
On 4/20/2010 5:51 AM, Tony Lyon wrote:
Eric,
Will the KPA-500 be designed to support both the K2 and the K3,
or just the K3?
73,
Tony Lyon ( KJ5XF)
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