This is a question I've been wanting to ask...
I've had a KPA500 for 4 years and I've noticed that 20 meters requires
more drive. Most bands require 30 watts or less, but 20 requires 35-37
for 500 watts out. In the phone portion of 20, an SWR of 1.4:1 WILL
cause a fault. It's just real sens
Looks like the Kenwood switches high during transmit and the KPA500
requires a low for transmit. KPA500 specs in my manual say +5V max, open
circuit on receive, closed to ground on transmit. My old KPA500 manual
doesn't show Kenwood interconnections. Only the K3, Yaesu and Icom.
Yup, ya need
I have clicking, but it doesn't following the keying. (Maybe you meant
AFTER keying.) It happens after a long transmission...for the most
part. It has to do with flexing of the heatsink or other parts of the
chassis when the unit heats and cools. I believe it's been covered here
before.
J
t board
plug? That would be too easy. 270 and 60 volts run to the PA assembly.
You would have to isolate the PA assembly from the power supply for
troubleshooting.
Give Elecraft a call and they will help you out!
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Wed, Feb 12,
Seems to be a threshold around 25 watts. for the two bands I checked. I
drive my amp with 13 watts on 30 for 200 out, so in standby, I don't
show any power.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Thu, Oct 24, 2013 at 1:41 PM, Robert Redmon wrote:
Sorry if
Look on page 9. The asterisk indicates a valid PA key signal.
Underscore indicate INHIBIT.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Fri, Oct 4, 2013 at 12:54 PM, W5UXH wrote:
UPS delivered around 4 PM yesterday. Could not completely switch over
to the
new setup
Under "Hard Faults" on page 12 of manual.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Fri, May 17, 2013 at 5:19 PM, W5KDJ wrote:
Just built the amp but cannot find anywhere it says what the INFO
button is for?
W5KDJ - Wayne Rogers USNR (Ret.)
3DA0KDJ 5R
anyway as recommended.
See ( http://webpages.charter.net/aj8mh-radio/notebookind8.html ).
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Thu, Nov 8, 2012 at 12:46 AM, Jack Molinari wrote:
> Am I correct that PA KEY of the KPA 500 is connected to pins 2 and 3
>
://webpages.charter.net/aj8mh-radio/notebookind8.html ).
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Thu, Nov 8, 2012 at 12:46 AM, Jack Molinari wrote:
> Am I correct that PA KEY of the KPA 500 is connected to pins 2 and 3
> of the Linear plug on the rear of the FT 950 in order to grou
My wife was out at the cabin with the gals the weekend I built mine. I
had 4 cupcake tins full of parts all over the kitchen, and nothing was
missing. It was a glorious weekend!
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Tue, Oct 2, 2012 at 10:23 AM, Stan AE7UT
I thought about this for a couple seconds... I have seen some rigs have
a rather large difference in power out between mark and space tones.
With a small difference in drive I would expect to see a large
difference in power out of the amp with these radios. I've also heard
some radios with a
My specs:
250 watts out
10 watts drive
64 volts
8.5 amps
240 V line
Temp has got up to 52c @ 300 watts.
Haven't seen any warnings, but the fan kicks in more often as expected.
I'm uneasy running it at 500 watts during a contest.
Joe Hutchens ( AJ8MH )
http://webpages.charter
rs on the schematic at the input to the PA
module, so if the TR switch was working, I would NOT expect hi reflected
power to the rig with no power out of the AMP.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Fri, Sep 21, 2012 at 8:01 PM, Phillip Shepard wrote:
> I pu
st 21, 2012.
It would be nice for the amp to go to STBY, so I can make sure the
auto-tuner is good to go.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
On Sat, Sep 8, 2012 at 9:46 PM, Jack Brindle wrote:
> Make sure you set the menu parameter RADIO to BCD. The Ban
this.
>
> Jack Brindle, W6FB
> Elecraft Engineering
>
> On Sep 8, 2012, at 5:46 PM, Joe Hutchens
> wrote:
>
>> I just finished building the KPA500 and have it interfaced to my
>> Yaesu FT-950. The KPA500 follows the 950 band changes and keys fine.
>> However,
after a band
change. Is this option just for the K3 or is there a software glitch in
the amp?
Thanks,
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
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to take advantage of the linear port available on the Yaesu.
Joe Hutchens ( AJ8MH )
http://webpages.charter.net/aj8mh-radio/
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