It's not elegant but I just finished a rack/table using a butcher block
top (Home Depot) and angle stock on the front inside of the 2x2 wooden
legs to mount the p/s and a repeater I use for IRLP (duplexer later, one
pieces at a time). The table top is stained and matches the height of
the desk
I use a solid core door slab.
On Wed, Apr 15, 2020 at 12:47 Don Wilhelm wrote:
> When I built my operating desk, I made the top a full 36 inches deep so
> the face of the equipment is about 24 inches from the front. I also put
> the 2 pedestals on appliance dolly wheels so I can roll the desk o
When I built my operating desk, I made the top a full 36 inches deep so
the face of the equipment is about 24 inches from the front. I also put
the 2 pedestals on appliance dolly wheels so I can roll the desk out for
access behind the equipment. There are shelves in the back to hold
power sup
On 4/14/2020 10:18 PM, Victor Rosenthal 4X6GP wrote:
I chose to place my operating desk two feet from the wall. I refer to
the area behind it as the "cable vault." This solution is cheap in terms
of money and effort, but very expensive of space.
Yes. I wish I had thought of doing something lik
Wow, that is neat! Very impressive. Are you going to make one for the
various audio and control circuits as well?
I chose to place my operating desk two feet from the wall. I refer to
the area behind it as the "cable vault." This solution is cheap in terms
of money and effort, but very expensi
l 14, 2020 2:38 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 problem
Welp, operator error big time. Got an email from Elecraft tech support and
the first thing he told me to do was to unplug the RCA keyline and see what
happens.
AHA!
Last Friday I decided to use my IC-7300 inst
: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of William Carpenter
Sent: Tuesday, April 14, 2020 2:38 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 problem
Welp, operator error big time. Got an email from Elecraft tech support and
the first thing h
Welp, operator error big time. Got an email from Elecraft tech support and
the first thing he told me to do was to unplug the RCA keyline and see what
happens.
AHA!
Last Friday I decided to use my IC-7300 instead of my K3 in the SKSS WES
contest. Yes, blaspheme I know. The 7300 only has one key
For the second time i about two years my KPA500 is suffering from the low
RX sensitivity in OPR. Transmit is fine with full output ona ll bands.
The last time this happened the culprit was R7 on the PA unit which had
cracked and burned slightly. Elecraft sent me a new R7 very quickly and
for fre
"I have a KPA500 with a low HV reading. It is on the center tap and AC voltage
is 115v No load and 110v full load. The HV goes from 77v NL to 56v FL (500W
output) Is that something I should look into? "
The KPA500 high voltage (nominal 60 volt) power supply is unregulated. The
mains power
I did look at the parameters of my KPA500 this morning. In STBY the HV
is 75.4 and in OPER at 500 watts out, CW mode, key closed the HV is 63.7
and current is 10.5 amps. Amp is operated from a 240 volt source.
73
Bob, K4TAX
On 7/7/2019 6:20 AM, Mark Murray via Elecraft wrote:
For Doug, K
For Doug, K6JEY:
In answer to your original question, as to whether you should look into
the KPA500's low voltage values: Yes.
By far, the best advice and the best answers on this particular question
will come from emailing supp...@elecraft.com . By far.
Once the voltage questions are add
Is that something new? I’m not too surprised running it on 115 and starting at
77.
I’m on 240 dedicated circuit and starting at 82 v which loads to about 67v. I’m
doubting that there is any hard fault.
Chuck Jack Hawley
KE9UW
Sent from my iPhone, cjack
> On Jul 6, 2019, at 1:44 PM, Roy Koep
Could a rectifier diode have gone open (as in it's now a half-wave circuit)?
If so the filter caps are at 60 Hz. Just a thought...
RoyK6XK
I have a KPA500 with a low HV reading. It is on the center tap and AC
voltage is 115v No load and 110v full load. The HV goes from 77v NL to 56v
FL (
I have a KPA500 with a low HV reading. It is on the center tap and AC voltage
is 115v No load and 110v full load. The HV goes from 77v NL to 56v FL (500W
output) Is that something I should look into? Doug K6JEY
__
Elecraft ma
I've done some testing. I have a good selection of Times LMR-400-ULTRAFLEX
jumpers that I stocked up on from MPD Digital. Never had a problem with any
of their cables and so far it's looking like they are all good.
I set things up as Radio <--> KPA500 <--> DL1500 with new cables in between
and the
On PL-259 connectors, make sure they are more than finger tight. I use a
pair of 4" Channel Lock pliers to snug mine after they are finger
tight. Today's PL-259's may look good but indeed with many of them
today, the plating is crap!. Same for coax cable and the way it gets
terminated insi
Kevin der Kinderen wrote:
> I'm a bit surprised that's the conclusion as simply bypassing or turning
> off the amp but leaving it connected made the problem go away. I have some
> good cable on there now but can replace each one of them to try it out.
> I'll report back later on. I really hope it
Hmm... alright then. Jim sent me an email with the same conclusion. I need
to recheck all my cabling.
I'm a bit surprised that's the conclusion as simply bypassing or turning
off the amp but leaving it connected made the problem go away. I have some
good cable on there now but can replace each one
Hi Kev
Don is 100% right.
I would change all the cables and then test with the amp alone and the
tuner alone to narrow it down.
I spent 3 days debugging an Acom A1000 issue only to finally out I had a
bad jumper cable.
Mike va3mw
On Mon, Nov 13, 2017 at 5:05 PM, Don Wilhelm wrote:
> Kev,
>
Kev,
That behavior can be caused by a coax jumper, either loose or faulty in
some way. Make sure the PL-259s are tight and if you can substitute the
jumpers with known good ones - particularly the one between the KPA500
and the KAT500 and the one between your transceiver and the KPA500.
Ther
Waiting on an answer from Elecraft but thought I'd also check with the
group here.
I have a Flex 6500 with KAT500/KPA500 combo. It's been working great until
very recently. Within the past couple of days I was intermittently reading
high SWR when the amp is in operate. In standby or off everything
Marvin;
Assuming that you have the AUX I/O cable connected from the KPA500 to the K3,
and you have RADIO set to K3 in the KPA500 menu, then I suspect you have dialed
the power down to 0 on the K3 when the KPA is enabled.
The KPA tells the K3 its state when it switches to STBY or OPER. The K3 us
That is a mystery.
The KPA500 is simply an amplifier, so it should amplify the K3S PEP
power for SSB the same as it does for CW.
Take a look at the drive power from the K3S. If you are overdriving the
KPA500 in SSB, it may be switching in an attenuator.
That could result from having too much co
After switching from cw to sideband I have no output from either the K3S or
the KPA500. Simply putting the KPA500 into standby allows output from the
K3S. I think I have a switching problem. Where should I look?
Thanks
__
Elecraft mai
Mike:
Suggest changing fuses in input fuse block. I have experienced an
intermittent fuse problem in other equipment in the past that produced very
puzzling symptoms.
73 and good luck,
Dan
AC6DM
--
View this message in context:
http://elecraft.365791.n2.nabble.com/KPA500-problem-tp7614144p761
Jim,
I think you will find the KPA500 transformer to be quite robust, but of
course there is always a small chance that you have one that could be
defective. If you can monitor the DC voltage under load, that would be
revealing.
Contact k3sup...@elecraft.com or Jack Brindle (he has already re
have no facts to back
that statement.
Jim
W6AIM
.
-Original Message-
From: Ron D'Eau Claire [mailto:r...@cobi.biz]
Sent: Tuesday, February 16, 2016 5:13 PM
To: 'Jim Bolit'; 'Elecraft Reflector'
Subject: RE: [Elecraft] KPA500 problem
I've not seen
ssage-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Bolit
Sent: Tuesday, February 16, 2016 4:01 PM
To: 'Ron D'Eau Claire'; 'Elecraft Reflector'
Subject: Re: [Elecraft] KPA500 problem
The load regulation of the transformer/rectifiers is also
D'Eau Claire
Sent: Tuesday, February 16, 2016 3:41 PM
To: 'Elecraft Reflector'
Subject: Re: [Elecraft] KPA500 problem
On the fairly rare occasions I go QRO with the KPA500 it runs off of a 120V
wall outlet >50 feet from the breaker panel.
With the taps set so the key-up HV is near
On the fairly rare occasions I go QRO with the KPA500 it runs off of a 120V
wall outlet >50 feet from the breaker panel.
With the taps set so the key-up HV is near max (85V), the HV drops to close
to the minimum voltage (60V) at 500 watts on some bands. That's all due to
the 120V feed droop. Ther
>>
>> Cliff K3LL/6
>>
>> -Original Message-
>> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike
>> Crownover
>> Sent: Tuesday, February 16, 2016 8:22 AM
>> To: 'Nr4c'
>> Cc: elecraft@mailman.qth.net
>
On Tue,2/16/2016 10:07 AM, Guy Olinger K2AV wrote:
I heard of a problem something like this, not a KPA500, that turned out to
be a defective wall outlet.
Or a long run of relatively small wire to the outlet from the panel. Or
a bad splice at another outlet between your outlet and the breaker
day, February 16, 2016 8:22 AM
> To: 'Nr4c'
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] KPA500 problem
>
> Bill,
>
> Did that, it's set for 110v. I used the yellow tap, which gives me 75 v,
> right in the middle of the spec. I did try the other two
ubject: Re: [Elecraft] KPA500 problem
Bill,
Did that, it's set for 110v. I used the yellow tap, which gives me 75 v,
right in the middle of the spec. I did try the other two, but same behavior.
Thnaks,
Mike AD5A
-Original Message-
From: Nr4c [mailto:n...@widomaker.com]
Sent: Tuesd
Mike Crownover
Subject: Re: [Elecraft] KPA500 problem
What input voltage is it configured for?
Check manual for voltage tap info.
Sent from my iPhone
...nr4c. bill
> On Feb 15, 2016, at 11:11 PM, Mike Crownover wrote:
>
> I just bought a lightly used KPA500. It arrived from th
Did that..."power lost without controlled shutdown"
Thanks,
Mike AD5A
-Original Message-
From: Dick Dievendorff [mailto:d...@elecraft.com]
Sent: Tuesday, February 16, 2016 9:53 AM
To: 'Mike Crownover' ; 'AJ8MH Radio'
Subject: RE: [Elecraft] KPA500 problem
ctions and all seem in order.
>
> Thanks for your thoughts.
>
> Mike AD5A
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of AJ8MH
> Radio
> Sent: Tuesday, February 16, 2016 9:26 AM
> To: elecraft@mailman.qth.net
>
5A
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of AJ8MH
Radio
Sent: Tuesday, February 16, 2016 9:26 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA500 problem
No fault codes?
Double check amp's menu items and set all to default b
No fault codes?
Double check amp's menu items and set all to default before test.
Remove all cables. Connect dummy load directly to amp. Connect RF in
from K3. Connect "Key Out" to "PA Key."
Manually select same band on rig and amp. Set K3 for 10 watts drive.
Select "OPER." Now, try and key
E. Musick [mailto:markmus...@sbcglobal.net]
Sent: Tuesday, February 16, 2016 1:11 AM
To: 'Mike Crownover'
Subject: RE: [Elecraft] KPA500 problem
Mike,
First connect the amp to a dummy load and see how it behaves. This
eliminates the antenna. Yes, I know the SWR is 1:1, but it eliminates i
I just bought a lightly used KPA500. It arrived from the seller, well packed
and complete with cables, manuals, etc. I turned the amp on, interfaced it
with my K3, keyed the radio and the KPA500 immediately shut-off. No fault
light or error code, nothing. It shuts down just as if I had pressed the
Call Customer Support tomorrow morning. They may have more suggestions for you.
Worst case, you will need an RMA from them, but I really hope they can have you
try something that I’m not thinking of at the moment to make it work.
- Jack B, W6FB
> On Jun 21, 2015, at 10:04 AM, Ray W2RS via Elec
Hi Jack,
No asterisk.
Tnx, Ray W2RS
In a message dated 6/21/2015 9:37:57 A.M. US Mountain Standard Time,
jackbrin...@me.com writes:
When you switch to OPER, is there an asterisk on the left side of the LCD?
This would indicate that the PTT line is engaged or shorted. fix that
connec
When you switch to OPER, is there an asterisk on the left side of the LCD? This
would indicate that the PTT line is engaged or shorted. fix that connection and
things should return to normal.
There are several things that could be causing the trouble you see. Work
through them with Elecraft cust
Send it back for the TR switch update. This is a known problem with early
KPA500s and there is an easy factory fix.
Ed W0YK
_
Ray W2RS wrote:
My KPA500 amplifi_es_ (file://\\es) normally but seems to have a
switching problem on receive. The receiver
My KPA500 amplifi_es_ (file://\\es) normally but seems to have a
switching problem on receive. The receiver (I've tried several) works fine
when
the amp is turned off or when it is switched to STBY, but when I switch the
KPA500 to OPER the receiver goes nearly dead as if there is no anten
Barry and All,
Looks like you found the "fix" Barry. Often the only way to really reset a
microprocessor when it gets "stuck" is to completely disconnect all power
from the unit. On laptop computers I usually have to remove the battery as
well. Anyway, glad you solved the problem.
Dave W7
Good suggestion Jim.
However, I tried turning the mains power switch (on the back of the KPA500)
off and on and that appears to have cured whatever the problem was. Now
back at full power.
Thanks for your input.
73
Barry VK2BJ
On 26 September 2014 06:20, Jim Brown wrote:
> On Thu,9/25/2014
On Thu,9/25/2014 1:16 PM, Barry Simpson wrote:
Before I delve into the manual, has anyone any ideas ?
Put in a Skype call to Elecraft support?
73, Jim K9YC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraf
Good morning all
My hitherto bomb proof KPA500 has just failed.
I went to 40m SSB to chase some DX. I pre-tuned the KAT500 via the K3 tune
facility and then called the DX.
During the call, the KAT500 started its continuous retuning issue (I
thought that problem had been resolved but apparently n
Don't worry, John, you can still use the K3 buttons as usual to change bands,
but I would still recommend setting BND CHG to STBY on the KPA500 for safety
if you are using a manual tuner.
Glad to see the issue is now receiving so much feedback!
A word in Wayne's ear before Eric has to end the threa
So if this is a known issue that's been present for a year in the life of a
new product, one claim of which is tight integration into a chain of
products, what's the expected time frame to resolution? I just bought a
KPA500 precisely because of this integration but I see now I'll face this
problem
Yes, Bob. This is a very accurate description of the problem.
Bob Cunnings NW8L wrote
> I experience a similar thing. With KPA500 BAND CHG set to STBY and
> using the KPA500 band buttons to change bands, it happens if the
> KPA500 goes from OPER to STBY on band change. Elecraft support
> confirmed
*Same here on #679 and has been like it for a year or more I think?
the fix is to run OPER all the time which is not helpful if you need to use
a tuner...:-)
73
*
On 23 September 2012 18:23, Richard Squire - HB9ANM wrote:
> That's right, Fred and Mike - This is exactly what I have been mentionin
That's right, Fred and Mike - This is exactly what I have been mentioning
ever since I got my KPA500 a year ago. It only occurs when BND CHG is set to
STBY, which I think is safer. Elecraft was able to reproduce it and said it
would be corrected in a future release. The bug is supposed to be on the
I experience a similar thing. With KPA500 BAND CHG set to STBY and
using the KPA500 band buttons to change bands, it happens if the
KPA500 goes from OPER to STBY on band change. Elecraft support
confirmed the issue and said that it would be fixed in the next K3
firmware release.
Bob NW8L
>Fred,
>
Fred,
There is a known firmware issue which causes the K3 to sometimes "forget"
to go back to 100W when switching the KPA500 from OPER to STBY.
Mine has the same issue where I need to periodically reset the K3 PWR back
up to 100W when operating the KPA500 in STBY. So far the K3 remembers to
On 9/22/2012 3:05 PM, Bill K9YEQ wrote:
> Fred,
>
> More than likely you are changing freqs and the amplifier/K3 are folding
> back power based on detected antenna complex loading issues. Until the
> KAT500 becomes available, you don't need 100 watts on any band to get 500W
> out! Back off your pe
On 9/21/2012 5:01 PM, Phillip Shepard wrote:
> I tried tightening up the cables at both ends (BTW, I am using the control
> cable between the rig and amp for maximum integration, and the K3 knows to
> reduce the power out when the amp is in operate).
That is not totally true, for me at least. I
Did you find your problem? Any fault codes?
I suggest contacting supp...@elecraft.com, but if were me, I'd check all
internal connections first and do a quick visual. I suspect a problem
with the elaborate TR switching circuit or something that controls it.
I see a couple 51 ohm resistors on
Is this behavior present on all bands or just 40 meters? You might try
using the KPA500 without the control cable, as well.
73,
Scott, N9AA
On 9/21/12 8:01 PM, Phillip Shepard wrote:
> I put my new KPA500 (s/n 1057) together earlier this week and have been
> loving it, although it has seen only
I put my new KPA500 (s/n 1057) together earlier this week and have been
loving it, although it has seen only light use so far.
However, that changed this afternoon. I used it briefly on 40m LSB a few
hours ago and all was fine. About 35w of drive for 550w out. I just
retuned the antenna to the
Took two days to put this "kit" together and unfortunately it is dead.
Too many things are happening to describe, but Dale is helping and
hopefully in another week it will be on the air. Guess I'm not used to
building something w/o a soldering iron. :-)
Jay, W6JDB
K2/100, K3, P3 & maybe KPA50
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