In a recent message, Ken Chandler writes
>
>I'm now seriously thinking of buying a 2nd kpa500 amp for SO2R!
>
>Cheers
>
>Ken..G0ORH
>
>Sent from my iPhone
Alternatively, Ken, you could operate your second KPA500 in parallel to
run the full 1kW ;-)
73 de David G4DMP
Sent from my Netbook
Hi Eric
Thanks for the email.
It's not a problem. really. In fact
I'm now seriously thinking of buying a 2nd kpa500 amp for SO2R!
Cheers
Ken..G0ORH
Sent from my iPhone
On 3 Aug 2011, at 16:55, "Eric Swartz - WA6HHQ, Elecraft"
wrote:
> When the back panel switch is on, the low
I seem to remember reading somewhere that the KPA500 could be configured to
power on and off with the K3, but can't find anything in the relevant manuals,
FW release notes, or menus. Is this possible or did I imagine it in a
drug-induced stupor?
73, Eric WD6DBM
Sent from my &$@!? iPhone
_
Rick,
Presuming that you've already taken Don's customary advice (check all solder
joints and re-heat anything that looks suspicious) in the vicinity of the
1st crystal filter, I would verify that one of the other crystals (X1
through X4) hasn't been inadvertently placed into one of the slots for
Rick,
While jumpering out the filter may increase the receiver response, there
are too many other things going on to make a solid judgement.
Receiver problems of that nature can be deceiving unless you do Signal
Tracing.
You apparently have a signal generator with a calibrated output, and I
s
Hi David,
It's 160mm to the top of the K3's case when the bail is extended.
73 de
Jeff Cochrane - VK4BOF
Elecraft K3 #4257 + PR6 + K144XV + KPA500 #166 = Fanbloodytasic performance!
- Original Message -
From:
To:
Sent: Thursday, August 04, 2011 10:10 AM
Subject: [Elecraft] K3 height w
Hi Rick,
Gary was out today - He should get back to you tomorrow.
Regards,
Eric WA6HHQ
---
www.elecraft.com
On 8/3/2011 5:14 PM, Rick Beatty wrote:
> Hi To the group -- this is my second time around, having 2 K2's -- as I
> build the second one I have run into an issue that some of you might
Hi To the group -- this is my second time around, having 2 K2's -- as I
build the second one I have run into an issue that some of you might have
seen, or heard of.
All of the checks and tests required up to and including phase two (
receiver checkout) are nominal -- however, I find that the signa
Hi All,
Can someone tell me the height of the K3 with the tilt stand extended?
I guess about 6 inches.??
I don't have a K3 yet but need to allow for it in case I get one for Christmas.
I'm constructing a new shelving system on the desk for the radio gear.
73
David
VK3GDM
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On 8/3/2011 9:40 AM, Rick Tavan N6XI wrote:
> I have experienced absolutely no hum, either mechanical or electrical,
> associated with my KPA500 in either of my two ham shacks.
>
> /Rick N6XI
Nor have I in my one ham shack. In fact, the only time I've heard the
fans come on is when I shut the am
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The unit in question is a Trimble Thunderbolt GPS -disciplined 10 MHz
oscillator. They are removed from last-generation E911 location equipment
manufactured by Andrew Corp in Lynchburg, VA (my employer). A ton of them
were surplussed out and wound up in the far East at a scrap dealer. They are
fine
Dear Gang:
KPA500 274 is on the air. However, with DIGOUT1 set to ON on 6m, the KPA500
will not amplify. Ther OPER light is on, but the amp is in standby. When I
configure DIGOUT1 to OFF on 6m, then the KPA500 transmits, but the PR6 won't
come on.
I am using a K3 with the ACC port daisy c
Brian: For us guys out there that may not be familiar with a GPS DO how
about a little information. I visited the e-bay site and found the titled
PRECISION GPS 10Mhz 1PPS picture. Now I can handle 10 MHz but what is 1PPS?
One pulse per second? One part per picosecond? Is that long term or short
ter
In case any of you guys have some idle cash lying around and need to upgrade
your bench scope:
http://www.edn.com/article/518976-33_GHz_100G_sample_sec_scope_claims_industry_s_best_accuracy.php
Maybe the Elecraft K4 with the 1.8 Mhz to 1.2GHz A-to-D direct conversion
frontend is not so far o
Bob, our KPA500 engineering project manager, will be contacting Klaus.
73, Eric WA6HHQ
---
www.elecraft.com
On 8/3/2011 1:37 PM, n...@n5ge.com wrote:
> Klaus,
>
> I know you've already contacted Elecraft Support about this. Right?
>
> If you have not, you will have a good deal more success co
One clarification to my last post.
It is important that users power off the KPA500 using the front panel
power switch before killing power with the rear panel switch.
If you only use the rear panel power switch for main power then any
changed parameters (including last band) will not be saved a
Klaus,
I know you've already contacted Elecraft Support about this. Right?
If you have not, you will have a good deal more success contacting them, since
they have probably already seen this before and know what to look for.
73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetim
Guys,
Used this to calibrate my Rubidium standard. Have no further use for it.
Working unit is complete with power supply, GPS, active antenna
interconnect cables and Windows software.
See:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290322053618
for pix of it.
Contact off reflector.
Petr,
There is no easy way to add 80 meters to the 4 band board - it would
take a large re-design effort and would produce only 3 bands when you
finish with it. There are only 2 Low Pass filters, one with a cutoff
above 30 meters and the other with a cutoff frequency above 15 meters.
80 meters
I have experienced absolutely no hum, either mechanical or electrical,
associated with my KPA500 in either of my two ham shacks.
/Rick N6XI
On Tue, Aug 2, 2011 at 11:08 PM, Klaus Koppendorfer wrote:
> discussion is drifting away to amplified speakers but there is realy a
> problem with
> HUM co
Hi all,
I would like to gently ask for help.
Is it possible to add 80m band to K1 using 4-bands module?
My daddy has in his K1 40/30/20/15 band module currently but
as he like 80m he would like to add 80m band to his K1.
Is there any combination like 80/40/30/20 or so available please?
Thank Yo
No sooner do I make a post regarding the KPA500 hum issue (below) then I
read a post from Eric (WA6HHQ) saying that the hum is normal for the design
and not a problem. Thanks for the feedback Eric. Now that I know it normal
I'll not worry that I did something wrong when I assembled the amp. ;-
I confirm the exact same hum issue as Mike describes below.
(Front panel power switch is off and there is an intermittent acoustic hum
that can be heard)
I own KPA500 #236. It's not a problem so long as it's not doing any damage.
Lets see what the folks at Elecraft come up with after their invest
When the back panel switch is on, the low voltage power supply for the
front panel is still on, allowing the microprocessor to read the front
panel 'power' switch and talk over RS-232. A low level of power supply
hum from this small transformer is totally normal in this case. Of
course, turnig
Geoff is quite right. The test is to ensure there is not a short circuit
from the tab of U3 to the heat spreader, indicated by a reading such as you
see when the DMM leads are touched together. There are paths between the tab
of U3 and ground through the power supply circuit. These paths include
va
My Got Ya:
One part of the learning curve that I discovered is that you must turn on
the K3 before placing the KPA500 in Operate when you first power=up the
station.
On my desk it was just more logical to turn on the KPA first and while I was
there to press Oper. I Then had to figure out why I o
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The assembly manual says the resistance between the tab of U3 and the
mounting screw or heat spreader is "typically greater than 5000 ohms", so
it's not total isolation you're looking for, unlike the four rectifiers on
the rectifier board. In my case the DMM read 10,000 ohms between the tab of
Hi
I took part in IOTA contest at the weekend in the unassisted category, CW, high
power.
The KPA-500 was used for the first full 24hrs contest here with M3i call-sign
and I did give it a darn good work-out end result performance was just fab.
No hang-ups, instant power, band change, big pile-ups
Hi Peter
Diagnose/fix the Isolation problem between U3 and the heat spreader
before proceeding, Isolation here is 'not optional' it's required.
Inspect U3 carefully for signs of damage. Check for 240 Ohm between U3
pin 1 and U3 pin 2 (this tests R4 a SMT resistor on the underside of
the PSU boar
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