FWIW, I've noticed these clicks from within my KPA500 too. I always
assumed they were thermal expansion and contraction of hardware within
the amp. I ignore them because they have
never been associated with any problem with the function of the amp.
Besides, I don't know how you'd begin to try
Hi Group,
I recently read here about an automated routine to do the sideband
nulling procedure on the KX3. I understand it uses an XG3 ( which I
have) and a software utility.
Anyone know where I can get a copy of the software required? I
emailed an support@elecraft a couple of weeks ago with
I'm reading descriptions of the hollow and echoey sound of the KX3
monitor audio when running any compression. This isn't new in
firmware version 1.50. It's sounded like this on my KX3 from the
beginning - I have serial # 2511. It's just the way the monitored
audio sounds on the KX3 with the
Hello Group,
I'm running KPA500 #1076 with firmware 1.23 installed. It's
connected to my K3 via the elecraft AUX cable and is connected to my
PC via serial to USB adapter cable using FTDI chipset. Interfacing
functions with the PC and K3 work flawlessly.
It runs perfectly apart from one
Then you are a lucky fellow, Ed. My VFO NR=ON is not nearly so
effective and neither can I advance the AF gain to 40 without horrible
distortion - my usual audio gain runs around 20 and the artefact is
clearly audible at that level.
I guess this suggests some considerable variation between
Hi Group,
FWIW, I have an observation about the KX3 VFO tuning noise.
I assembled my #2511 (absent any options) from the kit. Over
a month of use, I noticed the raspy VFO tuning noise only on 10m, in
quiet band conditions. I couldn't hear it anywhere else.
To:
Cc:Elecraft Group
Sent:Tue, 18 Dec 2012 15:11:54 -0800
Subject:Re: [Elecraft] KX3 VFO tuning noise...an observation...
John,
Did you try setting RX SHFT to 8.0 on affected bands?
Wayne
N6KR
On Dec 18, 2012, at 3:05 PM, zendoc@netspace.netau wrote:
Hi Group,
FWIW, I have an observation
Hi Group,
I've just finished building and calibrating a KAT100 to go with my K2
/ KPA100 combination. The build was very smooth and the calibration
routine straight forward. It's tuning my 80m loop, multi-band, just
fine.
I'd like to check my understanding about
Hi Group,
Just getting to know my KPA500 which I finished assembling yesterday. What a
great amp.
I've noticed that when I turn on the rear power switch, the LCD backlight
blinks on for a fraction of a second, then turns off and stays off until you
hit the front ON switch.
Is this blinking
Hi All,
Thanks for the messages about the power up LCD blink - it's the way it should
be.
Now another question: my KPA500 replaces an old AL811. I noticed, when I
connected the KPA500 in line, that the K3 SWR meter was giving slightly higher
than expected readings with the amp in standby.
Hi David Group,
I did find the spec for the input SWR in the manual - it's listed as 1.5:1,
so my amp is well within spec. I'm going to forget about it. I guess I'm used
to old tube amps with tuned inputs you could adjust on a per band basis. This
is my first SS amp, so I'm learning.
Hi Dominic -
Sounds like you're having a lot of fun out there in paradise. Good
dx too. My KX3 is about a month away, otherwise I'd really
have enjoyed a KX3 to KX3, island to island contact.
Have fun and take care,
73
John
VK7JB
Hi Group,
I've just re-run the TX Gain calibration routine on my K3 using the K3
Utility 1.12.9.22 and hit a snag.
5W and 1mW calibration routines run perfectly, all bands.
On the 50W calibration, on the 50Mhz band, the K3 LCD display show the
ERR TXG message. All other bands calibrate without
Group,
I think I've discovered the cause: I noticed the SWR seen by the
K3 at 52.00MHz is 1.2:1, whereas it's 10:1 on all other bands. This
was shown on the K3 SWR meter and confirmed with my antenna analyser
at the K3 antenna connector. I did some detective work and
Sorry about the typo:
I noticed the SWR seen by the K3 at 52.00MHz is 1.2:1, whereas it's
10:1 on all other bands.
That should read 1.0:1, not 10:1
73,
John
VK7JB
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Hello Group,
Apologies if this is too far off topic, but I have a question about
ground connection on a DX Engineering balun.
I have an 80m horizontal loop, fed with 300 ohm ladder line. I use
this multiband. The ladderline ends just outside the shack at a DX
Engineering 1:1 current
Hi Jim group
I did an experiment today and tied the balun case/coax shield to station ground
via the stud.
I found 2 things:
# 1 the manual tuner settings required for 1:1 match changed on all bands, but
the KAT3 and manual tuner were still able to find a 1:1.0 match on all bands
80m -
Hi Rich,
This DXE balun is just a hefty 1:1 choke balun It's a high grade
coax (50ohm) wrapped through ferrite cores. The balanced terminals
are floating and the unbalanced end is connected to the aluminium
housing and the shield of the 6 foot length of RG213 coax which
Hello Group,
I've just re-hung my 80m horizontal loop. With so much wire in the
air, I'm reviewing my static charge risks and how to reduce them to
protect my K3. I'm in the mountains - things get bumpy and charged
up here. I once lost the wattmeter diodes in my K2/100 to a static
event, so I'm
Hi All,
I would value some advice. Is it necessary to use a keying buffer between my K3
and my old AL-811, or is the K3 keying circuit robust enough not to need this
interfacing arrangement? I currently have an ARB 704 buffer in the keying
line, but I'm simplifying my shack wiring and wonder
Don -
Thanks - that 's exactly what I needed to know. I've measured an
open circuit voltage of 16.2VDC at the amp keying RCA jack and current
of 116mA when the relay is closed. These parameters are well below
the limits of the K3 keying circuit, so I'll remove the buffer
interface unit.
I see
Hello Group,
I've just completed building KX1 # 2644, including the KXB3080 module,
and have discovered a problem.
All progress testing and alignment proceeded smoothly to the end of
both manuals. But I've noticed that when listening to the KX1's
transmitted signal (using my K3 as receiver)
hi Bob,
I've used both the MFJ 1026 and ANC-4 noise cancellers for intermittent noise
of various kinds, all coming from my neighbours. Both units had their pros
and cons but after using both, I can say that in practical use neither one out-
performs the other.
The ANC-4 is more compact
If you think EU UK are remote from Aptos, then think about me in Tasmania! I'm
on the edge of the world and knuckles are white :)
I've had a large number of packages shipped to me from Elecraft other US
suppliers via the USPS over the past 2 years - more than 50 - and I've learnt
to be
Wow Mike, that's really bad luck and very frustrating.
I've been about to order a KPA500 to go with my K3, but after your story, I
might hang back a while. Bad news about having to ship your amp back, but not
as expensive has having to ship it back to the US from down here. I wouldn't
like to
Hello Don,
I will always be very grateful for the time and expertise you offer so freely to
this group. Your volunteer effort is extraordinary. As a result of your
support, I've completed a K1, a K2/100 and am now about to put together a K3.
Yes, I had problems along the way, and although I
Hi Jim,
I bought one of Fred's knobs. You'll find the details and a video demo here:
www.73cnc.com
Beautiful product, aesthetically and functionally. Makes the K2 VFO a joy to
play with and to look at. I always thought that the stock VFO knob was cheap
looking, too light to allow a good
I too had fast, efficient service from YamahaMusicSoft online when I bought my
CM500's. Shipping cost was very competitive to AU. And from memory, the cost
of the CM500's wasn't that much greater than the other online discounters,
which, wouldn't/couldn't ship downunder anyway.
73,
John
Hi David,
I built the KPA100 for #6998. It went together very easily, but took longer
than I imagined. It's a fairly compact board and quite fiddly in parts, but
there were no unexpected hitches and it fired up first time and has gone like
a dream since. I also needed a fairly hefty iron
Don,
The KPA100 is new -from Elecraft in September 2010 - and it therefore is the new
design with the blue toroids @L16/RFC1. The shield is installed as instructed,
using the 2 solder lugs to the SO-239 socket.
I took the KPA100 off the top of the rig, as you suggested, but there is no
Steve, thanks.
I'll investigate the suggested mod to the KSB2. Have you had to do this mod
yourself? Did those resistor values work out about right for you (1k0 and
1.5k)? Did the mod significantly affect the ALC action on higher bands?
I don't want to scarifice too much power out on 20m.
Hi All,
K2 #6998 has had a short life. Working perfectly with KSB2/KDSP2/KNB2 all
installed until tonight.
I decided to tweak one of the BFO settings, connected the frequency counter to
the control board and was about to connect it to the BFO test point on the RF
board, when I dropped the tip
Hello Group,
K2 #6998 is now singing. The calibration and alignment went very smoothly. I
feel very pleased with myself :) I've built the KSB2, KDSP2 and KNB2 to go into
this rig, but it's currently still a base K2 while I learn to drive it.
I have noticed something odd about the power while
Hi Group,
K2 #6998 is alive and listening on 40m.
I'm no expert in all this, so I have a basic question about using Spectrogram
for BFO alignment.
I've been using Spectrogram to align BFOs/filters for CW and SSB, having read
some tutorials about how to do this. On CW, I'm adjusting the BFO
Hello All,
Just got to the stage of completing the FP of K2 #6998. I'm wondering how much
resistance in turning the encoder shaft is normal on the K2? Even without the
felt washer, there is quite a bit of friction turning the shaft of my encoder -
it's very smooth, but there's no way I could
Hi group,
Wondering if anyone has thoughts on how one would go about re-insulating areas
of bare toroid wire?
This is why I'm asking: I've finished building the KSB2 module. The board
holes for the leads of the small RFC1 and RFC2 are relatively widely spaced
apart and the leads of my toroids
Hi Pat and group,
FWIW, I have just built an HF Packer Amp and have exactly the same problem with
marked audio distortion on SSB when driving it with my FT 817nd. Maybe the
problem isn't the K2?
I have discovered others with the same problem, but no-one with a solution to
this Amp's non-linear
Hi Stan,
Please could you point me in the direction of the revision G-11 of March 10? I
have #6998. It was delivered with the G-10 errata, but looking on the Elecraft
website in the manual section, its only rev G-10 of October 20 2009 listed as
current. Is the new revision hidden somewhere
Ah, yes Stan - I can see now: there are x28 0.001 (102) caps on the RF board,
but only 22 designators listed in the manual. Searching the text, I can see
that C1, C2, C9, C17, C26 and C27 are missing from the designators column. And
there's definitely no erratum on the Rev G10 sheet related to
Hi Stan All,
For those interested, I rechecked the Elecraft site today and the new, rev G11
has just been posted.
Thanks!
John
VK7JB
This email was sent from Netspace Webmail: http://www.netspace.net.au
Hello All,
seems there's a burst of K2 assembling going on in the world. I've just started
#6998 and all is going well so far. Hoping I won't need too much help, but it's
good to know the group is here. I've found a review of old K2 postings very
helpful, along with Don's tips about
Hi Ross,
I had a similar moment of worry when I looked at some of the ICs under an
illuminated magnifying glass and just saw a blank top with, apparently, no ID
markings. Then by accident, I slightly tipped the top face of the IC away from
the light so the top was illuminated tangentially and
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