First, the 10V regulator failed a while back, now the amp faults and
displays "5V ERR." I've not been successful in getting a complete
schematic. If I can get the board number/name and schematic symbol (e.g.,
U1), I can fix this on my own as I did with the 10V reg repair. Requests to
the
>"Until it leaks on the LDMOS devices."
Pure water is an insulator. Leakage becomes a problem when water becomes
contaminated with conductive particles. This rarely occurs in closed loop
systems that use distilled water when non-contaminating hoses, fittings, and
heat exchangers are used. My
>"This includes RemoteRig boxes, the YCCC SO2R Box, the Mortty, etc. None
of them will pass the WKTEST program."
After two years, I gave up. RemoteRig's internal keyer and COM port path
when using N1MM are flat-out awful unless the Internet connection has
extremely low latency and jitter.
>"And I have one that says "RTTY" but it's now a Digital DXCC. I had to
resort to FT8 to work Monaco to get on the Digital Honor Roll, with the
other 330 having been on RTTY."
Just to quickly add my input before the topic is canned.
I'm not enamored with FT8 but just for grins, I conducted an
> "After many years and many stations. I still believe this blows away any
> other remote setup (even though no panadapter)."
After nearly four years of trying many RRC settings, I've given up on the
RRC's CW capability. Periodic RRC firmware updates have been of no help.
It's not the manner
Looking for input from anyone who has successfully installed a
surge-suppression device on a USB port. I am in the process of repairing a
KIO3B board after a recent thunderstorm.
The KIO3B uses an ST Microelectronics USBLC6-2 ESD protection device at the
front end of the K3's USB connector.
>"I believe the KY commands are already able to be utilized by N1MM..."
All good. What I'm referring to is packet-generated characters while using
*paddles*. Instead of dit and dah elements, the keyer interprets paddle
closure and creates an ASCII or similar character.
For example, the
>"If K4 uses a super-set of K3 commands then I assume it would support KY
mode ( ASCII characters transmitted over the CAT interface) for CW. I
think this mode would be a lot better known if it was supported by N1MM+
but, last time I checked, it isn't."
If Elecraft has partnered with
>"Remote control -- The K4 comes with remote-control via Ethernet built in.
One K4 can controlled by another, or by a tablet or PC. Eric must have
demonstrated this 500 times at Dayton and I daresay he's getting good at
it."
Wayne,
Since 2015, N4CC and I have been operating a remote station on
>"Both stations have extensive ground systems that would not be needed if
they were dipoles."
AMBC ground systems would still be needed (unless sited over salt water) to
maximize ground-wave coverage even if they were center-fed vertical dipoles.
The field intensity produced by a ground-mounted,
>"My experience is exactly that; look out for latency; that is the killer."
Apart from use with satellite-based services (e.g., Hughes, maritime VSAT,
etc.), I've found latency is reasonably low even from hotel and 4G
connections. Jitter will almost always be the dominating factor, especially
Has anyone on the list been successful in remoting their KPA1500 over the
Internet using either USB or Ethernet server mode? I've tried both modes,
and no-go. Just getting either host server mode up and active at the remote
site takes perhaps ten tries to finally connect. However, to date I've
Loaded the KPA1500 remote software this evening. Some observations:
1) Cannot run local *and* remote server host simultaneously when using
USB connectivity. I am hoping this limitation can be overcome when I add an
Ethernet cable at the remote site in addition to USB connectivity. Reason?
>"The link will be back soon. We found a few bugs in the remote sw and
temporarily
pulled it from the ftp site. Stay tuned! We'll announce here when it is
back up next week.
Eric /elecraft.com/"
Any further updates on when the KPA1500 Remote Software will become
available for download?
>"Has anyone else experienced this and if so have you found any solutions?"
Easily solved with any low-pass filter on the K3's ANT1 port (EF Johnson,
Nye, Drake, Bencher, countless others). Then use ANT2 for 6m. The
multipole LP filters typically have a sharp cut-off above 35 MHz and
response
Is there any news from Elecraft or a third-party developer concerning
KPA1500 client/server software? Some of us, and likely many more ops, need
the ability to control the amp from a remote desktop without the need of
desktop replication software like TeamViewer and VNC. N4CC and I share his
K9YC:
>"Joe is right and George is WRONG. V- is NOT GROUND, it is the return for
DC power. Bonding V- to ground is a BAD idea -- that's why virtually all
pro-grade power supplies are built either without the bond or so that the
bond can easily be removed."
And from K2VCO:
>"But I keep coming
otherboard
that the PA module and KAT3 plug into. Once that detail was figured out, I
reassembled the K3, leaving only the bottom plate open for the repair.
Paul, W9AC
-Original Message-----
From: Paul Christensen [mailto:w...@arrl.net]
Sent: Sunday, January 21, 2018 7:12 PM
To: 'elecraft@mailm
> "This cable worked for me for several years but recently failed. Bring
some extra jumper coax with you..."
Karin,
Many thanks. I have several extra RG-400 jumpers that can be used as well
as confirming if the issue appears on ANT-2. Schottky diodes arrive
tomorrow, so I'll be ready later
>"From experience, I'd say nearby lightning strikes would be the
culprit."
Highly unlikely. Clear skies for days. No lightning activity here in a long
time here. Two years ago, I had a similar problem with static-damaged Schottky
diodes in an Alpha 9500. Those diodes are used to sample RF
Sent: Sunday, January 21, 2018 1:18 PM
To: 'Paul Christensen' <w...@arrl.net>
Subject: RE: [Elecraft] K3 Power Reading/SWR/ALC Problem
I don't know where purchasing actually buys the parts, but...
D36 and D37 are BAS70INCT Diode, 70V, SOT23, like Digi-Key BAS70INTR-ND
U16 is LM358, DUAL OP
I have a K3 at a remote site about an hour north of my home so
unfortunately, I cannot quickly investigate an issue that's recently
developed. After reviewing the K3 schematics, the root cause is likely
isolated to the following parts on the PA board: D36, D37 (BAS70 - Schottky
directional
n 5. See the KRC2 manual for more information.
If you have questions about the KRC2, just ask! - Jack, W6FB
Elecraft Engineering"
Jack, exactly what I needed. Many thanks!
Paul, W9AC
-Original Message-----
From: Paul Christensen [mailto:w...@arrl.net]
Sent: Sunday, August 13,
I have a need to automatically switch antennas based on the K3's band data.
Is it possible to use the Elecraft KRC2 device with the K3 + RemoteRig? The
K3's RS232 port is already connected to the RemoteRig RRC unit. What is
Elecraft's recommendation to accomplish data splitting between all three
>"If you want a good quality 10 MHz GPSDO, I recommend the one made by Leo
Bodnar M0XER. It was reviewed in QST, June 2016."
Unless the K3S architecture is different than the K3, then frequency, rather
than phase-locking is used from the external frequency source. Phase noise
performance of the
>"Of course, this flexibility comes at a price- The Power Genius is
significantly more expensive than the KPA1500"
And for the majority of users, that's an expensive convenience for the
feature of a transceiver selection switch that I think is best managed
external to the amp. With the growing
Wayne,
Congrats on what looks like a very well-designed amp. I've been waiting on
an amp with these features for a very long time. Of particular interest to
me is your continued use of PIN diode T/R switching. Can you describe SWR
protection to the Rx PIN diodes at the 1.5KW level? I suspect
After studying the K-Pod manual this evening, it's not clear if the device
will work with a K3-Mini? It may seem strange using the K-Pod with a Mini,
but a recent shack change has resulted in the panel being placed on an upper
desk tier.
Paul, W9AC
gt; On May 23, 2016, at 5:13 PM, Paul Christensen <w...@arrl.net> wrote:
>
> Dave,
>
> Correct. I must always initialize Fldigi with my K3. Once
> initialized, it's works fine. If I close it and re-open, initializing is
needed again.
>
> Paul, W9AC
>
>&
ter that works fine with anything else connected to the K3.
Yes, have attempted to save the Fldigi configuration in the pop-up a countless
number of times.
Paul, W9AC
On Mon, May 23, 2016 at 3:13 PM, Paul Christensen <w...@arrl.net
<mailto:w...@arrl.net> > wrote:
Dave,
Correct. I must always initialize Fldigi with my K3. Once initialized,
it's works fine. If I close it and re-open, initializing is needed again.
Paul, W9AC
On Mon, 2016-05-23 at 13:19 -0400, Paul Christensen wrote:
> Jerry,
>
> Thanks for the tip. I'll use a macro
Jerry,
Thanks for the tip. I'll use a macro in Fldigi if there's no simple
solution available.
Paul, W9AC
-Original Message-
From: Jerry Moore [mailto:je...@carolinaheli.com]
Sent: Monday, May 23, 2016 12:13 PM
To: 'Paul Christensen' <w...@arrl.net>; elecraft@mailman.qth.net
S
I have Fldigi configured with a K3 using a .XTML file. No matter how I try
and save the configuration in Fldigi, each PSK session requires
re-initializing under Fldigi's CONFIGURATION> RIG CONTROL setting. I've
already tried checking/unchecking several menu "ticks" including unchecking
"reset
>"Simple thing I'm looking for, Olli...to have a local Perseus SDR track
bi-directionally with the K3/0 Mini, and to connect simultaneously with
N1MM. If the Mini could "look like" a K3, N4PY software could coordinate
everything. I do this now with my Orion II. The RCForb software claims to
when using the K3 Mini
with the RemoteRig RRC. The end result is a rebalancing of receive audio
and sidetone level between speaker and headphones with no addition of
digital noise or other artifacts.
Paul, W9AC
-Original Message-
From: Paul Christensen [mailto:w...@arrl.net]
Sent: S
Since last May, I've been using a K3 Mini with RemoteRig. Apart from one
anomaly, operating the K3 Mini has been a great experience. However, when
using RemoteRig, K3 mini speaker audio is extremely loud and the CW
side-tone is even louder. However, receive audio and side-tone level in
Looking for feedback when using MMTY and either the K3s or K3 w/ the KIO3B
upgrade. My plan is to simplify digital interface cabling by replacing a
MicroHam USB Interface III with the newly released KIO3B boards for the K3. My
assumption is that the KIO3B's USB port will handle both audio and
the whole thing
viable, then we will take a good look at implementing it on all sides.
On Jul 19, 2015, at 12:24 PM, Paul Christensen w...@arrl.net wrote:
This inquiry is directed to both the Elecraft leadership team as well as
K3/K3s owners who may have an interest in native Ethernet
, Paul Christensen w...@arrl.net wrote:
Jack,
All valid points but take note of K9HZ's work as a start. Nevertheless,
let's say native Ethernet control isn't worth the engineering effort. That
should not preclude the integration of RemoteRig as an option into a K3/K3s.
If I didn't care
This inquiry is directed to both the Elecraft leadership team as well as
K3/K3s owners who may have an interest in native Ethernet connectivity. In
searching through the list archives, I noted that some K3 owners had
previously expressed an interest in an Ethernet option - and some owners
have
For those of you running a K3 + RemoteRig station with multiple users, this
may be of interest. Although we could not get the K3 Utility to communicate
with the tower site K3 using RemoteRig's spare COM port, another list member
suggested Win4K3 Suite software. I can report that the software
To: Paul Christensen; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 RemoteRig
I was in Dayton when you sent this and a bit behind my mails. I believe I read
most replies, so I will only answer the ones I do not believe were already
answered (apologies for any duplication):
- Never turn
I am looking at ways to bring back P3 panadapter information over the Internet.
Programs like VNC, Teamviewer, etc. appear to limit screen refresh to about
once per second. That results in a very choppy display that's almost
useless.
Is there a means to bring back near-real-time P3
are opting for simple web cams. The reality is that
options are definitely limited.
Thanks to all for the feedback.
Paul, W9AC
- Original Message -
From: Tom Blahovici tom...@videotron.ca
To: Paul Christensen w...@arrl.net
Cc: Elecraft@mailman.qth.net
Sent: Saturday, February 14
Had a thought - I already own an SDR-IQ with SpecrtaVue software. Tried it
with TeamViewer and it works well. No expensive video capture card needed.
SpectraVue has basic point and click frequency change. Options are not
quite as integrated when compared to the P3, but perfectly adequate
Dean's example is still valid. By placing the CM Choke at the wrong
distance of 20 feet from the tuner, the 3,000 ohm Z presented at the balun
in addition to the extra 20 feet of line can create substantial mismatch
loss (i.e., additional loss due to VSWR). The choke simply adds three feet
This is 41.2 W per foot
and at that level the RG-213 would get very warm and could even melt,
especially if the choke were confined in a small box with no circulation
of
cooling air.
If a balun of like reactance were instead wound in bifilar fashion using two
parallel wires, rather than
It seems that many Hams considered the 4:1 ratio some sort of magic
number,
when all it was intended to do was provide a good transfer between 300
ohms
and 50 ohms.
I just modeled a typical 20m folded twin-lead dipole using 4Nec2 and TLD
software. Had never tried that one before.
The
The down side of the 300 ohm twin lead folded dipole is that 300 ohm twin
lead usually is made from small wire and not mechanically very strong, so it
is not durable for fixed stations with varying weather conditions and the
wire is too small for anything but low power. With either the 300
How does modeling with 450 Ohm window lead work out? That would suggest
a 9:1 balun.
Someone earlier (K2VCO, I believe) cautioned against falling into the trap
of believing that the characteristic Z of the line is always the impedance
actually present at the end of the line. The Z seen at
Vic,
Deja vu -- Seems like we had just discussed this on the AMPS list! In this
case, I'm with you on keeping the balun external to the tuner. That gives
the user an option of installing the balun of their choice immediately after
the tuner, or remotely through a short section of
Better still -- how about a comparison of audio clips between the K3 and a
competing transceiver that is seemingly unaffected by the problem? If not
from this past 160m contest, then perhaps from the forthcoming Stew Perry or
CQ 160m contests.
Paul, W9AC
- Original Message -
From:
Wayne,
For those of us ordering the cap through Mouser or DigiKey, can you reply
with the SMD/SMT cap dimension code (e.g., 0603, 1608, etc.)
Tnx!
Paul, W9AC
- Original Message -
From: Wayne Burdick n...@elecraft.com
To: Elecraft Reflector elecraft@mailman.qth.net
Sent: Sunday,
Like the K3, the Ameritron QSK-5 uses PIN diodes to perform the T/R
function. I hear the same tick from the QSK-5, only louder. Because
there's a relay inside the QSK-5, some ops have come to the conclusion that
the relay is generating the tick. It's not. The relay is used only for
bypass
Note: Elecraft will be offering RemoteRig radio remote control systems
and interface cabling for the K3 on our web site order form shortly.'
Eric,
Any long-terms plans to offer a K3 panel interface (similar to the look of
the KX3) to interface with RemoteRig? Tnx!
Paul, W9AC
Just picked up a TS-590 to evaluate against the K3 and ADAT ADT-200A. First
impression is that build quality and panel layout is exceptional. However,
things that do not bother other ops, bother me a lot. For example, plugging
in headphones into the TS-590 results in audible hiss.
an APF
filter, although it appears to be a form of combined noise-reduction and APF.
Whatever they're doing, the algorithms are very effective.
Paul, W9AC
- Original Message -
From: WILLIS COOKE
To: Paul Christensen ; elecraft@mailman.qth.net
Sent: Wednesday, November 30
An example of how the price of a tuner can grow astronomically with
power level.
At what point does it make more sense to spend the same $$ for antennas
which don't require a tuner?
For some of us where only one HF antenna is feasible, it may make sense to
put all the money in the tuner and
of the
directional coupler accuracy.
Paul, W9AC
- Original Message -
From: Paul Christensen w...@arrl.net
To: elecraft@mailman.qth.net
Sent: Saturday, November 26, 2011 11:04 AM
Subject: Re: [Elecraft] High power tuner
An example of how the price of a tuner can grow astronomically with
power
I was surprised to see this from Alpha, whom I would have expected to know
better.
The identical design (less automated functions) can seen in recent issues of
the ARRL Antenna Book For example, see 20th Ed., pp. 25/15 - 25/19 and
titled High-Power ARRL Antenna Tuner for Balanced or
Google W9CF for an explanation of why a choke balun works and why is
matters not if it's on the input or output of a tuner except for
convience.
What W9CF said was this:
As noted by Roy Lewallen, W7EL,[2] putting a choke balun on the input of an
unbalanced tuner to drive a balanced line is
I would suggest moving the new tuner back into your shack where you can
try
doing a tune with your rig and be able to see what the tuner is actually
doing.
A few well-conducted measurements are worth a thousand expert opinions. As
suggested by Rich, N5ZC, he should consider placement of an
Or even simply replace the antenna with the dummy load to make sure the
tuner actually works remotely. It seems to me that some basic trouble
shooting here might possibly supplant a whole lot of conjecture.
I agree with Dave. Disconnect the coax from the MFJ ATU. Terminate the
line with a
I had the impression that the rise of the Ham-band-only transceiver in
the
1950's and 60's was based on simple economics. It was cheaper to drop
general coverage receive...
Just the opposite, I think. Some of the poorest performing -- and least
expensive receivers provided general
In my opinion, the TL922 MUST be modified with a faster relay, or you must
use PTT, or you
must use a large-ish amount of TX Delay to prevent hot-switching.
Another option to deal with sluggish amp T/R relays involves use of an
external T/R switch like the Ameritron QSK-5, or Array Solutions
For folks not wanting to modify their amps, a solid-state amp buffer can be
placed between the K3 and TL-922. I like the Jackson Harbor Keyall
circuit since it can switch up to 500V AC/DC at several amps and it
optically isolates the K3's switching transistor from the amp.
You can use a ribbon mic with the K3, but be aware that the pattern is
bi-directional, and this model doesn't appear to allow the user to alter the
pattern, unlike say...a poly-directional RCA 77Dx. Side rejection will be
good but the amplitude response from rear-arriving sound will be the
FWIW, I try and use 10 MHz as a last resort for zero-beat. The house is
filled with 10 MHz clocks from various electronic appliances, all of them
being nowhere near WWV accuracy so it can make zero beat adjustments
difficult, depending on the incoming signal strength. However, when I make
a
What are the stability and accuracy of these devices in parts
per billion (10^12)? For 80 bucks you're not going to get a
rubidium or cesium standard
The $80 Trimble Thuderbolts as well as most GPS-DO units will do 10^-12. My
long-term 24 hour average is 10^-13 as reported by KE5FX
Message -
From: Phil Kane k2...@kanafi.org
To: Paul Christensen w...@arrl.net
Sent: Tuesday, June 21, 2011 11:30 AM
Subject: Re: [Elecraft] Suggestions for 10 MHz Signal Source for the K3?
On 6/21/2011 6:49 AM, Paul Christensen wrote:
Locking the GPS-DO is as easy as throwing a tiny
GPS
If an active transformer/buffer is really desired, I recommend staying away
from an op-amp circuit. A single-stage JFET transistor uses fewer parts, is
generally less susceptible to RF, and there's no voltage-divider bias needed
** -- and still have the benefit of a high-Z input and low-Z
Then why not just put a 1 megohm or so resistor in series with the mic
element. I believe the K3 mic input has adequate gain to compensate for
it, and it will keep the crystal (or ceramic) mic element happy.
The KISS principle applies - a resistor is much more simple than an FET
or a
Perhaps, even Elecraft offered a SMD-kit at a price 3 times of the
assembled version, it might not be good enough to earn a reasonable
business profit in view of the possible manpower involved. Perhaps, only
through hole components kits can maintain some profits.
Another issue is the
But don't sell the 703 short.
Dave, my experience with the 703+ was a bit less enjoyable than yours.
Here's why: QSK performance was not only poor, it was down-right
objectionable on the air. The 703+ suffers from extreme dit-shortening
and chirp from T/R synthesizer transitions when in QSK
According to Wayne, Rx performance will be similar to that of the Flex-3000.
With the KX3's QSD down-convert architecture, my guess is that all
performance parameters will be superb, with BDR specs probably well behind
the K3. I'm basing my opinion only on the little information available.
I would like to know if some kind of feedback (maybe complicated)
could bring about a quantum leap in linearity, like sampling the
output of the amp and feeding that back to the K3 to digitally
pre-alter the audio to cancel the distortion going out.
That's exactly the function of adaptive
The electrician, either knowingly or unknowingly, did him a favor by
installing the NEMA 14-30 receptacle. He can now run any amp, including the
Alpha 77 series and older Henrys that use a 120V blower on the neutral.
There are plenty folks who wished they had run 30A, 4-wire service from the
That receptacle contains 120V as well as 240V service. You're all set for
most any commercially-manufactured Part 97 amplifier ever made.
Paul, W9AC
My 240v shack outlet has a NEMA 14-30 socket.
Has anybody encountered this before? It looks like the electrician
thought
I wanted a dryer.
an absolute value null when minimum system SWR is reached.
Paul, W9AC
- Original Message -
From: Lee Buller
To: Paul Christensen ; Elecraft Reflector
Sent: Thursday, May 05, 2011 9:28 AM
Subject: Re: [Elecraft] OT - QST Article
I think you're referring to my article from
I'll be able to say that I knew Eric and Wayne way back when. :=)
I want to make sure they remember me at the time of their IPO.
Paul, W9AC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
1. Will the K3EXREF work straight from the output of an Efratom LPRO-101
or
does it need a TTL square wave output or something else requiring extra
circuitry between the LPRO and the K3?
A 10 MHz sine wave output from the Efratom is fine (+4 dBm to +16 dBm).
2. If the K3EXREF is installed,
I can make or obtain an SMA-SMA cable or if the K3EXREF input is a BNC,
cables are already on hand for that.
The kit includes an SMA panel jack with completed ends. A SMA-to-BNC
between-series adapter is included. I found a piece of RG-316 (RG-174 but
with a Teflon jacket) with a male SMA
The slow flash of the asterisk changes to a steady asterisk upon loss of the
external reference, and presumably when the external reference falls
reasonably outside of level and frequency tolerances. One can confirm the
operation of K3EXREF by unplugging the precision reference and noting a
Those of you considering a GPS-disciplined oscillator for use with the
K3EXREF may be interested in this: I recently purchased two Trimble
Thunderbolts on the surplus market to compare against my HP 58540A and
Brandywine GPS4 units. After several days of testing, I'm retiring the HP
and
.
Paul, W9AC
- Original Message -
From: Joe Subich, W4TV li...@subich.com
To: Paul Christensen w...@arrl.net
Cc: elecraft@mailman.qth.net
Sent: Tuesday, April 05, 2011 10:05 AM
Subject: Re: [Elecraft] K3EXREF and Trimble Thunderbolts
Paul,
3) Power supplies: I like OEM/off-board
Several folks have inquired about the Thunderbolt's $70 price. The big
on-line auction place. Seller name: svcompucycle
Paul, W9AC
- Original Message -
From: Matt Zilmer mzil...@verizon.net
To: Paul Christensen w...@arrl.net
Cc: elecraft@mailman.qth.net
Sent: Tuesday, April 05
I should have added that USD $70 was the offered and accepted price.
Shipping was very fast as well.
- Original Message -
From: Matt Zilmer mzil...@verizon.net
To: Paul Christensen w...@arrl.net
Cc: elecraft@mailman.qth.net
Sent: Tuesday, April 05, 2011 11:40 AM
Subject: Re
1. Any reference oscillator operating at 10 MHz would work with the
K3XREF?
The 10 MHz source should have a signal level between +4 dBm and +16 dBm. For
square wave sources, 2VDC to 3.3VDC peak is optimum. If the source is a 5V
logic level, use a 50-ohm resistor in series with the input.
purposes. I use a second output from the Trimble to phase-lock an ADAT
transceiver.
Paul, W9AC
- Original Message -
From: Paul Christensen w...@arrl.net
To: elecraft@mailman.qth.net
Sent: Tuesday, April 05, 2011 3:36 PM
Subject: Re: [Elecraft] K3EXREF and Trimble Thunderbolts
1. Any
Barry,
You'll either need to look at the key line input section of the schematics
for the two transceivers, or give it a shot. In the past, I've used low
voltage-drop Schottky diodes to steer and isolate two transceivers. I now
use a W8ZR StationPro II (SPII) and no longer have these
If you do modeling, please be aware that the pro's know that all modeling
programs on the planet terribly underestimate ground losses.
Another trap to avoid is thinking that (all other things being equal), more
radials on a vertical will somehow result in better low-angle radiation.
Well, it
In addition to AD5X's excellent work, anyone considering installation of a
43' vertical should first read Owen Duffy's (VK1OD) well-researched
information, especially his information concerning feed-point alternatives:
http://vk1od.net/antenna/multibandunloadedvertical/index.htm
One reason for
Another benefit of the GPS-DO is that routine calibration to ensure
long-term accuracy is the responsibility of the U.S. Department of Defense,
and funded by U.S. tax payers. Unless there's a hardware-related problem
with the GPS-DO, calibration is someone else's problem and expense. The
I installed it on Friday in about 30 minutes, but I'm comfortable with my
way around the K3. I would think that most users could install it in about
an hour or less. Installation is actually very simple with very few parts
involved. K3EXREF came with an SMA connector and SMA to BNC
And the third (which is what made me a lid last night) is that if I
forget I'm in QRQ mode
then SPLIT does not activate.
Don't feel too bad, Vic. I've done that myself. The K3's macros make the
entire split operation so easy that I've become complacent and just assume
I'm on the right Tx
One solution, especially for folks who are in the beginning stages of K3
construction, involves substitution of the SO-239 for a better quality
connector. I used a pair of Amphenol types with a Teflon insulator, but
Phenolic is fine. These were purchased from Mouser, catalog P/N is
I cannot picture how you could spin the CENTER conductor. That would
require twisting the coax attached to the male half.
Sure, it shouldn't happen if the op uses diligence in keeping all connectors
tight. But if the PL-259 becomes loose and ever-so-slightly unmates from
the SO-239, the
One solution, especially for folks who are in the beginning stages of K3
construction, involves
Sorry, meant KPA100 or K3 construction...
Paul, W9AC
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
I am under the impression that the TX DLY setting of 8 msecs does not
actually produce an 8 msec delay between KEY OUT going low and start of
RF.
At the default 8 ms setting of TX DLY, I measure ~ 9 ms of delay in QRQ mode
between the K3's key *input* line and RF. So, I agree that the 8ms
I've also advocated to Elecraft in the past to make available RF delay
settings below 8 ms for those of us who have fast QSK amplifier switching
using vacuum relays or switching diodes. (My homebrew 6m amplifier T-R
speed is well under 4 ms, for example. The new Elecraft amp, I assume,
will
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