Yeah. Mine is in the shop for xmas.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob McGraw K4TAX
Sent: Thursday
Whew! Otherwise we are really screwed on using the K5, K6, and K7...
Dr. William J. Schmidt - K9HZ J68HZ
> On Jan 15, 2020, at 9:42 PM, Keith N6JPA wrote:
>
> Don't worry. I have it on good authority that heaven has a Ham Shack with
> all of the models. Think positive :-)
e and several others
on the reflector.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator North American QRO Group at Groups.IO.
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.q
No issue in FK93lu
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of donov...@starpower.net
Sent: Monday, March 23
ed to be replaced due
to use. Is there any recognition of this with a "replacement fan kit" when
it's time...?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator – North American QRO Group at Groups.IO.
email: b...@wjschmidt.com
-Origin
It may be more efficient for you to contact Rene (the KPA1500 support guy) at
Elecraft and discuss this with him... ??? I doubt anyone in the forum has seen
the schematics or was involved it its development to the point where they could
help you.
-Original Message-
From: elecraft-boun
So I've been here before. Had a bad lightning strike and then put a lot of
effort into constructing a proper commercial grounding system around my
vertical. That part worked very well. What I never expected is that the
next strike would jump over the vertical, over my drive way and follow the
te
The underlying reality is that if you analyze the input-output transfer
function for a linear amplifier with ALC, the resulting transfer function is
not linear. Thus you would expect all sorts of odd behaviors as the function
changes order when ALC engages. Simple math.
Dr. William J
This happened to me too on 40 meters with an antenna that was less than 2:1
SWR. There are a lot of factors that can impact the longevity of the parts
in the amp... over voltage/ over current can happen depending on the
components of the impedance.
-Original Message-
From: elecraft-boun
There isn't really much in the way of smarts on the clone board. It's simply
the tuner elements (coils and capacitors), a few relays, the relay driver
chips, and gas tubes. The actual tuning smarts comes from elsewhere within the
K3. This isn’t much of a stretch for a clone.
-Original M
Wayne is correct here. If you don't use a principled approach to finding
the the best tuning solution, there are excellent binary searches that have
roots in game theory that are extremely good. The optimum is to marry them
both. The most successful commercial (militairy) algroithms start with a
Ideally... yes, practically... no. Given the load impedance and the ideal
impedance, you can always calculate a transfer function that is exact
(simply the path of movement on a Smith chart). However, the question then
becomes how good are your measurements? A high performance line section and
d
I'd try a PGA-103+ as a retrofit... plenty of them around.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Chris Reed
Sent: Sunday, April 21, 2019 6:07 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] XV144 ATF34143 phemt
rter.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Like us on Facebook!
Moderator – North American QR
Well let's start with all of those self-setting watches and wall clocks...
and then the propagation information that is broadcast. Does GPS do that?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch K9ZC
Staunton, Illinois
I just turned on my KPA500 to do some DX work before I have to return home
from J6 tomorrow. We had a hack of a storm two days ago and the antenna was
connected but no lightening was observed. My KPA500 receives fine in
Standby but receive signals seem attenuated by several dB when in Operate.
Th
[[The next time someone challenges me on why I only use BNC and Type N
connectors, I’m going to send them this entire discussion.]]
Unfortunately this is not perfect either. If you use an "N" connector on long
runs of heliax in a cold climate, you must be aware that the coefficients of
expans
Or. imagine using it in a 160 contest...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
email: b
Pin diode rf switches are preferred today. You can even get the QSK-5 kit from
Ameritron if you can't make your own. Good to 2500 watts and infinite speed.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Sta
I have a Chinese version of a Budipole type vertical that uses exactly that...
ribbon cable cut to various resonate lengths for the elevated radials. Four
as I remember. Works very well and quick to deploy and stow.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
I use my KPA1500 for contesting... and it's never hot... but I do worry
about the fans wearing out. At one point I asked Elecraft if they had a
"Fan Kit" for it that I could keep in stock here in the Caribbean just in
case one went south in the middle of a contest...
Dr. Wil
not the problem causing the box to fail).
Evidently this has become common-place.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Wes
Sent: Saturday, March 13, 2
You might try the "K4-Elecraft" group...
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of W0MU Mike Fatchett
Sent: Tuesday, March 30, 2021 3:33 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Where are the K4 reviews?
It is puzzling to see the lack of s
I must have missed that email...?? and I wondered when they would start
taking orders for the upgrades. Anyway take note if you still want K3/K3s
parts before they are gone!
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator North American QRO Group at
Yes. And the salient part of this is that I missed the email about taking
deposits… When did it go out?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator – North American QRO Group at Groups.IO.
email: <mailto:b...@wjschmidt.com
the same length using only the original driven element as being
adjustable.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Joe Subich, W4TV
Sent: Sunday, May 2, 2021 7:42 AM
To
transmits fine. A simple replacement of the four diodes and three (?)
transistors solved the problem. Dirt cheap. You can make these
measurements at the test-points to confirm:
TP2= RX 13.1, TX 0.8
TP4= RX 3.9, TX 13
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
ppropriate
here... Someone with more experience with them can chime in here.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: CUTTER DAVID
Sent: Saturday, June 5, 2021 10:46 AM
To: b...@wjschmidt.com; Ele
arely over $1,000.
That's what's up here... As Rob says in all of his talks... "Any of the
radios in the top 10+ are about the same in performance... you serve
yourself best buying one with the options that suit you". Unless, of
course, you are a performance number chaser...
ransform solution. It’s a DUH if you think about it.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Al Lorona
Sent: Thursday, July 1, 2021 12:09 PM
T
sieves to absorb water.
Dr. William J. Schmidt (one of my Ph.D. is in Chemical Engineering)
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of John Marvin
Sent: Wednesday, July 14, 2021 7:00 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 99.9 % alcohol
methanol, gasoline, natural gasoline (pentane range hydrocarbons), etc.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Steve Hall
Sent: Saturday, July 17, 2021
t; on the board under
with the diodes and you need to check the voltages on those test points.
That will tell you everything you need to know. Will post the voltages when
I find them.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator North American QRO Gro
Here it is. From Elecraft technical support:
Nominally:
TP2= RX 13.1 TX 0.8
TP4= RX 3.9 TX 13
>From Rene Morris at Elecraft (great guy!).
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator North American QRO Group at Groups.IO.
email:
YEP
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Moderator – North American QRO Group at Groups.IO.
email: <mailto:b...@wjschmidt.com> b...@wjschmidt.com
From: Bruce Forsberg
Sent: Saturday, July 24, 2021 11:10 PM
To: b...@wjschmidt.
Virtually anything will work. It doesn't even have to be "sticky". Just
use some heat transfer compound to stick a regular mica square to the
chassis.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
-Original Message-
From
stock for the rest.
>
>
> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
>
> email: b...@wjschmidt.com
>
>
>>> On Nov 26, 2021, at 7:33 PM, David Gilbert wrote:
>>>
>>
>> Both of those reasons are bogus in my opinion.
&g
KIO3B boards, please
sell them to those of us that can repair them and keep them in stock for future
needs.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of
It's definitely a multi-layer board, but the thing is so easily repaired, this
is not necessary.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of jerry
well... and know the
symptoms and fixes.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of David Gilbert
Sent: Saturday, November 27, 2021 11:16 AM
To: ele
replace the TUSB2036 and the USBLC6-2 ESD protection packs.
Your mileage may vary... lightning of course.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Ken K6MR
Professionals use 91% Isopropanol. You can get it at CVS cheap.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of eda...@aya.yale.edu
Sent: Friday, December 31, 2021 2:53 PM
To
n the
driveway (paper and other water damaged goods removed of course) followed by a
good drying (leaf blower). Works fine!
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand
paper and other water damaged goods removed of
course) followed by a good drying (leaf blower). Works fine!
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
--
This email has been checked for viruses by AVG.
https://www.av
points. Now, touching at different phase and amplitudes. What
happens? You know the answer.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Mike Fatchett
Sent: Monday, January 17
else
delt with this?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: <mailto:b...@wjschmidt.com> b...@wjschmidt.com
__
Elecraft mailing list
Home: http://mailman.qth.net/m
Unfortunately, my metering outside of the radio shows only 10.1 amps when the
radio shows 20+ amps. Radio and outboard voltage metering showing 13.0 VDC.
Also shown 6.6A for 5W out. Something is up.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email
5W RF power calibrates fine. The 50W fails. Gonna remove the 100W module
today and see if I have a bad transistor… Difficult to do here on the island…
have not built up my test equipment stash here much more than a DVM and an
antenna analyzer.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK
calibrate the gain at 50W
(fine at 5W) tells me I may have a bad transistor. Ordered a fist full of
transistors... will take the module back to the USA and put it on one of my RF
bench at work to diagnose it further. Also have a spare LPA3 if all else fails.
Dr. William J. Schmidt - K9HZ J
seconds:
https://www.theharpmicshop.com/crystal---ceramic-mic-elements.html
http://www.kenselectronics.com/lists/micpart.htm#Cartridges
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@
a hand full of "authentic Astatic, old stock" the later crystal
replacements... brand-new... from one of the big electronic houses like
Mouser or Digikey (can't remember which one actually). I think they were in
the $28 each...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/
amp and
get it on the air for the contest this weekend? Multiple notes to Elecraft
have gone unanswered.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: <mailto:b...@wjschmidt.com> b...@wjschmi
izing. Changes with heat load. This amp is in the Caribbean and
there is plenty of excess heat and corrosion. (nb. I just replaced the
current sensing resistor in my K3S for the 100W module due to a hair-line
crack... surmise it was heating).
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9H
Correct...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Mike Fatchett
Sent: Thursday, March 3, 2022 6:31 PM
To: elecraft@mailman.qth.net
Subject
During field day, I've seen unwanted leakage change the band on the amp from
another transmitter during the receiving cycle. Another good reason to
hard-wire it.
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Wes
Sent: Wednesday, Ma
sending you coupons for 10-20% off shipping. I found this out using UPS for my
businesses.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Mike
Well there can be a little more to it. With the larger systems there is phasing
circuitry (in the generator or the transfer switch: i have both) to detect and
switch at zero cross-over point for "bumpless" transfer of power. Causes the
least amount of surge and damage.
Dr.
Yeah... I didn't wait. I built my own...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton – J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Like
Ah! Someone gets it!
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner – Operator
Villa Grand Piton - J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
email: b...@wjschmidt.com
the Elecraft
forum instead of the qrp-labs forum? Elecraft and qrp-laps fill different
segments of business and have no overlap in products.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch – K9ZC
Staunton, Illinois
Owner
All of those popular devices have gain more than 15 dB... so there is a pad in
the amp to keep the gain at 15 dB. One would think that a "tweak" will evolve
to modify the pad (and possibly the firmware) to eliminate this bothersome
limit.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK
"The "jury" seems split on touch-screen or manual controls. I suggest this
as a compromise".
Not that I'm a fan either. but one wonders how the staunch touch-screen
negatories cope with ever changing real world like semi-modern (last 15
year+) cell phones (voting booths, car GPS interfaces, e
It's very nature causes the resulting overall transfer function to become
non-linear, leading to distortion and other unwanted by products when active.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brian Denley
Sent: F
Actually, the preferred method is to use a regular "Y" cable and a cable for
the SteppIR's "S26" cable schematic intended specifically for the K3. It can
be found in the Steppir groups.IO file section, or I can send it to you.
Dr. William J. Schmidt - K9HZ J68HZ 8P6H
upgrade kit for some components in that circuit. Contact Elecraft techs
for more info.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun
ot to haul it
back to the states to get it fixed and return before the next group comes in
during January.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
Owner - Operator
Big Signal Ranch - K9ZC
Staunton, Illinois
Owner - Operator
Villa Grand Piton -
ve to failure (all
automated), so im gonna go with “unknown hardware failure under warranty.”
Tech support was available that Friday afternoon and their response was “it
happens”. Good enough for me. Going back.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
The obvious issue is not what the radio sees... It's what can happen on the
other side of the transform. Voltages and currents that no one seems to
care about as long as their radio sees 50 ohms.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
-Ori
I could use one too.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N4ZR
Sent: Friday, July 31, 2020 1:29 PM
To
Yes it is... I just got that msg and put my name/call on the list for one...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On
I'm not as constrained as they are with respect to buying parts (surplus
sources, etc.). I'd settle for a board to build my own in the event of a "no
go" but of course I know that won't happen.
Dr. William J. Schmidt
email: b...@wjschmidt.com
-Original Me
6AU6 - 6CL6 - 6146A trio is a very and associated circuitry produces some of
the lowest distortion products when run at the right conditions (voltages,
etc). Note at 75 watts the 6146 is in its sweet spot.
Dr. William J. Schmidt - K9HZ
email: b...@wjschmidt.com
-Original Message
Always tradeoffs to be made. Boosting 12V volts to 50V means some sort of
converter that can add its own distortion products, plus expense and
additional complexity (read that "reliability") and efficiency. There's no
free lunch here.
Dr. William J. Schmidt - K9HZ J6
the commercial level,
it sounds trivial but that is simply not reality.
Dr. William J. Schmidt - K9HZ J68HZ
email: b...@wjschmidt.com
-Original Message-
From: lmarion [mailto:lmar...@mt.net]
Sent: Monday, September 14, 2020 11:32 AM
To: Dr. William J. Schmidt ; elecraft@mailman
I have a K3 and a K3S at my Caribbean station... I see the same behavior on
my K3S but not on the K3. I've calibrated it several times but have not
diagnosed it past that. I've seen the power vary by as much as 50% at
times.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP
d
by their version of the FCC rules.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
email: <mailto:b...@wjschmidt.com> b...@wjschmidt.com
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This email has been checked for viruses by AVG.
htt
It's nothing
secret... just not publically posted.
Big shout out to Rene at Elecraft... Excellent tech.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Ken K6MR
Sent: Sunday, Februar
Mouser has 15 match pairs in stock today. Thats what you want anyway, not
single devices even though it may not matter. You are paying $6 for the
matching process. VRF2933MP
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: b...@wjschmidt.com
ts, but no replacement cards are available.
I guess we are all going to have to decide what our direction forward will be
when the failure occurs for which there are no parts.
What are others doing? Waiting in line for K4 or moving on to different
vendors?
Anyone have "scrap" K3 or K3s for s
.
If you find a K4 used, it will be a miracle.
Dr. William J. Schmidt - K9HZ J68HZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Jim Brown
Sent: Monday, June 20, 2022 4:31 PM
To: elecraft@mailman.qth.net
Subject: [POSSIBLE SPAM] Re
My K3 failures always come in the form of either K3IOx failures (extremely
common) or the 10W module. Everything else seems to hang together.
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Geert Jan de Groot
Sent: Wednesday, June 22, 2022 3:30 AM
To: elecraft@ma
I actually designed and build a K3IO "ethernet" replacement KIO3 board...before
the USB version was available. I probably have the only "ethernet" K3 on
earth. I may revive that card and replace the ethernet stuff with USB parts
so that I can fix some of these K3's laying around. I think th
radio though a built in
Ethernet line?
73,
Mike Cizek W0VTT
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Dr. William J. Schmidt
Sent: Wednesday, 22 June, 2022 11:40
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [POSSIBLE SPAM] Common K3 failure modes
I'd probably buy
one as a spare.
73,
Dave AB7E
On 6/22/2022 9:40 AM, Dr. William J. Schmidt wrote:
> I actually designed and build a K3IO "ethernet" replacement KIO3
> board...before the USB version was available. I probably have the only
> "ethernet" K
I think it may actually be the other way around... The 60V relay does not
close if 270V is missing?
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Andy Durbin
Sent: Sunday, July 17, 2022 6:49 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500 / 270V ERR
HV
If you check the schematics, the 270V is made/comes from the power supply...
BUT the 60V enable relay (feeds the voltage divider and read on the front
panel) is on the PA board...
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Andy Durbin
Sent: Sunday, July 17, 20
the
gate-source threshold is maximum of 4V. Anyone know what the value of this
thing is before I just stuff in a 4v Zener?
Dr. William J. Schmidt - K9HZ J68HZ
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman
Reverse engineered or just a better/ more modern design? 😊
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Al Lorona
Sent: Tuesday, August 23, 2022 4:06 PM
To: Elecraft Reflector
Subject: [POSSIBLE SPAM] [Elecraft] [K3] KIO3 failure mode
Ah, lightni
Lightning seems to me the topic on all of the groups currently... so we must be
in storm season!
I worked with a guy at Honeywell who was trained in atmospheric discharges in
his graduate work at MIT. I guess Honeywell was looking into survival of
military equipment at the time. He knew I was
cause they are much more
forgiving!
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of j...@kk9a.com
Sent: Sunday, October 30, 2022 10:44 AM
To: ele
pricy though.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
Moderator: Amateur Radio Builders Group at Groups.IO.
email: b...@wjschmidt.com
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of jerry
Sent: Saturday, December 17, 2
I had this same issue with two of my K3s... Failed the calibration. Was
an issue on the 10W board both cases.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Mark Musick
Sent
Replaced the transistors (RD devices)...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
-Original Message-
From: KJ7SOY
Sent: Friday, December 30, 2022 11:26 AM
To: b...@wjschmidt.com
Cc: Mark Musick ; aa...@mac.com; Joe Subich, W4TV
; Elecraft
Same here... it's a requirement at my contest station (to have one) so that we
don't mess with gains and frequencies due to other mics during a contest when
the ops change. Just plug into the back panel "MIC" connector and turn on the
REAR BIAS.
Dr. William J. Schmid
Yes, the K3 can only handle key out of +200 VDC at 5A...
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email: b...@wjschmidt.com
-Original Message
Even the methods in that book are considered sub-standard by the broadcast
industry... The only think that is a sure bet is to completely disconnect your
radio and put it back in the shipping box.
Dr. William J. Schmidt - K9HZ J68HZ
email: b...@wjschmidt.com
-Original Message
You can prepare but you will never be sure.
Static is something else. All of the antennas I design and implement have
GROUNDED elements or static chokes to ground to reduce static to a minimum.
You learn this with experience.
Dr. William J. Schmidt - K9HZ J68HZ
-Original Message-
A bigger concern for attic antennas is the use of "radiation shield" plywood on
the roof of houses build in the last 10 years or so that turn the attic into a
Faraday cage. The single most annoying reason cell phones don't work inside
your houses anymore.
Dr. William J. Schmi
f the breaker box in a
direct strike into a smoldering pile on the floor. My take-away from that is
the only marginally safe place for my expensive radios was as disconnected and
in the shipping boxed in the (faraday) closet in the basement during a storm
(just like an airplane).
Dr. Will
So, just asking do you ever compare what you buy against a competitor's
products?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
VP2EHZ
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
emai
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