I may be further taking us off topic here but yuppie stands for something =
young urban professional... Most hams aren't young, you cant have antennas
in an urban environment, and when's the last time you say someone wear a
suit to a hamfest? I feel like I am channeling Indigo Montoya here :-P.
turbo encabulator was better.
Matt
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If you can melt solder you can build an elecraft kit, even 'roids are
easier than everyone makes them out to be (though they can be the most
time consuming part of the kitbuilding.)
Matt
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K2 is actually derived from plant fertilizer... the more you know.
(kids are dumb)
Matt
W8ESE
On Tue, May 11, 2010 at 10:08 AM, Al Gulseth wb5...@centurytel.net wrote:
(I thought the readers of this reflector might get a chuckle out of the title
of this article in the local newspaper
Think your better off with a netbook for that kind of stuff, ipad
doesn't have i/o at all, no audio input and a fairly limited
processor, its more of a dumb tablet for web browsing and running
little apps. And for the price, you could pick up 3 netbooks and put
whatever flavor of *nix or windows
W8ESE
On Thu, Apr 29, 2010 at 12:04 PM, Kok Chen c...@mac.com wrote:
On Apr 29, 2010, at 4/29 9:26 AM, Matt Palmer wrote:
... ipad doesn't have i/o at all, no audio input...
You are probably not aware that the iPad's Camera Connection Kit
supports a USB Class Compliant sound card.
73
Switching supply can do much better than 50% efficiency, I've designed
several for use in PA's that are close to 95% efficient. The
dominating inefficiency is usually in the PA
Matt
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Well said tom, an often overlooked aspect is the angle of the
mismatch, load pull is the only way to tell, while a 3:1 resitive is
not to harsh, very few things will survive a 3:1 at an inductive
reactance angle. Load pull is the only way to be sure, and I would be
uncomfortable making any claims
How are you measuring resistance?
Matt
W8ESE
On Wed, Apr 7, 2010 at 6:53 PM, Alan Bloom a...@elecraft.com wrote:
It is important to use an anti-static mat to prevent damage to
electronic devices when working on solid-state equipment. Since
Elecraft is heavily kit-oriented this is a topic
If you need more slots then build a real computer. Shouldn't be too
hard to get a case and a motherboard that will support whatever
processor and ram you have, with more pci/pciE slots to make the
upgrade cheaply.
Matt
W8ESE
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My observation is that the motherboards for desktop/tower
computers are having less and less slots as time goes by.
Most certainly not true, in fact the trend is going the other way,
with some of the newer mobo's designed to support 4x graphics cards in
parallell, they have more slots, all
Foot straps are pretty common , but are useless unless you have
conductive floors (always get in arguments with QA as my lab has non
conductive floors, and they want to get rid of all the chairs without
draggers).
Matt
W8ESE
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most die comes out of shenzen or malaysia. Packages are usually korea,
assembly and testing happens everywhere for components, places like TI
and IR have fabs in the states still, but not all of their parts come
out of them.
Matt
W8ESE
sent from my VIC-20
David, there is no reason they couldn't package it with the PA other
than input source differences. If its a single platform, or use PA, we
will include power conditioning with it. The cases where we dont the
PA is used on multiple platforms and has to run from 1275, 704, 400
cycle, 3 phase etc.
The solder blob method takes a little trick, you have to sit on the
end of the wire long enough for the insulation to melt (heat has to
transfer to the wire). I usually just scrape with a xacto these days
and then tin, I think it is cleaner and easier than solder blob. When
I built my K2 I used a
check here for softrocks.
http://www.kb9yig.com/
they are still in high demand so you may have to check daily to see
when more are added.
Matt
W8ESE
On Tue, Jan 12, 2010 at 9:12 AM, Don Wilhelm w3...@embarqmail.com wrote:
Dean,
The plan for the P3 as I have heard it is to also support the
Anyone else get this mail from the elecraft list? Its spam/scam. Can
the mods do something to plug their holes.
THX.
On Thu, Jan 7, 2010 at 2:14 PM, Rick Klingensmith kling...@gmail.com wrote:
Hi,
Happy new year! How you doing? We made a trip to London (United
Kingdom) unannounced some
know this topic is closed but I would like to point out, I buy stuff
from japan all the time for martial arts (kendo) It is cheaper for me
in the USA to buy stuff from japan than it is for a Japanese person in
japan (significantly so, sometimes as much as 50% cheaper) because I
dont have to pay
Need to learn to count there hector, that number seems a bit high
based on my calculation more like 6-7k. 1 yen roughly equals $0.01. So
not so much. I think you added multiple K3's in there, if you just
added up all the colums. The price is even lower if you dont get
factory built.
Matt
W8ESE
Don,
Gold embrittlement is still a problem, and we have a chem egr dept
that spends a great deal of their time analyzing gold plated parts to
determine if we need to either slim down the gold plate or possible
dip the IC's to avoid these issues.
Matt
W8ESE
Usb can be a noisy thing, there are many reasons you wouldnt want it
inside the radio Not to mention the exercise in writing drivers
alone is herculean.
Matt
W8ESE
On Fri, Nov 20, 2009 at 12:41 PM, Phil Hystad k7...@comcast.net wrote:
Actually, I was confused about the KUSB option. I
while I had access to sophisticated test equipment I built my K2 in a
hotel room with a DMM i got for free from a sales creature and a
norcal smt dummy load kit. I dont think you even need the DMM for the
K2 because it has one built in.
Matt
W8ESE
Such a number is really meaningless to an amateur and without
information on the method in which it was computed.
Matt
W8ESE
On Mon, Oct 26, 2009 at 1:39 PM, rfenab...@gmail.com wrote:
Does anyone know the MTBF of the K3...?
Gary
K3 ser# 679
VK4WT/P
Sent via BlackBerry® from Telstra
Military will always use lead solder, it is the easiest way for wider
pitch parts to self mitigate for tin whiskers.
Matt
W8ESE
心正即刀正
On Wed, Aug 19, 2009 at 6:54 AM, d.cut...@ntlworld.com wrote:
Hi Paul
I think it will soon be impossible to buy any electronic apparatus built
using
ENIG is better but unless its class 3 equipment it doesnt make much
difference
Matt
W8ESE
Former KD8DAO
On Sun, Jul 26, 2009 at 5:00 AM, Brett Howardbr...@livecomputers.com wrote:
I thought the RoHS compliant stuff that Elecraft is doing was all in the
ENIG process. I've ordered a K1
If cost is not an issue, look into A123 battery packs, either thru
buddipole or hfprojects, or you could order cells and roll your own.
Matt
W8ESE
On Fri, Jun 19, 2009 at 7:25 AM, Michael Babineaumbabin...@magma.ca wrote:
John :
Here is a few battery suggestions for your portable K1
I disagree, the experts are always right, its just the people who are
claiming to be an 'expert' are not always so. I hear this in a
commencement speach this year keep a healthy disregard for the
impossible and all engineers should have this. This 'flaw' in
transistor theory only presents itself
I would stay away from early hp digitals, they are nothing but
trouble, just take my word on this one, you are better off with a 2430
(might have dyslexic on the number)
The new digital lunchboxes are nice too, and if you know what you are
doing you have no problems, I attribute the 'old timers'
I dont think SMT is that bad, then again I am young, when I brought
this up to a ham I met at FDIM he told me he is blind in one eye and
has more than 3db on me in age, so there are no excuses, its like mike
fright but with building, just try them sometime. I find smt is easier
to work with than
a external 200-400 watt amp is a fairly trivial design, if you want
one order some parts and get building. You could do this with a couple
813's for pretty low cost, or solid state for a bit more money. I'm
surprised how many people sit on their rear end and complain about
this or that product not
charging state tax, totally bogus IMHO, Hendricks was doing the same
thing, must be a california thing.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On Fri, May 15, 2009 at 8:01 PM, David Wilburn dave.wilb...@verizon.net wrote:
http://n2.nabble.com/K3-or-SDR-5000--td457400.html
I wonder if elecraft actually does thermal and vibrational stress
analysis, I've always been curious what the natural frequency of my K2
is, as well as what the rise from board to chassis is in a 71C
environment :)
Matt
W8ESE
On Wed, May 13, 2009 at 9:16 AM, David Ferrington, M0XDF
Got my KSB2 to the point where I am running the BFO setup for LSB/USB,
i get all the way thru setting the LSB/BF!t frequency, I hit band- to
return to the BFO parameter display, but when i hit mode to change the
mode I am getting an info 230 message, and they K2 kicks me out of the
menu without
Discovered my freq counter probe is intermittent, trying to fix, but
ordered a new one from elecraft just in case, guess i'll have to
shelve the k2 until the new one arrives.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On Sat, May 2, 2009 at 12:14 PM, Matt Palmer kd8...@gmail.com
It looks like I need to unload my second K2 to fund other Ham radio
things (darn this is an expensive hobby)
K2 S/N 4740, including: KAT2 Ant Tuner and KNB2 Noise Blanker
$625 Shipped to US
Matt
W8ESE
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conficker doesnt do anything yet, it has the potential to be a spambot
net, but it hasnt done anything except phone home so far.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On Wed, Apr 8, 2009 at 7:46 AM, David Wilburn dave.wilb...@verizon.net wrote:
There is a very bad bug out
Ahh now you are no longer talking about RF ground but the black art of
EMI. Its not to difficult to determine RF ground, you have to have
very good spatial visualization, the ability to hold the 3D model of
the board, chassis and housing in your head, and you need to think
like an electron. It
I'm a general dummy, but I dont think that simply adding a heater will
do what you want, but then again when i think of stability my brain
usually thinks of 0.5ppb over a 20year life of a radio.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On Thu, Mar 26, 2009 at 1:26 AM, Mike-WE0H
I tried a pair in a bose store and was unimpressed, cant turn the gain
up enough, so I built my own, they are a safety hazard now :)
Matt
W8ESE
On Thu, Mar 19, 2009 at 3:24 PM, Darwin, Keith
keith.dar...@goodrich.com wrote:
A lot of guys here at work have the Bose NC headphones to try to
all you need for a NED is a scr, the more tactful approach is to
characterize the die's response to being irradiated and created
irradiated vs normal models and play it all in simulink, all depends
on how much the customer wants to spend for FEMECA
Matt
W8ESE
Former KD8DAO
If its that big of a deal to you there used to be a product called
'qdope' that was made for this purpose. With some frequencies various
other things can cause havok, though i would believe in LF projects
the effect is negligible.
Matt
W8ESE
Former KD8DAO
http://blog.MattIsKichigai.com
On
I doubt you use actual RTV but a RTV-like sealant. RTV contains acetic
acid and will eat/corrode electronics and is a no-no for mil hardware.
In mil spec hardware I doubt you are winding your own toroids. While
it was common practice to do your own air wound coil knifing, the CMMI
people have
why would you need such a list?
Matt
KD8DAO
http://blog.MattIsKichigai.com
On Mon, Jan 19, 2009 at 9:20 AM, John Shadle sha...@katzenfisch.com wrote:
Is there a list of all the toroids to wind for the K2? I know I could
just thumb through the manual for the basic kit and figure it all out,
A ESD bag and a mat are 2 different animals, a ESD bag (silver)
creates a faraday shield around the object protecting it from esd
(think tinfoil) an esd mat is a relatively high Z conductor designed
to bleed off charge as to avoid arcing (think rub feet on carpet and
touch doornob.) there are also
You mean the S-meter reads in S units (6db) how unique. Also the damn
powerpole thing has been beat to death over numerous threads on this
reflector. Read those and pray no one gets out their soapbox again.
Matt
KD8DAO
http://blog.MattIsKichigai.com
On Thu, Nov 13, 2008 at 10:44 AM, Jan Erik
also have an antenna erected in my apartment, I hope
to meet some of you on the air in the near future. Thanks again to
everyone, I cant wait until I save enough money for my next one
(another K2 or possible K1).
Matt Palmer
KD8DAO
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I hear you can buy them at www.elecraft.com
cheers
Matt
On Fri, Aug 29, 2008 at 9:40 AM, Dan Boardman
[EMAIL PROTECTED] wrote:
Wonder if anyone has an unbuilt KX1 or any of it's accessory kits
unbuilt they would like to sell? Please call Dan at 770-377-6000 or
email me at [EMAIL PROTECTED]
Knowing that you need 2000V or so before you feel it illustraits why
its important to take ESD precautions with sensitive parts, very
recently at work we had an LDMOS device that would be destroyed with
about 30V which means moving your hand in the air near it would cook
it, hence why the use of
I hate to add my 2 cents but as far as a humidifier, you want above 30
percent humidity, an air ionizer would be the next step up after that,
a lot of the larger RF transistors used in my workplace are especially
sensitive, and it is a requirement to run an ionizer to prevent gate
damage.
Matt
On Wed, Apr 2, 2008 at 5:38 PM, David Ferrington, M0XDF
[EMAIL PROTECTED] wrote:
I'm not convinced - I thought ESD packaging is designed to conduct across
its inner surface, therefore preventing the build up of static and charge on
depends on the type of ESD packaging, esd protected or esd
Since building switchers for the military is my profession these days
i would like to think i have some authority on the subject. Failures
can occur almost anywhere in a switcher and the most typical type
depends on the topology of the supply. Typically there is a pass
transistor on the input that
I cant get the bridge null to 0V T1 looks right, and all the various
connectors are fine as far as continuity (less than an ohm) any ideas
what to goto next?
Matt
KD8DAO
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@don and the other guru's
KAT2 is built, however i cant get the 10pin connector to sit on p4 of
the control board, i dont want to force it, (right now i'm pushing
enough to flex the circuit board) is it supposed to sit flush or nott?
Matt
KD8DAO
___
I'm using a linear tech LT4356CDE as shown in their application note
for Demo Circuit (DC) 1018A, to do the same thing, it ends up being
pretty compact. Some people may have issues getting the sense
resistors however.
Matt
KD8DAO
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Is it possible to buy only bare boards from elecraft? I'm thinking
about a KIO2, but i already have all the parts in my junk box, and $90
is alot to spend for something i basically already have.
Matt
KD8DAO
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Building the KAT2, i'm not getting some of the caps bent down very far
on the filter board, does anyone have any pictures of one built with
the newer style teardrop caps instead of npo discs, i'd like a visual
reference to compare to.
Matt
KD8DAO
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main problem with the article is both space programs and military are
exempt from being ROHS compliant, so why would lead free solder be in
a satellite?
Matt
KD8DAO
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Having some minor problems here, mainly the external speaker jack does
not fit the hole in the case, not even close.
Matt
KD8DAO
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@ don and the other guru's, as i was going over the final check on the
k2 RF board, i noticed d39 was not installed and hmm, i seem to have
an extra MV 209... how much trouble am i in?
Matt
KD8DAO
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i was worried about it causing problems with alignments, do i need to
realign the filters then?
Matt KD8DAO
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i seem to be having trouble winding the bifilar transformers t3 on the
k2 and on the KAT t1, i seem to keep coming up with a short some where
in both, any tips?
Matt
KD8DAO
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smaller is also better for RF, surface mount resistors and caps are
much more consistent to manufacture and better for RF due to almost
eliminated stray effects. Also with cheaper comes more accurate,
almost all surface mount resistors are 1% and they are cheaper than
the 5% ones.
Matt
KD8DAO
I hate to say it, but you would think if you spent that amount of
money on a key it wouldn't have a simple problem like that, you would
think they could pop for the extra buck or two and get better feet.
Matt
KD8DAO
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It seems to me the old guys want things to get bigger, i want them
smaller, there is no reason with advances in technology and smaller
components that you cant fit a radio with the performance of the k2
(basic anyway) into an altoids tin, look at the AT-Sprint i think its
a great example of what
Again I invoke the elecraft gods, i dont have a 2sc2166, mine is a
2sc5739, checking the data sheets these are the same except they have
lower voltage, current and power dissapation rating, is this a
documented replacement? I would have expected it to show up in errata
somewhere... Just want to
I would rather see them expanding into a surface mount miniaturized
version of the k2 with improved performance for a k4.
Matt KD8DAO
On 9/6/07, Brett gazdzinski [EMAIL PROTECTED] wrote:
I do wonder what Elecraft could come up with if
size, weight, and power consumption were not an issue.
It
I think we need to get with the times, i'm not saying a smaller box
for the k2, but i wouldnt mind seeing a surface mount version, which
would mean more space inside the box for user mods and tinkering, i
think with all the options installed everyone agrees the k2 is a tight
fit. And as much as
On page 69 of the current manual it says c125 is a 22uF
electrolytic, all i have left is a 2.2uF is this something for errata?
Matt
KD8DAO
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seems i accidently put the 22u into c106, will swapping this out
affect anything major (ie will i have to redo any of the alignment
that has been done thusfar) did having this cap here hurt anything?
I'm trying to trace the schematic but cannot find this cap.
Matt
KD8DAO
At Don and others, when reading the manual it instructs you to install
R3, R4 and R5 but not to confuse R5 with R6, is R6 supposed to be
installed in this step as well, browsing through the manual i cannoth
find any other direction to install R6.
Thanks,
Matt
KD8DAO
probably just a little paranoia on my part but:
on the K2 c133 is listed in the manual as a 104 (.1) and states to
bend it down, however the 104's are short and the pad is too large for
this cap, is this still the correct capacitor.
Thanks
Matt
KD8DAO
I figured i would poll the peanut gallery, assuming in my next two
weeks where i have nothing better to do i can finish the K2 and get it
aligned quickly, I should have some extra pocket change, what is the
logical next step, auto-tuner or SSB board? (SSB will be used for psk
only)? All comments,
I use the kester pocket packs for soldering, (not kester solder
however) when it goes empty i simply rewind my spool on an
appropriately sized marker, and then refill the pack, I frequently
hold the plastic pack in my teeth whilst holding a component and a
iron.
Matt
KD8DAO
On 8/1/07, [EMAIL
In response to the solder comments i'd like to contribute my $0.02 :
IDM, As long as the solder is not on the prohibited list it doesn't
matter. There I said it, everyone proceed to gasp and freak out. I'm
still working on my K2 slowly, and have now used more than 6 different
kinds of solder
I would take ruby over java but would like to mention one you missed,
tcl which is also very portable.
Matt
KD8DAO
On 7/26/07, Rob Lundahl [EMAIL PROTECTED] wrote:
Have you considered Java? Totally portable across systems.
Or even Ruby which is a 1 click install on windows and is free.
Ruby is
Has anyone bough parts from www.danssmallpartsandkits.net? Any
comments on the experience?
Matt KD8DAO
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Looks like phishing to me (bad grammar is key)
Matt
KD8DAO
On 7/21/07, John Palmar [EMAIL PROTECTED] wrote:
My virus protection sends me the following message every to send an email. Do
you know anything about this?
*** PLEASE DO NOT REPLY TO THIS NOTIFICATION. ***
Trend Micro PC-calling
for anyone who is interested playing with the new digicam while
building my k2, i'll upload new photos as i take them.
http://picasaweb.google.com/KD8DAO/K2Build
Matt
KD8DAO
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responses
I am using a Metcal RF soldering iron with a 037 tip and am building the
board in compliance with JSTD 001D Class 3)
Thanks a bunch.
Matt Palmer
KD8DAO
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A metcal 037 tip is 700 deg F. I'm using some kester 60/40 solder I had
laying about(pocketpak), not sure of actual part number. In regards to my
plating question, from a commercial production standpoint, if gold plating
is too thick on a part, it tends to cause cracking in a solder joint in
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