Hi Wayne:
I noticed you are using the big Power Poles for the DC HV. I also note the
cable length is listed at 5.5’ and that longer cable lengths will be supported.
I have found that high currents cables can be a PITA. I hope that you are using
high flex welding cables, hopefully the kind with
This Is Likely Why The Navy Is Causing A Massive And Mysterious GPS Outage
In The Western US - The Drive
http://www.thedrive.com/the-war-zone/3865/this-is-likely-why-the-navy-is-cau
sing-a-massive-and-mysterious-gps-outage-in-the-western-us
Fred, AE6QL
There has been much discussion of desoldering techniques. Many express their
praise of various desoldering/soldering machines. However machines have many
negatives starting with the need for a high degree of skill and expense. In
short they are not practical for the once a year project builder.
Councilor: LOL if you are looking for precise information from imprecise data.
Best I can do is a WAG. If you take your ah rating say 36 and multiply by the
battery voltage say 12, we have 432 watt hours. Divide by 2 to account for
efficiency losses and we have 216 wH and finally divide by
Brendon there is no doubt a rework station will make things easier. They do
not replace skill. In fact you can muck things up faster without skill. Also
they are dangerous. Be sure to keep them children as you would a gun.
73
Fred, AE6QL
-Original Message-
From: Elecraft
One way of looking at desoldering it's god's way of punishing you for making
stupid mistakes. Seriously, desoldering is not easy and not easily learned
even if you have a good teacher. Two people trained alike will not do it
alike. It takes lots of patience in personal self-taught learning.
Perhaps it should be called a thermal conductor and electrical insulator but
then some people always complain even if hung with a new rope.
73,
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron
D'Eau Claire
Sent: Saturday, January 30,
The link below is wrong. It should be:
http://www.lutron.com/en-US/Service-Support/Pages/Technical/Design-Selection
Tools/LEDDimmerMatrix.aspx
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jerry
Sent: Monday, January 25, 2016 1:06
True rhombics are hard to rotate. Even harder is finding the space to put
one up in the first place. See what your HOA has to say about it.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ron
D'Eau Claire
Sent: Thursday, December
Richard I have worked with some of the most static sensitive parts in the
world, tunnel diodes. When working for NASA we had to do a failure modes
analysis on any parts that failed. I would say the quality of the ESD
material ranked at the bottom of factors to take into account. Particularly
since
Gentlemen:
That is not a dirty signal. It's very clean with about a 2 KHz wide SSB. The
sidebands are very clean. I'd say you have a beacon or some other intentionally
caused signal. It may be modulated by some grey line effect but the pulses are
consistent as I can tell hearing only 4.
73
Two videos cover the subject:
https://www.youtube.com/watch?v=CkSHtqxKj8o
https://www.youtube.com/watch?v=GqaYWdZ9BlM
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug
Turnbull
Sent: Saturday, January 16, 2016 1:31 PM
To:
Vic:
Sounds like you have some things to check. Joe and others have given good
advice. However I question your overall design. It sounds like you have a
number of mismatches in your system. For instance is the feed point
impedance of your 20M dipole >600 ohms at 40 meters? I think not but that
I would disagree with the use of MOVs at the service entrance unless there are
inductors preceding.
The key words in this discussion are protection systems. There is no one
component or silver bullet that will protect all. The chances are if you take a
direct strike there will be damage so
Hi Gerald:
I have never seen screw caps for mike connectors. Many companies use plastic
(polyethylene) push on caps for protection during shipping. I have seen them
in bulk in my shipping materials catalogs. Also at retail at OSH. I think
the brand was capsco.
73
Fred, AE6QL
-Original
Joe check your schematic and you will see there is both a polyfuse and a
diode in series with the K3 front panel. The 100w PA pulls off its current
ahead of the fuse and diode so using the front panel is not indicative of
the voltage of the current going to power amp. Hang a voltmeter on the APP
Bob:
There are many many reasons why this is an apples to watermelon comparison.
Too many for discussion here. However two thoughts. In general the faster
the processor the 'more' chances of producing RFI. It could be Wayne and the
boys kept the processor speed low to reduce noise. Also in CMOS
Joel:
I'm not sure from your description exactly what your application is and whether
you need gain. For many years I have been using an amplified "one to three
splitter". It is stereo with a male input and three female outputs. The circuit
appears to be six emitter followers, two for each
Hi Rich:
A couple of more things. First do the math. Assuming 20 amps of transmit
current (that's my rig @100 watts output) with a 2 volt drop is 40 watts of
lost energy (not my rig). That also happens to be the power rating of my
soldering iron. To point, something is likely to be getting warm.
Hi Felix:
Don't we all wish we had your problem. One work around would be to put a 3db
pad between your K3 and your amp. That might help your IMD too. Just a
thought.
73
Fred, AE6QL
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On
Joe, I am familiar with Kelvin sensing, otherwise known as 4 wire or remote
sensing. Its advantages are probably outweighed by the risks of misconnecting
and filtering needed for RF environments. With <4 feet of 10 ga wire I don't
see significant voltage drops. I prefer KISS.
73
Fred, AE6QL
the 3500 V B+ wire to the filaments..)
73 de Brian/K3KO
On 10/2/2015 19:54 PM, Fred Townsend wrote:
> Joe, I am familiar with Kelvin sensing, otherwise known as 4 wire or remote
> sensing. Its advantages are probably outweighed by the risks of misconnecting
> and filtering need
, AE6QL
-Original Message-
From: Matt Zilmer [mailto:mzil...@roadrunner.com]
Sent: Sunday, September 27, 2015 9:38 PM
To: Fred Townsend
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Cabela's Specials
Cabela's, Bass Pro, and Harbor Freight sell an ammo case that fits a
KX3 plus a few
Gerry there is NO one size fits all grounding solution. As Don suggests you
are really dealing with four grounding systems. Your RF or rig ground, a
lightning ground, your NEC or house power ground (neutral), and finally the
safety ground (green wire) ground which is really part of the NEC ground.
I just finished my sojourn to Cabela's. I noticed they had a nice plastic
gun case with foam inserts that fit my K3. They have a credit card promotion
which gives $25 off your first purchase which halved the price of the gun
case. They also have equivalent plastic stackable waterproof 50 cal ammo
Ken:
I would add the caveat that not all cells are wide angles like yours. After
maximum power aiming mine (Harbor Freight) are at 25% of rated power within
15 minutes. That makes aiming them almost a full time job.
73
Fred, AE6QL
-Original Message-
From: elecraft-boun...@mailman.qth.net
dds with other >
grounding requirements. For instance you generally want a high > impedance
for RFI issues and a very low impedance for lightning > grounds. One system
defeats the other so they really need to be separate systems. NO, NO, NO,
NO!
[Fred Townsend] Well yes maybe. How
Dick:
Relays? Sure, easy to do. Power relays are often used in many kinds
equipment. They are sometimes called 'contactors'. They are either big and
clunky or small and unreliable. Which kind do you want and what are you
willing to pay?
73
Fred, AE6QL
-Original Message-
From: Elecraft
Wayne:
Will the speaker housing have a place to slide the Powerwrex supply into the
back?
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Friday, September 11, 2015 7:19 PM
To: Mike K2MK
Cc:
Was that measured top to bottom or bottom to top?
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Wayne
Burdick
Sent: Saturday, September 12, 2015 1:37 PM
To: ae...@carolinaheli.com
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3S height
Ethanol and Isopropyl Alcohol are almost as polar as water. That's why they
mix so well with water.
https://en.wikipedia.org/wiki/Solvent
According to its Wikipedia entry, ethanol doesn't even mix well with heavy
oils. Isopropanol is better.
--
David Woolley
Owner K2 06123
On 09/09/15 01:51, Fred
Gentlemen:
Water is not a problem. You want the water to pick up the water because
alcohol is a non-polar solvent meaning it does not pick up the ionic
contamination. The water picks up the ions and alcohol picks up the water.
Conclusion rubbing alcohol containing water works just fine although
Don:
Acetone should NEVER be used in electronic assembles. Acetone causes both
long and short term effects on various components including the PCB. It
effects epoxy, lacquers, paints, and plastics, particularly polystyrenes
where its effects are almost instantaneous. Pour some in a polystyrene
Jack:
A diode is a good idea and sound engineering practice. However if you look
at the FET schematic from the manufacture's data sheet carefully you will
see that the FET has a built in diode. That's why they make such good relay
drivers.
73
Fred, AE6QL
-Original Message-
From: Elecraft
How is that going to work? Are you commanding the radio or talking to
someone? Doesn't seem simple to me.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Richard W. Solomon
Sent: Thursday, September 3, 2015 12:05 PM
To:
Hi Frank:
Just a guess, I really don't know, but Bob Heil has always been quite
supportive of parts requests. Send him an email.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
kg9hfr...@gmail.com
Sent: Wednesday, September 2, 2015
Steve I recommend you get a LiFePO4 charger. The two batteries may occupy
the physical space but they charge differently.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
inventor61 .
Sent: Friday, August 28, 2015 6:52 PM
To:
Jerry 0.707 works if you have a pure sinewave i.e. CW. However modulated
signals, i.e. SSB, are not sinewaves. I think he is looking for a true RMS
reading.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jerry
Moore
Sent: Friday,
Let's stamp out this bad idea. ALWAYS recharge as soon as possible after
use. The further you discharge a battery the more you shorten its useful
lifetime. This is true of all battery technologies. I know you have heard
clueless vendors say you want to completely discharge a battery before
Bob, I wouldn't be too quick to call it silver oxide. Silver chloride and
silver sulfide are more common than silver oxide and all are black and
conductive. One way to tell is silver oxide is removed with heat so a blast
with the heat gun (300C) will make it disappear. (See
Gerald I have seen this box successfully used with a number of rigs. There
are no technical problems. However I do have a tactical problem with power
poles hanging on the outside where they can snag or fall out. I prefer not
to use a rig runner but rather a smaller plug strip on the inside where
Mike You can do the math for path loss. The formulas are well known. Perhaps
less known is the rest of the story. The probe is using its high gain (dish)
antenna, perhaps 20 db. Since it is a dish antenna it must be aimed! The probe
is programmed to aim its antennas periodically since it can
Everyone will develop their own techniques for SMD. After doing thousands,
yes thousands, this is what I use. First, don't drink coffee for three days
before you work. It's called caffeine palsy. It's not compatible with SMDs.
Second, if the tweezers don't draw blood when they contact the flesh,
Jim hits a resonate cord. I do appreciate the League trying to keep costs
down but sometimes you get what you pay for.
Years ago I wrote the author of a QST published construction article
pointing out an error. He sent me his original schematic. QST had redrawn
his schematic using multiple ground
Marc I do RFI for a living. When I purchased my PowerWerx I made sure it was
returnable if I found noise on it. I checked and found everything was well
below published specifications so I retained the supply and have very
successfully used it in the Sierras where there is virtually no man made
Wayne I realize you are a small company but you cast a big shadow. We are like
the six year old that is told he has to wait to Christmas to open the packages.
Can't wait.
73, Fred, AE6QL
-Original Message-
From: Wayne Burdick n...@elecraft.com
Sent: Jun 12, 2015 11:08 AM
To: Udo
I think Wayne has already explained it should always be uppercase.
73
Fred, AE6QL
-Original Message-
From: Rose elecraftcov...@gmail.com
Sent: May 31, 2015 1:50 PM
To: Wayne Burdick n...@elecraft.com, Elecraft Reflector
elecraft@mailman.qth.net, Eric Swartz e...@elecraft.com
Subject:
Sounds like a great idea. That would be a great aid for teaching on the GOTA
station.
73, Fred, AE6QL
-Original Message-
From: Fred Jensen k6...@foothill.net
Sent: May 30, 2015 8:09 PM
To: Elecraft Reflector elecraft@mailman.qth.net
Subject: [Elecraft] P3: VFO Cursors in WF
Would there
-Original Message-
From: James Wilson w4rk...@gmail.com
Sent: May 13, 2015 8:11 AM
To: Elecraft elecraft@mailman.qth.net
Subject: [Elecraft] K3 power switching
A fused crowbar circuit is so easy to build and such
great protection, it should be in every 12 volt (13.8)
supply lead.
I
about that, so considerable current hit the crowbar and destroyed
it! No other damage, so I replaced the thyristor and learned from the
experience. :-)
73,
Alan. G4GNX
-Original Message-
From: Fred Townsend
Sent: Wednesday, May 13, 2015 7:36 AM
To: G4GNX ; Elecraft Reflector
Subject: Re
A longer version of EME? No it stands for Military Amateur Radio Service.
Before fiber optics made overseas calling cheap most US overseas bases had a
MARS station to facilitate phone patches to the dependents. Now they are
mostly an emergency backup or auxiliary.
73
Fred, AE6QL
-Original
Yes Christian. Because of the roofing filters it was necessary to include a
Jacobs Ladder for maintenance.
Also, the dual peddles (as opposed to paddles) double up for ambidextrous QLF
CW.
73, Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On
Niel:
I think electrolytics are a good guess. Also selenium rectifiers but I don't
think that model uses them.
The problem is aluminum electrolytics are not made anymore. You can
substitute polymer electrolytics but while they are electrically
interchangeable they are not form-fit
Graham:
I think what Joe and others have tried to tell you is your power lead
represents a variable and until you properly account for the variable
voltage drop in your power lead comparison is meaningless.
You say power lead appears to be OK. Appears??? How did you come to that
conclusion? If
Lynn:
Probably a bad idea. The so called computer bricks are designed as charge
pumps to drive another power converter. As such they are not necessarily
clean or well regulated.
73, Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lynn
Gary I'd like to 2nd your comments and add a few of my own.
Re tennis balls I add sand and it's easy and cheap.
You can always bore-sight your target but I added a sight to my blaster. Now
I am one shot, one kill.
If I have to shoot very close to my target tree, because of nearby real
estate
Have you looked in Windows 'Device Manager'?
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of James
Bennett
Sent: Wednesday, January 28, 2015 8:32 PM
To: Elecraft Reflector Reflector
Subject: [Elecraft] K3 USB--Serial Names OT, Kinda
Hi folks,
Don and Tony:
Diodes will get the job done but notice the heat sinks on them. They waste a
lot of energy as heat. I also read you have a single charger. I hear no
mention of fusing. Fusing is a good idea but must be done very carefully.
All of these issues are complicated by the placement of the
Wayne all I can say is wow! I knew the K3 was good but I had no idea it was
that much better. Let's hope the other manufactures adopt the most sincere
form of flattery... they copy the K3. After all that benefits all listeners.
My question relates to Matt's use of a battery booster. In theory
I think there is a big difference in flight software. In Boeing airplanes
the pilot is assisted by software. In Airbuses the pilot is allowed to fly
the airplane if the software thinks he/she is qualified. There has been at
least one airbus crash blamed on software and several other questionable
, AE6QL
-Original Message-
From: Phil Hystad [mailto:phys...@mac.com]
Sent: Tuesday, January 13, 2015 8:34 PM
To: Fred Townsend
Cc: Augie Gus Hansen; w7...@cox.net; elecraft@mailman.qth.net
Subject: Re: [Elecraft] W1 versus WM1
A typo that was repeated through the document and made its
Could it be as simple as a typo. Did you compare file dates?
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil
Hystad
Sent: Tuesday, January 13, 2015 4:43 PM
To: Augie Gus Hansen; w7...@cox.net
Cc: elecraft@mailman.qth.net
Subject: Re:
Too late. Ad says all sold out.
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dennis
Griffin
Sent: Sunday, January 11, 2015 3:20 AM
To: elecraft@mailman.qth.net Mailer
Subject: [Elecraft] Tascam US-122MKII $44.95 today only
A little advice from a Yank. Check with Elecraft. There may be free gold
replacement pins for your K3.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ted
G7BQM
Sent: Tuesday, January 06, 2015 12:22 AM
To: elecraft@mailman.qth.net
What is an Internet signal and how would that help?
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dauer,
Edward
Sent: Thursday, January 01, 2015 11:01 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] P3 and Other Windows
It has been awhile since I have worked with the NEC but things haven't
changed that much for single phase. It has never been allowed for the
green/yellow lead to carry load current. Green and neutral must be the same
size as the current carrier even on a 240 circuit. Green and neutral may not
be
Dick:
A few more notes. Outgassing is not a normal occurrence of lead acid
batteries. It occurs when there is substantial overcharge. That is why you
always use a regulator so outgassing doesn't occur. Second SLA stands for
sealed lead acid. These batteries are partially sealed to prevent
Don:
I think there may be a design error here. First clock crystals of the
variety used in the K3 are dollar items in qualities of one. I have bought
them in 1000 piece quantities for 50 cents. They are available from many
vendors. Second the K3 design places a 33pf capacitor (C60) on the high
Jim:
By cable I think you mean USB to RS232 cable. Install the driver that comes
with the converter. Don't expect windows to know about your driver.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim -
KE8G
Sent: Tuesday, November
Not to contradict the expert but in addition to the specified parameters I
would want to know the on resistance (Ron) and the gate threshold voltages
were the same before I would sub.
73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Folks let me set a few things straight. I have designed a few high stability
time bases and I have done the lab work so I am confident of my facts.
First, you never want to use AC or bimetal thermostats for precision oven
heaters because they are inherently noisy and ultimately unstable.
If memory serves me right there is a ICM band between 10 and 11 meters that
would be a logical place for an welder. Assuming they are using a power
oscillator the signal could be quite broad band and unstable just like a
microwave oven. It also sounds like a foreign design. I think a call to
Without sounding my horn too loudly I have servered on IEEE connector
committees and been paid big bucks to solve the production line problems.
Counterfet connectors is too mild a term. There is some real crap out there and
your eyeballs won't be able to detect it. Things like finish and and
There is good reason why power ratings are not stated. Ratings vary by
frequency and particularly by VSWR. Using a tuner may improve the load seen by
the rig but will also increase losses on the antenna side of the tuner. Skin
effect means only the outer 1% of the conductor is passing
in the USA but could get you into trouble in the EU countries.
3.While not specified, eye connectors should be used with brass bolts with flat
and/or lock washers so as not to distort the eye.
Best regards,
Fred Townsend
-Original Message-
From: Peter Pauly ppa...@gmail.com
Sent: Oct 7
Sounds like a job for ghost busters. OK, maybe a bad contact pin. How old is
your K3?
73
Fred, AE6QL
-Original Message-
From: Michael Eberle mtebe...@mchsi.com
Sent: Oct 4, 2014 3:46 PM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] Ghost in my K3?
Ok, I just had something really
OK then I think you have tin pins (not to confused with game a ten pins).
Contact customer service for free replacment pins.
73
Fred
-Original Message-
From: Michael Eberle mtebe...@mchsi.com
Sent: Oct 4, 2014 4:03 PM
To: Fred Townsend fptowns...@earthlink.net, Elecraft@mailman.qth.net
to?
On 10/4/2014 6:13 PM, Fred Townsend wrote:
OK then I think you have tin pins (not to confused with game a ten
pins). Contact customer service for free replacment pins.
73
Fred
-Original Message-
__
Elecraft mailing list
Jeff I doubt you will find any axial leaded part that is good to 500 MHz
because the package inductance will roll off response below 500 MHz. However if
you insist on axial leaded there are any number of 50.1 ohm metal film, axial
leaded parts available from Digikey www.digikey.com. Also
Vic:
Sorry you passed the smoke test. Your mystery components sound like transient
suppressors. They are not needed for normal operation. They are there to
suppress lightning or other power line disturbances. To find out carefully cut
out ZNR12 and clean up any ashes. Then replace the fuse and
power distrubances in the
mean time. Sort of like using the spare tire. Two flats in a row are not likely
to happen.
Fred
-Original Message-
From: Vic, K2VCO k2vco@gmail.com
Sent: Sep 9, 2014 10:59 AM
To: Fred Townsend fptowns...@earthlink.net, Elecraft Reflector
elecraft
George: Not to put too fine a point on it but ZNRs are large and slow moving so
they do have mechanical aspects but more to the point they do NOT have
capacitance, save lead capacitance (a few pf), and do NOT act like zeners. They
are much slower (ms vrs ns). They are NOT transorbs which are
Wayne when you find out the answer to your question I hope you will publish it
to the community. Seems like way low below the standard works because the
repeaters are low pass filtering out the speech going into the decoder.
73
Fred, AE6QL
-Original Message-
From: Wayne Burdick
Sounds like mirror for smoke to me. (Assuming worst case.)
73
Fred, AE6QL
-Original Message-
From: David Cole d...@nk7z.net
Sent: Sep 3, 2014 5:46 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Trade for Elecreaft Equipment...
I have a 12.5 inch diameter, f/6, full thickness, (2.13
Al Lorona wrote:
Here's a dumb question from a person with little thermal engineering
knowledge: As these various heat sinks are being compared, does 1° deg C.
really matter?
As Wayne wrote not a dumb question at all but a highly complex one. Again I
agree with Wayne's answer of
Gary radiation effects do not vary linearly as a function of ambient
temperature and are IMHO, a bigger error factor than anything Don has
mentioned therefore ambient temperature should be stated. Also, again IMHO
thermal resistance is a much better comparison between heatsinks. Ambient temp
Have you refreshed your page?
-Original Message-
From: Joe Subich, W4TV li...@subich.com
Sent: Sep 2, 2014 12:39 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 filter plots
They certainly don't work for me.
73,
... Joe, W4TV
On 2014-09-02 3:28 PM, Thomas R. Houston
Hello Mark:
Question? What is the SWR of a mile long piece of coax if it is unterminated.
Answer 1:1. That is because a long length coax will act as a matching
transformer. Actually it doesn't have to be too long as you found out. If
reading is not better in the shack something is wrong.
Mark
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Jim I agree with Mark but would like to add one thing. Heat is the enemy of the
battery. As Mark says the heat goes up sharply at end of charge. This is how
the smart charger knows the battery is fully charged. If you attempt another
charge when the battery is hot you may damage the cells. This
Ron I have no comments about the KX1. However I do seem to recall the Tek 422
has a 30 MHz bandwidth with a P6006 probe.
73
Fred, AE6QL
-Original Message-
From: wa7...@citlink.net
Sent: Aug 23, 2014 3:50 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] no DDS VFO output/KX1
Hello
Johan:
We know the higher the frequency the less efficient the amplifier /oscillator
so what I think you are seeing is the effect of self heating. 3 degrees c seems
like a reasonable number. I think you will see even more heating in transmit.
That's why an oscillator with a low temperature
Mark I have not seen your problem so I tend to discount your explanation. It
sounds like something is breaking down. Perhaps bad coax, antenna, insulator,
or lightning arrestor. You could test with a TDR (Time Domain Reflectometer) or
Hipot tester. If you lack the equipment connect a dummy
Fred, correcting the subject line might, I say might, affect a few thread
followers. However the other readers will bless your intelligence in changing
as we can delete without opening the file. While we at it why can't the poster
put the proper subject line in the first place? Sometimes I
Fred, I think you mean 1.2 or 1.25v nominal each cell. Jim NiMh don't take heat
well. Sounds like you may have over charged. Did they get hot?
73
Another Fred, AE6QL
-Original Message-
From: Fred Jensen k6...@foothill.net
Sent: Aug 17, 2014 7:34 PM
To: elecraft@mailman.qth.net
Subject:
ESL, Interlogix Hard-Wired Smoke Alarms Recalled Due to Failure to Alert
Consumers of a Fire
Recall Summary
Name of product:
ESL and Interlogix brand 400/500 series smoke detectors manufactured in China.
Hazard:
Radio frequency interference can cause the smoke detectors to fail to alert
Bill I'd like to add a few things to what Don has said. Fortunately the
electronics in your HVAC system is fairly simply and easily shielded. However
when susceptibly problems occur with Japanese designs it can be very difficult
to get them to respond. Let's hope you don't have to go there.
Howard you and Johnny are right. It is not rocket science but it is
thermodynamics. There are many nuances... conduction, radiation, and
convection. Often optimizing for one may diminish another characteristics.
There are many trade-offs. Copper is a better conductor of heat flux than
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It sounds like there may be another fault in your system. Are you hooking up to
any powered external speakers or phones?
73, Fred, AE6QL
-Original Message-
From: Dave Hachadorian k6ll.d...@gmail.com
Sent: Jul 1, 2014 12:28 PM
To: Reflector Elecraft elecraft@mailman.qth.net
Subject:
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