Atmospherics can play a big part in intelligibility that no rx can resolve.
On T32C I had what I think would be called whispering galleries: the signal
circled the world a few times filling in gaps with each pass, so all I heard
was a continuous tone. This went on for almost all of a 4 hour sh
Hi Jon
I tried a Hams4Hams 18m pole and I am not strong enough to push it up
vertically. The Spider pole is even heavier, how do you extend the Spider
pole?
73
David
G3UNA
- Original Message -
From: "Jon Kåre Hellan"
To:
Sent: Sunday, September 09, 2012 10:27 AM
Subject: Re: [Elec
It's all about wetting current. On a building site machine design I used
30mA of dc and a level detector to sense when the switch had been pushed and
they lasted years. A few pA from digital circuits is often not enough to
wet precious metal contacts which are open to the ambient. Try cleanin
Typical! Low cost items are often only batch tested and the customer does
the final test.
A second one might have worked perfectly well. It's all about
probabilities.
A cheap device like this is ideal for long term noise monitoring.
David
G3UNA
>I complained to the seller that my adapter wa
My only experience with the FCC exam is at my club here in the UK: we are
one of the few places in the world outside the USA that offers exams on
demand. We had a candidate in from the UAE last week: he made the trip,
added a little site-seeing then flew back. That's dedication.
73
David
G3U
Please forgive this intrusion into the Elecraft reflector, but it is an
issue of international importance (not just Europe) for all radio
amateurs to protect the spectrum from pollution.
The RSGB is about to release the statement below and it would appear
that PLT lobbyists will get their way u
It would be interesting to see a Jetboil cooker combined with a modern
thermopile.
It brings to mind what you would need for a minimalist radio station to
cover a 24 hour field day contest including food, fuel, staying safe and
warm. All good practice for emergency/remote/SOTA operations.
Wha
Hello Jack
Thankfully, I have not been in a real emergency, but one of my prime
directives would be to first establish a stable and exclusive channel,
OK, it might have to change from time to time, but not like a contest
situation. Having established a channel, one of the power-lean digital
m
I'm happy with USPS but you pay the price! Haven't used them for heavy
items like this.
I have also used international mail which is fine *if it is delivered to
a business address* where they automatically bill the VAT to their
account, sign and deliver. If it's to a private address, it can ho
I think it's Thailand where they inspect the radio at the port of entry
and will not allow it in if does not comply. I think most modern
amateur radio transceivers do not comply.
David
G3UNA
On 14/06/2012 14:41, Don Putnick wrote:
> Sounds like someone in the Greek legal system really knows hi
Fred, is your middle name Grommit? What's that? The moon is made of
cheeze? Oh, no..
David
G3UNA
On 08/06/2012 00:02, Fred Jensen wrote:
> On 6/7/2012 3:28 PM, kevinr wrote:
>> 6 x 2 x 0.5 gives 6 cu in. Which is 98 cubic centimeters. at 22.5
>> gm/cc that gives 2212 gms. The going price f
Perhaps unobtainium?
Sorry, just being silly..
David
G3UNA
On 07/06/2012 22:19, Wayne Burdick wrote:
> stan levandowski wrote:
>
>> What a rig!...
> Thanks, Stan. Glad you like it.
>
>
>> I am a violent bug basher who requires at the very least 6 lbs of
>> dead weight
> Alternative: With the
We pay an awful lot of "tax" on imports from the USA
David
G3UNA
On 30/05/2012 19:26, KENT TRIMBLE wrote:
>
> Internet sales are almost universally tax-free which means local
> communities are deprived of revenue crucially needed to maintain quality
> living for their citizens. Every time you th
I expect $ prices to appear as £. I'd rather deal direct, certainly on
high-value items.
David
G3UNA
On 29/05/2012 08:56, Geoffrey Downs wrote:
> It's not necessarily excellent news for the UK. I for one would prefer to
> continue dealing with Elecraft rather than a general amateur radio resell
Nice video and loadsa fun with your QRP set-up inspires me to do more
outdoor stuff, if only it would stop raining here!
73
David
G3UNA
On 20/05/2012 07:02, Rem . wrote:
> Hi,
>
> I've just uploaded a video where Bill, KF6RMK and myself are operating in
> the QRP TTF event.
> Bill is uisng a K1
of my head - I do not have the overload point for the K3 at handy
> reference, so use that as a "for instance" rather than as an absolute
> data point. (also BTW - my "overload" term is technically referred to
> as the "compression" point).
>
> 73,
Would it help the tests to engage the pre-amp? ie make things more
challenging.
David
G3UNA
On 12/05/2012 17:22, Joe Subich, W4TV wrote:
>
> On 5/12/2012 12:17 PM, Ted Bryant wrote:
> > Was v4.51 sent to the 4.50 testers?
>
> Apparently not all (I had to request it).
>
> I've been doing some
I think you've hit the nail on the head: couple your K series to the
internet using a decent outdoor aerial at home. Spend your money for
effective communication and avoid all those nasty emc troubles in hotel
rooms, unless you can poke a wire out of the window. BTW, you probably
need permiss
I wouldn't buy a loop. IF you only have those 3 choices, I would go for
the Buddipole, but I'm sure there must be other choices out there, I
don't like spending a lot of money on antennas unless it offers
something really special. Have you seen the Bravo?
See http://n6bt.com/n6bt-Bravo-dayt
That sounds really cool. How does he make connection?
David
G3UNA
On 11/05/2012 15:47, Mike Markowski wrote:
> Not a portable solution but an interesting story is that a friend here at
> Aberdeen Proving Ground, MD had the same concerns and by chance was assigned a
> top floor room in barracks.
d that the 50-ohm resistor would work even better if
> it was at least a couple wavelengths in the air.
> Art - N4PJ
>
>
> On Thu, May 10, 2012 at 7:30 AM, David Cutter <mailto:d.cut...@ntlworld.com>> wrote:
>
> It will be quiet on receive and quiet on transmit, howev
It will be quiet on receive and quiet on transmit, however much power
you put into it, until it melts, that is. I'd love to know where he
gets his efficiency figures - perhaps you can ask him. Putting steel
washers at each aluminium joint turned me off completely along with the
dinky receivin
All batteries suffer in the cold: you pay dearly for good low
temperature performance. A simple solution is to keep them close to
your body, eg on your trouser waist belt.
I noticed some 4300mAh AA cells, 4 in a pack for £4 in my local market.
I thought I'd research it first just in case they
> to QEX.
>
> 73 Stephen G4SJP
>
> On Wednesday, 9 May 2012, David Cutter wrote:
>
> There are some great resources out there: I'm surprised no-one has
> mentioned the near end-fed QEX articles written by Ron W6WO or
>
> AA5TB http://www.
There are some great resources out there: I'm surprised no-one has
mentioned the near end-fed QEX articles written by Ron W6WO or
AA5TBhttp://www.aa5tb.com/efha.html
or W8JI
http://www.w8ji.com/end-fed_1_2_wave_matching_system_end%20feed.htm
David
G3UNA
___
I would be happy to join a net again, I've just strung up a new aerial and
you might hear me now on 80 or 40m.
David
G3UNA
- Original Message -
From: "Dave Johnson"
To: "elecraft"
Sent: Sunday, April 29, 2012 10:08 AM
Subject: Re: [Elecraft] Elecraft UK_EUlocal net
> Not any more.
Haven't seen it in QST yet, but I've used mine a few times without mishap.
They are a bit noisy when tuning: the mast amplifies the sound quite a bit -
shouldn't be fitted to a wall or chimney joining to your neighbour's. What
is your experience?
David
G3UNA
- Original Message -
Fr
Thanks for the link Hunsdon.
I was a little surprised by the speed of the Morse being sent early on; I
always imagined that on-off keying of spark was relatively slow. I suppose
this was made possible with the rotary spark machine.
Anybody know more on this?
David
G3UNA
- Original Messa
I think RG142 is closer. Specifying that doubles the price, depending on
length. Worth it if you need the power handling and flexibility.
David
G3UNA
- Original Message -
From: "Chuck Shefflette"
To: "Joe Subich, W4TV"
Cc:
Sent: Sunday, April 08, 2012 3:57 PM
Subject: Re: [Elecraf
Try Newark
http://www.newark.com/amphenol-connex/115101-19-12-00/coaxial-cable-assy-rg58-12in-black/dp/25T0737
Amphenol Connex part number 115101-19-12.00
Personally, I prefer lighter cables using LMR100 etc for low power
inter-connections but I can't get into their on-line catalogue.
73
David
On 'problem' frequencies, re-doing the tune soon after the first try has
always brought a better swr for me, but I have no wires amongst branches
which I think means you may be getting hit and miss good tunes.
David
G3UNA
>A quick way to find the best LC combinations manually is to tune them
>
I'm sure Jim Brown will advise you to read his tutorials, but, basically,
keep rf out of the shack.
73
David
G3UNA
> Larry I do RFI engineering. Pacemakers are a lot like avionics relative to
> ham
> radio. The working spectrums for pacemakers, avionics, and ham radios are
> widely
> separate
!
David
G3UNA
> Note that the KX3 also has a jack for a keyer/paddle/handkey/etc. of your
> choice. It can be used simultaneously with the attached paddle, too.
>
> Wayne
> N6KR
>
> On May 23, 2011, at 9:31 PM, David Cutter wrote:
>
>> I agree. I prefer my arm to
I agree. I prefer my arm to lie at 90 to the table and my wrist and fingers
to follow in a straight line for minimum stress, maximum comfort to the
paddle. Rotating the rig 15 would help a lot. But I have another problem
which is that I often operate the tune with my left hand while my right
I suggest you use my pivot idea, it's too much leverage to directly fit the
f/g pole directly into the screw anchor: cut a short length of 3" drain
pipe and cross drill with holes for the pivot near one end. Fix 2 ground
anchors about 4" apart (edge to edge) or closer and fit the metal tube
b
for
cheap, small diameter ones called windbreak steel screw in ground anchor
tube).
Try this one http://www.pozitube.com/poleanchors/ it's very similar, an
update on mine.
73
David
G3UNA
- Original Message -
From: "David Ferrington, M0XDF"
To: "David Cutter&quo
That's surprisingly expensive. I got something similar over here for about
GBP6 each. Mine have a large diameter tube above ground and I use 2 side by
side with a 10mm tube between them to act as a pivot. I use the system to
raise lightweight poles single-handed. Brilliant device.
David
G3U
That's not to say that they didn't try. Unlike manufacturers who only make
linears, Elecraft has a vested interest in making their product line
friendly to all their products and a switcher would have to pass muster
against their own sensitive receiver. So, Elecraft internal standard for
nois
So, complete and large-gap galvanic isolation is all that could save your
hardware, unless you know in time to remove the RS232 plug all together.
Fibre optic coupling sounds favourite, not even a screened cable to conduct
the energy.
David
G3UNA
- Original Message -
From: "R. Kevin S
Is there a filter one could build into the connector shell ? or buy a
plug-in filter in an adaptor?
David
G3UNA
> RC,
>
> Yes, it does sound like you zapped the RS-232 interface in the K3 along
> with the computer. Contact with k3supp...@elecraft.com is in order -
> they can give you your opt
For my education: what is the mark-space ratio to develop optimum even and
odd harmonics? Does this have any merit?
David
G3UNA
> And by the way, the XG1 and XG2 also have more or less square-wave
> output. This is where the harmonics come from that allow them to put
> out a useful signal on h
Hello Ed
I tried adding further attenuators to a low output sig gen several times in
the past and found that the enclosure leakage was higher than the output
signal. My solution was to place the sig gen several feet away in a deep
metal housing with very good coax and then use the attenuators
Hi Joe
Over here I've noticed that whenever "wiring" of any kind is to be
installed, businesses and domestics that I've heard about always employ
qualified electricians. The wiring itself may not need a qualified
electrician but how it is routed and juxtaposed with mains, particularly
when 3-
current out of the mains and therefore
a lot easier to suppress if switching supplies are used.
Sorry for the thread drift, but it's an interesting subject.
David
G3UNA
> On 4/3/2011 3:24 AM, David Cutter wrote:
>> I'm looking forward to a time when all domestic lighting can be r
I'm looking forward to a time when all domestic lighting can be run from a
12V supply at the main switchboard. With led lights progressing as they
are, I can see no reason for continuing to build houses with high voltage ac
for lighting. The wiring will be cheaper and safer and hopefully that
External speakers are better, but a simple reflector makes a big difference:
I use a small cardboard box sitting just to the rear of the loudspeaker
aperture as a reflective surface.
David
G3UNA
> Mike,
>
> That is creative and very nice, but a pair of high efficiency
> (unamplified) speakers
Well, it's NICE that you can see the tongue firmly in my cheek, Jim. I
presume the others on this thread are thinking the same way.
73
David
G3UNA
> On 3/16/2011 11:02 AM, David Cutter wrote:
>> A European model will be required:
>
> It might be NICE to be able to dri
A European model will be required: we don't have the gain restriction you
have, however, we do like stability and putting lots of gain into one box
could be tricky.
David
G3UNA
- Original Message -
From: "Phil Townsend"
To: "Bruce Beford"
Cc:
Sent: Tuesday, March 15, 2011 9:31 PM
S
I wonder if there is any connection with yesterday's CME - just a
coincidence?
David
G3UNA
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Post: mailto:Elecraft@mai
Jim
I like the idea of a battery operated remote tuner and a simple relay
change-over to provide a top-loaded vertical. I'm often bothered by
connecting the antenna feeder into a 1:1 balun and then to the tuner. I've
read that the very large impedance mis-match can lead to large losses in the
I don't recall that from his biography, I'll have to read it again.
Interesting.
David
G3UNA
> Hi Kevin,
>
> Was not Maxwell that condensed the hard to understand original theory.
> Was some his disciples, aka "The Maxwellians," that finished the theory
> in the present form. FitzGerald, Lodge
Thanks Brendan and Jeff with good advice, I've done this myself and it works
well.
However, small generators I have seen do not produce mains-quality sinewave
output: it's more triangular and I just want to know if Elecraft are happy
with their kit running on this sort of supply which is also va
with all and sundry generators that were ever built, but there
might some lore about VA ratings and on/off ratios.
Any advice welcome.
David
G3UNA
> On 2/18/2011 1:05 AM, David Cutter wrote:
>> This is of interest to me, but is there an implication that the K3 +
>> KPA500
>> M
for what a modest computer load looks like
> http://www.flickr.com/photos/bminish/4698934177/
>
> 73
> Brendan EI6IZ
>
> On Fri, 2011-02-18 at 09:05 +, David Cutter wrote:
>> This is of interest to me, but is there an implication that the K3 +
>> KPA500
>> MUST
This is of interest to me, but is there an implication that the K3 + KPA500
MUST have an "advanced inverter technology" generator - providing "stable
power for computers and more" variety of modern generator? Can I not use a
2kVA "legacy generator" without the inverter technology at a third of
I can't speak for other countries, but here in the UK I used 240V +-7%
(223V to 257V) for normal service but for brown to peak I used 240V +-10%
(216 to 264V), which is very rarely seen here. The 264V is used to test
safety trips and the like according to British Standards such as the the
gene
Others have mentioned null steerers that you can buy and are very effective.
If you would rather build one for yourself, see the latest SPRAT (best value
for money radio mag - ever). On pages 6 & 7 of the latest issue 145 is
shown a simple home-build unit called the Plasma Nuller from Pat GW0VM
Craig
I'm most interested in your system and I wonder if you could describe it
further. What size is your loop and do you use a separate phasing unit
before injecting the result into the K3 rx input?
David
G3UNA
> Another possibility you might want to explore is a K9AY loop array, even
> if
Ian
Thanks for running the net, sorry I couldn't stay long but a great pleasure
to work everybody. I started making notes about what folks were using, it
might be useful to make a table of essential parameters, antenna, settings
and such like. I'm quite surprised for instance that my little p
John says he is a casual operator, ie not really interested in contests. I
suggest any additional filters (apart from the General Coverage BPF ) are
probably unnecessary for his style of operating. As I understand it, the
filters are not there to determine the operating receive bandwidth, but
It's very patchy: there are areas of huge clay deposits stretching for miles
and very deep; I've forgotten the geological term for it, but I understand
it was pushed into place by the last ice age; good for low loss low angle
radiation I understand. There are also large areas of sand stone whic
I used a low and bent doublet of 2 x 88ft per section for a while and it
"tuned" up amazingly well on all bands 160 to 10 with the KAT3. As a rule I
like to use multi-band doublets away from any obvious in-band resonances, so
that it doesn't experience very high Z anywhere, so, adding a bit on
>From memory, (ie the regs changed I should check first) over here in Eu we
have working place regulation set at 85dBA as a maximum for continuous 8
hours listening environment, but it is advised (not mandatory till another
3dB) to use some kind of ear protection; then 88dBA for 4 hours, 91dBA f
Lew
Have a look at this simple project. I'm about to build one and support it
with a fishing rod, but your tree will do a good job. Lots of advice in the
article. I've also modelled it at twice the size to cover 160 and it looks
very interesting. It's close to resonant on several bands and
I also put *everything* on a metal tea tray which has the Mohm resistor to
earth. My wrist strap connects to the tea tray. Equi-potential is the
secret. Put the unwrapped packets on the tray with the K3 and unwrap them
onto the tray.
David
G3UNA
> Wear cotton clothing rather than nylon or
Grimeton is planned to be on air Christmas Eve, 24 Dec at 0800 UTC on 17kHz.
http://www.alexander.n.se/transmissions.htm signing SAQ
I remember being woken at 3am by the 500kHz auto-alarm while off Western
Sahara from an SOS in the English Channel. So much for short distance !
David
G3UNA
Perhaps a webinar?
David
G3UNA
> "Buy a radio, attend a quarterly held two or three day class presented by
> the designers on advanced topics?"
>
> IF this would be done, how about for those who don't live in California or
> anyone who can't make the date, "tape" the presentation and sell the DVD
I recall someone on this list predicting this behaviour and said that he
used a tx shift of 50Hz so that he stood out from the crowd to get in first
shout.
David
G3UNA
Guy Olinger said:
It's not NEARLY on frequency. It's EXACTLY ON FREQUENCY. I know what
I'm hearing. I can hear a hertz in
Bert
No offence taken at all, I support what you've just now said, plus, you
wouldn't buy Elecraft if they didn't do the products that you want, whether
American or not. They could be from virtually anywhere in the world and get
our orders.
David
G3UNA
> Hi David, (& others?)
>
> My apologie
Bert, I'm happy to spend my hard-earned $ on a foreign company, ie off our
shores, like many others around the world who are not American.
David
G3UNA
I also like the fact that my dollars went to folks who
> live, work and spend their earnings right here in the USA. I felt that way
> before th
2 points to make:
in the EMC column in RadCom that mains
> borne interference is radiated best on the frequency at which the antenna
> cable is a quarter wave. That explains why my interference is worst on
> 20m,
> since 16ft 6in is just about the length of the run of cable from ground
> level to
"Banned", as in they don't meet emc specs. Not that that stopped a load
getting here in the first place. We have the regs but still need to make an
official complaint on an individual case by case basis to OFCOM.
David
G3UNA
> I'm in the EU and I didn't know that. I'm not sure they have been
I had the same problem with a long earth lead.
David
G3UNA
- Original Message -
From: "Don Wilhelm"
To: "david beckwith"
Cc:
Sent: Thursday, November 25, 2010 2:21 AM
Subject: Re: [Elecraft] PTT stuck? Error?
> Dave,
>
> Put a balun on your antenna.
>
> Seriously, that is likely be
Please stay on the list, guys, this is interesting stuff that I'm sure many
would like to hear more of.
David
G3UNA
> Sorry for being slow to reply.
>
> Oh yes, a coil wound on a core made from "Ferrite" or "Powdered Iron" will
> be a source of IMD products, the culprit being the core. The level
This begs the question or note, that if scanning mode is set up and
monitored by the P3 with the APF engaged, one could see where those very
weak and elusive signals are lurking in the shadows?
David
G3UNA
- Original Message -
From: "Roy Morris"
To:
Sent: Friday, October 29, 2010 1:
But it is for the built version
David
G3UNA
>
> CE Marking is not required for HAM radio kits.
>
> 73, Laurent F6DEX
> --
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mm
Craig
When you say " I typically use the Clifton and the K9AY together for
diversity RX" how do you do that?
David
G3UNA
>I have the Clifton active whip as well as a K9AY, and use both with
> diversity RX. The Clifton is a fine choice as an alternative RX and
> diversity antenna. Note that
My arrangement has them within a few feet, so I will be using a high speed
reed to remove and short the rx antenna.
David
G3UNA
- Original Message -
From: "Bill N3KKM"
To:
Sent: Monday, September 27, 2010 5:59 PM
Subject: [Elecraft] K3 Sub Receiver Antenna
> The K3 manual indicates
Dana
Thanks for showing us this site.
I was particularly interested in the article regarding neuroplasticity
associated with learning Morse code: I thought you might like a note in a
similar vein.
My old friend Stuart Kind G4AYP (sk) was Director of Forensic Science here
in the UK and he wa
I am interested in setting up a remotely controlled station and am interested
in hearing if the P3 (or any panadaptor) can somehow still be used at the home
station.
I'm not yet sure if I will control by radio or by internet, each seem to have
their merits and legal constraints.
73
David
G3
That's a very interesting account. I wonder if anyone who suffers PLT/BPL
et al noise has similar experience.
David
G3UNA
> My P3 came a couple of weeks ago and went together just fine. The
> bands have been bad at my QTH for a long time yet every time I go
> camping they are good. The first
>From your website, Bill, remarking on nasty noises:
"It would be even more useful if there were a database of wideband RFI
signatures"
Perhaps with the wider use of panadapters such a database could be promoted.
Something tells me that PLT would feature in there.
David
G3UNA
Lyle (KK7P) and
I'd be tempted to call it compression (or expansion, depending which part of
the screen is being treated) someone will throw another into the pot no
doubt.
David
G3UNA
Guy -
I'm not sure what you would call it, but the purpose would be to
provide more screen real-estate for the small signal
I cannot believe that a capacitor would actually come unsoldered and fall
off a pcb; it's more likely that it was packed loose for some odd reason and
just happened to drop out when you opened up the box. I've never come
across a component not taking any solder at all having passed thro a solde
It did cross my mind that if you just want to verify, say the elevation
angle and intensity of the main lobe, you could launch a balloon some
wavelengths away carrying a field strength indicator. With everything else
non-metal, the meter could send data via fibre to the ground and make a
measu
inted at the States - a disturbing result if taken to be the
> true performance of the beam.
>
> IMHO "on air " antenna tests need to be repeated many times over a fairly
> long period, preferably with the same stations.
>
> 73,
> Geoff
> GM4ESD
>
>
> Da
I would try a chart recorder in this arrangement; there's no mistaking which
channel is which. Of course use a modern version using pc sound card then
you can squash up or expand the results for examination.
David
G3UNA
> Alas, after years of doing A/B manual coax switch tests, I have given
This brings me nicely to the final bit of the puzzle: say, in a given
location, you want to set up your own personal outdoor lab to make these
measurements comparing various solutions. How do you create a constant
noise source *which will most effectively demonstrate* the performance of
one c
I like measuring things in the lab and doing the calculations, so we can
avoid blowing things up, wasted time and disappointment, but I also like to
put the thing into practice and do relevant measurements in situ.
I'm building yet another current meter (others have grown legs and wondered
off
You might also consider CPC in Preston
David
G3UNA
> Terry Burbidge wrote:
>>
>> Does anyone please have an RS/Farnell/Maplin part no for a replacement K3
>> front headphone socket?
>
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Home: http://mailman.qth.ne
Thanks Phil, you have a great site and I've often referred to it, as I do
the W8JI site.
73
David
G3UNA
> "...I would suggest that you consider using a Reed relay or similar fast
> acting relay to short circuit the external preamp's input during transmit
> periods..."
>
> Take a look at the Om
Perhaps I should look at protecting the K3 subreceiver from the RPA-1, even
on receive mode :-(
I seem to recall Wayne saying the rx input could take 2W although not
recommended !
73
David
G3UNA
>
> The RPA can output well over 1/2 watt, so don't expect it to act like a
> limiter. It makes a
> DC supply is turned off while transmitting.
>
> Of course if diodes are used for protection instead of a relay, the diodes
> could generate Tx harmonics which are then radiated by the Rx antenna.
>
> 73,
>
> Geoff
> GM4ESD
>
> David Cutter write on Saturd
I'm thinking this might also act as a gate to prevent excessive rf getting
into the K3 2nd rx. I'm planning to have a horizontal receive antenna
located adjacent to my vertical transmit antenna for diversity reception. I
was just investigating the ICE196, but this idea might be better.
David
Could the P3 or another sdr/panadaptor be used to do this alignment?
David
G3UNA
- Original Message -
From: "Jim Brown"
To:
Sent: Sunday, August 15, 2010 4:01 PM
Subject: Re: [Elecraft] K-3 Ref Cal adjustment affected 400 hz 8 pole filter
> On Sun, 15 Aug 2010 10:45:53 -0400, k...@a
Hang one element vertical and one horizontal and you'll work the world from
your sea kayak.
David, G3UNA
> Hi all,
> I will be QRV starting from tomorrow with a KX1 within my spare time
> from paddling a sea kayak along the Italian coasts in Calabria and
> Puglia. I'll use my home callsign /I8
A transistor is the fastest fuse on 3 legs, beats a 2-legged fuse any day.
David
G3UNA
> I like to tell the story about a series of tests we did when I worked at
> Fairchild, in
> Silicon Valley. Our little VHF silicon transistors were very expensive,
> and quite
> fragile. We tested many fus
Good advice from you both on battery fusing, particularly in vehicles, but
you've drifted off the subject a little.
Chris W7CTH said:
"Hi, I am ready to apply 12v for the first time to my new K3. "
I would use a current-limited power supply to connect up ANY equipment for
the first time. No fus
You are much better off using the current limiting feature of your dc
supply. A fuse is not fast enough to protect any electronic circuitry.
Strictly speaking a fuse in line is rated to protect the cable in the event
of a short circuit in the rig which would be a very big fuse, far bigger
than
$2200
David
G3UNA
and does anybody have an idea how many dollar$ ?
> Sorry if this was already covered.
>
> A happy K3 owner Rich KC8HMJ
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