Re: [Elecraft] laptop power supply to power KX3

[Fred Townsend]

Jeff, caution.  Laptop power external supplies are designed to be followed
by precision internal regulators that handle the logic voltages and charging
the battery. The external supplies are not well regulated and can be quite
noisy.  They may not be the best supplies for ham rigs.
73
Fred, AE6QL

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jeff Herr
Sent: Monday, September 17, 2012 6:40 PM
To: 'Elecraft Reflector'
Subject: [Elecraft] laptop power supply to power KX3

While at work I went through our stock of power supplies for the various
makes of laptops we use.
I found that Toshiba supplies are specified 15v and ranged in current
capability from 2.5 amps and up.

Dell, Lenovo, HP, Acer, Asus all use 19v supplies.

Those Toshiba supplies are very small.

WW6L


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Re: [Elecraft] [KX3] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[N5GE]

HIGH SPEED RADIO OPERATOR, US ARMY NATIONAL GUARD,
WHOSE SHOULDER PATCH WAS THE AMERICAN INDIAN SWASTICA UNTIL HITLER
DEFAMED IT BY KILLING MILLIONS OF PEOPLE UNDER IT ON HIS FLAG.

THE SHOULDER PATCH IS NOW THE THUNDERBIRD.

ANCHORS AWAY AND SEMPER FI!

NNN0KYN NAVMARCORMARS

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member

On Mon, 17 Sep 2012 20:21:03 -0700, Keith Heimbold
 wrote:

>No problem here. Go Navy! Have a fun time! I will listen for you!
>
>Keith 
>AG6AZ
>(ex-ET2 nuke on USS Enterprise)
>
>Sent from my iPhone please excuse typos
>
>On Sep 17, 2012, at 7:54 PM, "stan levandowski"  wrote:
>
>> 
>>  ...which is why we are *not* using the SLATER's amateur radio callsign 
>> of WW2DEM (World War 2 Destroyer Escort Museum) or her QSL cards.
>> 
>> This is a QRP event using the SLATER'S maritime antennas and a 1X1 call 
>> of K2N.  We have some fun, call attention to a historic ship, and call 
>> attention to QRP ham radio operations all at the same time.  And we made 
>> up our own QSL card.
>> 
>> Exactly as advertised on qrzed dot com under K2N - "truth in 
>> advertising"
>> 
>> Where's the problem?
>> 
>> 73,
>> Stan / WB2LQF
>> ex-RM2, USN
>> USS BOXER (LPH-4)
>> 
>> On Mon, Sep 17, 2012 at 10:07 PM, Mike Morrow wrote:
>> 
>>> We'll be operating three (3) KX3s from Radio Central aboard the 
>> historic
>>> USS SLATER (DE-766) on Wednesday 19 September, from 1600 UTC to 2400 
>>> UTC.
>> 
>> Historic the ship is, but ham radio operating from it is *not*, unless 
>> the
>> authentic original naval communications equipment is being demonstrated.
>> 
>> 73,
>> Mike / KK5F
>> ex-LCDR, USN
>> SSBN-629
>> 
>> __._,_.___
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Re: [Elecraft] KX3 and P3 ?

[Wayne Burdick]

Nothing yet, but it's definitely on our future product list.

73,
Wayne
N6KR


On Sep 17, 2012, at 6:25 PM, W0FK wrote:

>
> wayne burdick wrote
>>
>> It's highly likely that we'll design an adapter to allow the KX3 to
>> work with the P3.
>>
>> 73,
>> Wayne
>> N6KR
>>
>>
>
> Any update on a KX3-P3 adapter?
>
> 73,
>
> Lou, W0FK
>
>
>
> -
> St. Louis, MO
> K3 #2513, P3 #620, KX3 #0036
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/KX3-and-P3-tp6892826p7562879.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] [KX3] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[Keith Heimbold]

No problem here. Go Navy! Have a fun time! I will listen for you!

Keith 
AG6AZ
(ex-ET2 nuke on USS Enterprise)

Sent from my iPhone please excuse typos

On Sep 17, 2012, at 7:54 PM, "stan levandowski"  wrote:

> 
>  ...which is why we are *not* using the SLATER's amateur radio callsign 
> of WW2DEM (World War 2 Destroyer Escort Museum) or her QSL cards.
> 
> This is a QRP event using the SLATER'S maritime antennas and a 1X1 call 
> of K2N.  We have some fun, call attention to a historic ship, and call 
> attention to QRP ham radio operations all at the same time.  And we made 
> up our own QSL card.
> 
> Exactly as advertised on qrzed dot com under K2N - "truth in 
> advertising"
> 
> Where's the problem?
> 
> 73,
> Stan / WB2LQF
> ex-RM2, USN
> USS BOXER (LPH-4)
> 
> On Mon, Sep 17, 2012 at 10:07 PM, Mike Morrow wrote:
> 
>> We'll be operating three (3) KX3s from Radio Central aboard the 
> historic
>> USS SLATER (DE-766) on Wednesday 19 September, from 1600 UTC to 2400 
>> UTC.
> 
> Historic the ship is, but ham radio operating from it is *not*, unless 
> the
> authentic original naval communications equipment is being demonstrated.
> 
> 73,
> Mike / KK5F
> ex-LCDR, USN
> SSBN-629
> 
> __._,_.___
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> 
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> 
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> 
>  
> Switch to: Text-Only 
> 
>  
> , Daily Digest 
>  
> • Unsubscribe 
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Re: [Elecraft] [KX3] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[stan levandowski]

  ...which is why we are *not* using the SLATER's amateur radio callsign 
of WW2DEM (World War 2 Destroyer Escort Museum) or her QSL cards.

This is a QRP event using the SLATER'S maritime antennas and a 1X1 call 
of K2N.  We have some fun, call attention to a historic ship, and call 
attention to QRP ham radio operations all at the same time.  And we made 
up our own QSL card.

Exactly as advertised on qrzed dot com under K2N - "truth in 
advertising"

Where's the problem?

73,
Stan / WB2LQF
ex-RM2, USN
USS BOXER (LPH-4)

On Mon, Sep 17, 2012 at 10:07 PM, Mike Morrow wrote:

> We'll be operating three (3) KX3s from Radio Central aboard the 
historic
> USS SLATER (DE-766) on Wednesday 19 September, from 1600 UTC to 2400 
> UTC.

Historic the ship is, but ham radio operating from it is *not*, unless 
the
authentic original naval communications equipment is being demonstrated.

73,
Mike / KK5F
ex-LCDR, USN
SSBN-629

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Re: [Elecraft] [KX3] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[Fred Jensen]

On 9/17/2012 7:07 PM, Mike Morrow wrote:

> Historic the ship is, but ham radio operating from it is *not*, unless the
> authentic original naval communications equipment is being demonstrated.
>
> 73,
> Mike / KK5F
> ex-LCDR, USN
> SSBN-629

All this time I have been under a false understanding?  I know there are 
no ex-Marines, once one always one.  I also thought that applied to the 
USN.  Thanks for your service

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org


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Re: [Elecraft] [KX3] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[Mike Morrow]

> We'll be operating three (3) KX3s from Radio Central aboard the historic 
> USS SLATER (DE-766) on Wednesday 19 September, from 1600 UTC to 2400 UTC.

Historic the ship is, but ham radio operating from it is *not*, unless the
authentic original naval communications equipment is being demonstrated.

73,
Mike / KK5F
ex-LCDR, USN
SSBN-629
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[Elecraft] KX3 - Reminder - Special Event Station K2N on Wednesday 19 September

[stan levandowski]

We'll be operating three (3) KX3s from Radio Central aboard the historic 
USS SLATER (DE-766) on Wednesday 19 September, from 1600 UTC to 2400 
UTC.

We're calling it the "QRP CW DE-Xpedition".

Full details, participants, frequencies, QSL info are under callsign K2N 
at qrzed dot com.

We'll be using the SLATER's authentically restored shipboard antennas - 
one KX3 connected to an 80 foot vertical on the starboard side for 20 
meters; one KX3 connected to a 70' vertical on the port side for 17 
meters, and one KX3 connected to a 190' long wire running amidships to 
the fantail for 40 meters.  Our counterpoise is a 1200 ton warship 
sitting in the Hudson River at the Port of Albany, New York.

An unexpected surprise was to have Piero Begali ship us four 
pre-production "Adventure" paddles to put through their paces - two dual 
lever iambic versions; two single lever mono versions.

I've had the mono version here at my shack for a few days now, for 
*practice* ;) Sorry but no pictures and no product review from me. 
It's not my place.

Let me just say this:  "WOW-- its graceful lines, its creative design, 
its diminunitive size, its sturdy construction, its crisp action, its 
Begali feel.WOW!"

It's going to be very,very difficult to say "goodbye" to this 
"KX3-friendly" paddle on Wednesday night.

On Thursday morning, I will begin siphoning off dog food money and 
grocery money so I'll be ready to purchase one when they go into 
production!

Hope to work many of you on Wednesday,

73, Stan WB2LQF
www.wb2lqf.com 
K1#2994  K2# 6980  K3#5244  KX1 #2411  KX3#0325 
K9#1 (Cocoa the Chihuahua)


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[Elecraft] laptop power supply to power KX3

[Jeff Herr]

While at work I went through our stock of power supplies for the various
makes of laptops we use.
I found that Toshiba supplies are specified 15v and ranged in current
capability from 2.5 amps and up.

Dell, Lenovo, HP, Acer, Asus all use 19v supplies.

Those Toshiba supplies are very small.

WW6L


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Re: [Elecraft] KX3 and P3 ?

[W0FK]

wayne burdick wrote
> 
> It's highly likely that we'll design an adapter to allow the KX3 to  
> work with the P3.
> 
> 73,
> Wayne
> N6KR
> 
> 

Any update on a KX3-P3 adapter?

73,

Lou, W0FK



-
St. Louis, MO
K3 #2513, P3 #620, KX3 #0036
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KX3-and-P3-tp6892826p7562879.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] Mini Modules for sale - AF 1 SOLD

[NZ8J]

The AF1 has been sold. I still have the W1 wattmeter, I'll sell it for
$110 shipped.
Thanks
Tim
NZ8J



I have two mini modules for sale that I thought I would list here before
offering them elsewhere.

Both are in excellent condition and both come with the W8FGU's
aftermarket Plexiglas enclosures and manuals, NO power cords (but they
will operate from internal 9vdc battery if you install one)

Non smoking environment

W1 Wattmeter with enclosure, manuals, and W1 serial cable - $125 shipped
in the US

AF1 Active audio filter with enclosure, manual - $75 shipped in the US

Prefer Paypal but will accept US postal money order

I have pictures for those interested.
Thanks 
Tim
NZ8J
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Re: [Elecraft] Soldering stations available

[Gregory Beat]

> These soldering stations (listed) have been SOLD, or SPOKEN FOR and awaiting 
> payment.
> 
> Hakko 936-12 Station - SOLD
> Weller WD1002 Station - Awaiting funds
==
> I still have replacement hand pieces (irons) the Weller TCP and EC series and 
> perform Weller TCP series restoration work.
> 
> Routine Weller repair parts (heaters, barrel nuts, magnetic switches, temp 
> sensors) can be readily ordered from over 50 Weller distributors/Internet 
> retailers in North America.
> 
> Weller's Repair Facility in Apex, NC performs warranty and out of warranty 
> service work for their hand pieces (irons) and soldering stations.  Pricing 
> outlined in this sheet:
> http://www.apexhandtools.com/weller/PDFs/Weller%20Repair%20Center%20Pricing%20Policy%201-2010.pdf
> 
> Weller Tech Notes for troubleshooting and repair of older Weller models can 
> be found at BAMA Mirror.  These are scans or original PDF from my document 
> library.
==
> Queries can be directed to:  w9gb at arrl dot net
==
> For the Economical Builder, repaired Weller W-TCP stations (circa 1965-1970), 
> black Bakelite with side terminals will be listed in a few weeks.

> Greg
> w9gb

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Re: [Elecraft] [KX3] KXPD3

[Thomas Horsten]

Hi Robert,

I posted two updates, one just after I got the KXPD3 upgrade kit and
another after I'd used it for a couple of days. These were posted on the
KX3 group (join if you are not there already, most of the KX3 talk goes on
there). Anyway, for those of you who haven't seen it, I'm copying the two
updates below:

Hi all,

I received the field tester upgrade kit this morning. It took about 10
minutes to install. The only problem was the size of the screw hole in the
PCB was a bit tight, but I didn't need to drill as long as I carefully
tightened each of the mounting bolts one turn at a time (this is a known
problem and will be fixed in the final version).

The kit consists of a new PCB with stainless steel fixed contacts, new
contact screws with rounded ends, and two alternative springs to choose
from with lower tension than the original.

I selected the lowest tension spring and set the contact spacing at three
quarters of a turn from the inner (fully closed) position.

The paddles feel completely different. I tried sending some of the text
from the upgrade instructions and didn't have a single missed dit or dah,
and both the spring resistance and the crispness of the action is improved
by an order of magnitude. I wouldn't say it rivals my Begali Sculpture but
it is much closer to that feel than it was before.

Now I just hope it stays that way, I guess with a portable rig, dirt on the
contacts will be a bigger issue than for a home key, but out of the box, no
complaints at all, thanks to everyone at Elecraft, you've done a great job.

I did a video of my upgrade, but unfortunately my phone ran out of memory
after 5 minutes, so the most interesting bits didn't get recorded. Maybe
I'll post it anyway just to show the unboxing and the kit content.

WX for the weekend is looking like we're in for a bit of Indian summer,
with full sunshine and 27C, so I hope I'll be able to get some outdoor
operating done with the KX3, maybe a WFF activation on Sunday. I'll report
back after a while and see how it goes.

73, Thomas M0TRN


After posting my first impressions just after the upgrade, I've used the
upgraded KXPD3 for several real QSO's and I wanted to give an update.

My KXPD3 already had the PCB mod performed which had greatly reduced the
intermittent contact problem. So I didn't expect the upgrade to make that
huge a difference (only compared to the unmodified PCB which was pretty
horrid in this respect).

But I actually find that the upgrade kit does far more than that. It takes
the key and transforms it from a sub-Bencher feel to a near-Begali feel.

To get reliable operation on the paddles before, the contact spacing needed
to be over 1mm. I think the main reason was the shape of the end of the
contact screws. Per the suggestions previously made on this list, I'd tried
filing down the ends of the contact screws to get them more rounded, but I
hadn't done a very good job at it. The new contact screws are stainless
steel and already rounded from the factory. Also the contact posts are now
stainless steel as well. Finally, the spring tension was too high for
comfortable operation at a very low spacing.

So the spacing needed to be at least 1mm or so for the key to be workable.

It's probably down to a combination of all the upgraded materials,
including the lower tension contact spring, but the key works perfectly now
with sub-mm contact spacing. I am using a spacing of about 0.3-0.5mm, which
corresponds to about three quarters of a turn of the contact screws, and
have locked them in that position. This, in combination with the lowest
tension spring, gives an unsurpassed feel that I have only before
experienced in my Begali Sculpture.

I can now send clean code at 35 WPM with these paddles, something that was
unthinkable before. Although most of my QSO's are at 25 WPM, it is nice to
be able to send QRQ when the opportunity is there, and that's now possible
with the KXPD3.

The only thing I am missing slightly is individual tension adjustment of
the left and right paddle. Since I use paddles with my left hand (but in a
default configuration with dits on the left), I tend to use my Sculpture
with a slightly higher spring tension in the left paddle. But in such a
tiny key I wouldn't expect that.

In short it's now a paddle that works extremely well and where the
"precision" label is 100% justified. To be honest I thought that  was
stretching it a bit in the original incarnation of the KXPD3.

73, Thomas M0TRN


On 18 September 2012 00:26, Robert Vargas (KP4Y)  wrote:

> How did field testing of the KXPD3 paddle upgrade turn out? I'm about to
> pull the trigger but want to make sure that the reported glitches have been
> taken care of. I just heard one report around here and it was favorable.
> How would the improved KXPD3 paddle compare to a Begali Traveler?
>
> 73s,
> Robert-KP4Y
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[Elecraft] [KX3] KXPD3

[Robert Vargas (KP4Y)]

How did field testing of the KXPD3 paddle upgrade turn out? I'm about to pull 
the trigger but want to make sure that the reported glitches have been taken 
care of. I just heard one report around here and it was favorable. How would 
the improved KXPD3 paddle compare to a Begali Traveler?

73s,
Robert-KP4Y
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[Elecraft] KX3 a teacher for the K3...

[Phil Townsend]

The KX3 has really helped me learn the ins and outs of the K3.

The K3, I was able to run it and make contacts but it is such a large body of 
work it has taken me along time to "get it".

The KX3 for some reason really helped to put the K3 into perspective. Really 
helped... s

Would I buy a KX3 to learn the K3?

Sure...

But then I think the KX3 it so cool, It simply had to be designed and built in 
Calif. Santa Cruz no less...


Phil
If you don't know what it is... Don't poke it...
Santa Fe


K5SSR
K2 sold (sorry I sold it)
K3 4636
KX1 2664
KX3 1695

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[Elecraft] KX1 for sale

[John Ronan]

Hi All,

I have the following for sale an assembled
KX1
KXAT1
KXDP1

plus an un-assembled KXB3080

Looking for approximately 300 Euro or 250GBP (plus shipping). I'll be 
bringing it over to Newark Hamfest in the UK in in 11 days time.

Regards
John
EI7IG



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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Jim Brown]

On 9/17/2012 10:33 AM, Fred Townsend wrote:
> Personally I don't want a 75 ohm cable in the shack where I might use it on
> my Ant 3 (K3) connection where it will make a difference. Each to his own.

There are times when 75 ohm cable is preferred, regardless of the rated 
load impedance of the rig or power amp.  A high dipole (as a fraction of 
a wavelength) is a closer match to 75 ohm cable than to 50 ohm cable. 
Excess loss in the coax due to mismatch is determined by the match 
between the antenna and the line, NOT between the rig and the coax, 
although some matching may be required at the rig to keep the output 
stage happy and transfer full power to the load. In addition, because 
the current in 75 ohm coax is one third lower for the same transmit 
power as in 50 ohm coax, 75 ohm coax of equivalent size and construction 
typically has a bit less loss than 50 ohm coax. The 80/75M band has a 
bandwidth of nearly 10%, so 75 ohm coax provides lower SWR on a high 
dipole over a greater bandwidth.

Yes, it's wise to be aware of cable impedance so that we're not 
generating mismatches by inserting cable of the wrong impedance, but 
don't throw the baby out with the bathwater. :)  I use mostly 50 ohm 
coax, but have at least 300 ft of Belden 8213 feeding my two high 80/40 
dipoles, and several resonant lengths of CATV hard line feeding my 20M 
and 15M yagis.

There are also some really neat broadband matching tricks that one can 
play with resonant lengths of 75 ohm cable. I'll be talking about that 
at Pacificon Antenna Forum next month.

73, Jim K9YC
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Re: [Elecraft] KPA500

[Ron D'Eau Claire]

Bad AUX cable connection between the KPA500 and the K3 is the most likely.
Broken wire, damaged pin, etc. 

73, Ron AC7AC

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil LaMarche
Sent: Monday, September 17, 2012 11:56 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KPA500

My station was unhooked for over a month recovering from a flood (Debby).
Hooked back up, working fine except that the 500 isn't tracking the K3 when
changing bands.  What should I look for?  Thanks

 

Phil

 

Philip LaMarche

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[Elecraft] KPA500

[Phil LaMarche]

My station was unhooked for over a month recovering from a flood (Debby).
Hooked back up, working fine except that the 500 isn't tracking the K3 when
changing bands.  What should I look for?  Thanks

 

Phil

 

Philip LaMarche

 

 

727-944-3226

727-510-5038 Cell 

   www.w9dvm.com

  WWW.FLAMGROUP.COM

 

K3 # 1605

KPA500 # 029

P3 #1480

 

 CCA 98-00827

CRA 1701

W9DVM

 

 

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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Fred Townsend]

The cable you reference is built with RG59 (75 ohm) which should put to bed
the question of whether the application must use 50 ohm.
Personally I don't want a 75 ohm cable in the shack where I might use it on
my Ant 3 (K3) connection where it will make a difference. Each to his own.
73
Fred, AE6QL

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Hachadorian
Sent: Monday, September 17, 2012 9:00 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

I just bought this one, and it works fine.  I wiggled it like crazy, and
there's no sign of flakiness:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180881244661&ssPageNa
me=ADME:L:OU:US:3160


Dave Hachadorian, K6LL
Big Bear Lake, California






































. 

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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Joel Black]

Well, to throw you all "out of whack," I used the 93ohm cable. There is 
no dielectric between the pin and shield.  My micrometer will not get in 
that space very well, but it appears that the diameter is ~1.20mm.  I 
have not noticed any "squirrely" problems so I'll keep it there for now.

Thanks again.

73,
Joel - W4JBB

On 9/17/2012 6:52 AM, David Moes wrote:
> Yes there is a difference. But according to Amphenol spec sheet, "Two
> distinct types of 75 Ω BNC's are available, and both mate with each
> other and with 50 Ω BNC's. the difference is in the dielectric
> This I doubt will be an issue at IF frequency.
>
> This is also backed up in the highly reliable Wikipedia article on BNC ;-)
>
> On 9/16/2012 11:11 PM, Alan Bloom wrote:
>> Yes, the cable impedance does not matter but the connectors do.  The
>> 75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
>> smaller pin.  They might not make reliable connections with the 50-ohm
>> sockets on the K3 and P3.
>>
>> Go ahead and try it, but if the connections seem flakey you should get a
>> real 50-ohm cable.
>>
>> Alan N1AL
>>
>>
>> On Sat, 2012-09-15 at 17:21 -0700, Jim Brown wrote:
>>> On 9/15/2012 5:01 PM, Vic K2VCO wrote:
 Just try one of the non-50-ohm cables and see if it works
>>> Cable impedance absolutely does not matter for such a short run at the
>>> IF frequency.
>>>
>>> 73, Jim K9YC
>>> __
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>>>
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[Elecraft] MIL-STD 348B BNC Dimensions

[Jack Smith]

MIL-STD 348B (3 Feb 2009 edition) contains the reference dimensions for 
RF connectors meeting US military specifications.

The center pin diameter for 50 and 75 ohm BNC male connectors are 
defined in figures 16 and 85 respectively. In both drawings, dimension 
"D" is the pin diameter and is (min) 0.052" [1.32mm] / (max) 0.054" 
[1.37mm] diameter in both Figures 16 and 85.

In the absence of definitive information to the contrary, this should 
remove any doubt that 50 and 75 ohm BNC center pin diameters are 
identical, at least if they are made according to MIL-STD 348B.

Some offshore manufacturers seem to regard specifications are advisory, 
not mandatory, of course.

Jack K8ZOA

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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Dave Hachadorian]

I just bought this one, and it works fine.  I wiggled it like 
crazy, and there's no sign of flakiness:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=180881244661&ssPageName=ADME:L:OU:US:3160


Dave Hachadorian, K6LL
Big Bear Lake, California






































. 

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[Elecraft] Li ion Battery info

[Phil Townsend]

http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

Sent from my iPad
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Re: [Elecraft] kX3 and L ion battery

[Phil Townsend]

Charging Lion batteries to only about 90 percent of capacity will help to 
extend the life of same. Likewise do not totally discharge Lions. Unlike nicads.
Nicads like to be stored in a discharged state. Lion like to be stored in a 
charged state. 

Phil
Santa Fe
k5SSR


Sent from my iPad

On Sep 17, 2012, at 7:44 AM, Ignacy  wrote:

> The regular Li-Ion charge to 4.2V per cell so it is 12.6V max for 3 and 16.8V
> for 4. I use 12.6V but get full power only for the first 30% of charge. May
> be a bit better if a series diode in KX3 is removed that adds about 0.6V
> drop. One can charge the 4 cell Li-Ion battery to 15V only, for less charge.
> There may still be weight gains compared to LiFePO3.
> Ignacy
> 
> 
> 
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/kX3-and-L-ion-battery-tp7562763p7562864.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] kX3 and L ion battery

[Ignacy]

The regular Li-Ion charge to 4.2V per cell so it is 12.6V max for 3 and 16.8V
for 4. I use 12.6V but get full power only for the first 30% of charge. May
be a bit better if a series diode in KX3 is removed that adds about 0.6V
drop. One can charge the 4 cell Li-Ion battery to 15V only, for less charge.
There may still be weight gains compared to LiFePO3.
Ignacy



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/kX3-and-L-ion-battery-tp7562763p7562864.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] QRP DXCC

[David Moes]

Congratulations  good work.

You definitely  have more patience than me.I have tried to resist 
the temptation of cranking the power and usually fail.   I find that 
after some time calling QRP my fingers find their way to the power knob 
and its  back to full power.  I will take your good work as inspiration.

73 Dave VE3DVY

On 9/15/2012 8:22 PM, Joe K2UF wrote:
> Just worked Demark for my 100th country using 1 watt from my K3.   Now
> Elecraft can send my new KAT500 anytime,  I'm ready to be heard a little
> earlier in the pileups.  ;o)
>
>   
>
> With a little more respect for the QRPP folks
>
>   
>
> 73  Joe K2UF
>
>   
>
> No trees were harmed in the sending of this e-mail; however, many electrons
> were inconvenienced.
>
>   
>
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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[David Moes]

Yes there is a difference. But according to Amphenol spec sheet, "Two 
distinct types of 75 Ω BNC's are available, and both mate with each 
other and with 50 Ω BNC's. the difference is in the dielectric
This I doubt will be an issue at IF frequency.

This is also backed up in the highly reliable Wikipedia article on BNC ;-)

On 9/16/2012 11:11 PM, Alan Bloom wrote:
> Yes, the cable impedance does not matter but the connectors do.  The
> 75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
> smaller pin.  They might not make reliable connections with the 50-ohm
> sockets on the K3 and P3.
>
> Go ahead and try it, but if the connections seem flakey you should get a
> real 50-ohm cable.
>
> Alan N1AL
>
>
> On Sat, 2012-09-15 at 17:21 -0700, Jim Brown wrote:
>> On 9/15/2012 5:01 PM, Vic K2VCO wrote:
>>> Just try one of the non-50-ohm cables and see if it works
>> Cable impedance absolutely does not matter for such a short run at the
>> IF frequency.
>>
>> 73, Jim K9YC
>> __
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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Jack Smith]

Sent a correction out 30 minutes ago but have not seen it yet. Too early 
in the morning to get all the numbers out of my fingers onto the keyboard.

Paragraph should read:

50 and 75 ohm N connectors are not mechanically compatible as the center
pins are different diameter--50 ohm has larger pin diameter. Over time,
a 50 ohm N male connector can damage the 75 ohm female N and a 75 ohm N
male may not make reliable contact with the 50 ohm female N.

On 9/17/2012 6:10 AM, Jack Smith wrote:
> 50 and 75 ohm N connectors are not mechanically compatible as the center
> pins are different diameter--50 ohm has larger pin diameter. Over time,
> a 50 ohm N male connector can damage the 50 ohm female N and a 75 ohm N
> male may not make reliable contact with the 75 ohm female N.

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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Jack Smith]

Error in sentence ... should say "over time a 50 ohm N male connector 
can damage a 75 ohm female N connector and a 75 ohm N male may not make 
reliable contact with the 50 ohm female."

Too early in the morning.

Jack K8ZOA


On 9/17/2012 6:10 AM, Jack Smith wrote:
> There seems to be confusion over 50/75 ohm connector mechanical
> compatibility.
>
> 50 and 75 ohm N connectors are not mechanically compatible as the center
> pins are different diameter--50 ohm has larger pin diameter. Over time,
> a 50 ohm N male connector can damage the 50 ohm female N and a 75 ohm N
> male may not make reliable contact with the 75 ohm female N.
>
> However, everything I can find in terms of published dimensions,
> specifications and measured diameters says that BNC pins are of
> identical diameter in 50 and 75 ohm variants. The difference in
> impedance seems to be handled in the dielectric dimensions and material.
>
> Many HP 75 ohm BNC connectors, for example, have no plastic dielectric
> at all in the female version--the center socket fingers have nothing
> supporting them but air.
>
> It may be that in "ye olde days" of the early 1940's when the BNC was
> invented pin diameters differed, but if that was the case then, it seems
> to have vanished in the last few decades.
>
> Jack K8ZOA
>
>
> On 9/17/2012 4:19 AM, David Cutter wrote:
>> Wrong use of 75/50 ohm cables is a cause of unreliability on scopes: they're
>> made for 75ohm connectors and if you plug in a 50ohm plug is will eventually
>> splay the centre contact and cause intermittency.
>>
>> David
>> G3UNA
>>
>> Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
>>
>>
>>> Yes, the cable impedance does not matter but the connectors do.  The
>>> 75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
>>> smaller pin.  They might not make reliable connections with the 50-ohm
>>> sockets on the K3 and P3.
>>>
>>> Go ahead and try it, but if the connections seem flakey you should get a
>>> real 50-ohm cable.
>>>
>>> Alan N1AL
>>>
>>>
>>> On Sat, 2012-09-15 at 17:21 -0700, Jim Brown wrote:
 On 9/15/2012 5:01 PM, Vic K2VCO wrote:
> Just try one of the non-50-ohm cables and see if it works
 Cable impedance absolutely does not matter for such a short run at the
 IF frequency.

 73, Jim K9YC

>> __
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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[Jack Smith]

There seems to be confusion over 50/75 ohm connector mechanical 
compatibility.

50 and 75 ohm N connectors are not mechanically compatible as the center 
pins are different diameter--50 ohm has larger pin diameter. Over time, 
a 50 ohm N male connector can damage the 50 ohm female N and a 75 ohm N 
male may not make reliable contact with the 75 ohm female N.

However, everything I can find in terms of published dimensions, 
specifications and measured diameters says that BNC pins are of 
identical diameter in 50 and 75 ohm variants. The difference in 
impedance seems to be handled in the dielectric dimensions and material.

Many HP 75 ohm BNC connectors, for example, have no plastic dielectric 
at all in the female version--the center socket fingers have nothing 
supporting them but air.

It may be that in "ye olde days" of the early 1940's when the BNC was 
invented pin diameters differed, but if that was the case then, it seems 
to have vanished in the last few decades.

Jack K8ZOA


On 9/17/2012 4:19 AM, David Cutter wrote:
> Wrong use of 75/50 ohm cables is a cause of unreliability on scopes: they're
> made for 75ohm connectors and if you plug in a 50ohm plug is will eventually
> splay the centre contact and cause intermittency.
>
> David
> G3UNA
>
> Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
>
>
>> Yes, the cable impedance does not matter but the connectors do.  The
>> 75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
>> smaller pin.  They might not make reliable connections with the 50-ohm
>> sockets on the K3 and P3.
>>
>> Go ahead and try it, but if the connections seem flakey you should get a
>> real 50-ohm cable.
>>
>> Alan N1AL
>>
>>
>> On Sat, 2012-09-15 at 17:21 -0700, Jim Brown wrote:
>>> On 9/15/2012 5:01 PM, Vic K2VCO wrote:
 Just try one of the non-50-ohm cables and see if it works
>>> Cable impedance absolutely does not matter for such a short run at the
>>> IF frequency.
>>>
>>> 73, Jim K9YC
>>>
> __
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[Elecraft] [K3] Internal 2m module

[Kjeld Holm]

Dear Elecrafters,

 

Tnx to all who responded.

 

Your/my conclusion was that I needed also K144RFLK that locks the
transverter to the TCXO in the K3 for stability on CW and SSB.

 

Best regards

OZ1CCM Kjeld

 

 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm
Sent: 15. september 2012 11:57
To: elecraft@mailman.qth.net
Subject: [Elecraft] [K3] Internal 2m module

 

Dear Elecrafter,

 

 

Now I am ready to order the internal 2m module for my K3 with subreceiver. I
have the FM filter and the KXV3A plus KTCXO3-1  TCXO  (0.5 ppm typ) High
Stability Ref. Osc.

 

 

Anything else I should order in relation to this?

 

 

Best regards

 

OZ1CCM Kjeld

 

 

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Re: [Elecraft] [K3] [P3] IF Out / IF In Cable

[David Cutter]

Wrong use of 75/50 ohm cables is a cause of unreliability on scopes: they're 
made for 75ohm connectors and if you plug in a 50ohm plug is will eventually 
splay the centre contact and cause intermittency.

David
G3UNA

Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable


> Yes, the cable impedance does not matter but the connectors do.  The
> 75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
> smaller pin.  They might not make reliable connections with the 50-ohm
> sockets on the K3 and P3.
>
> Go ahead and try it, but if the connections seem flakey you should get a
> real 50-ohm cable.
>
> Alan N1AL
>
>
> On Sat, 2012-09-15 at 17:21 -0700, Jim Brown wrote:
>> On 9/15/2012 5:01 PM, Vic K2VCO wrote:
>> > Just try one of the non-50-ohm cables and see if it works
>>
>> Cable impedance absolutely does not matter for such a short run at the
>> IF frequency.
>>
>> 73, Jim K9YC
>> 
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