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
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
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
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
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
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
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
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
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
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Sent from my iPad
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Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post:
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?ViewItemitem=180881244661ssPageName=ADME:L:OU:US:3160
Dave Hachadorian, K6LL
Big Bear Lake, California
.
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)
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
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
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
http://www.w9dvm.com/
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
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
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
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
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,
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
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
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.
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:
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
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
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.
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
...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
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 sjl...@optonline.net wrote:
...which is why we are *not* using the SLATER's amateur radio
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,
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
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