It's been this way since the first ham hooked a radio up to a windows
serial port.
It's not a radio issue it's an computer issue. Linux does it too.
I reboot my computers once a week whether they need it or not. Same with
the radiosthey just get turned back on when the computer is up at a
Maybe the TX inhibit function can help in this case.
You don't have to modify your settings in your radio or modify the computer.
http://www.kl7uw.com/TX-INHIBIT.htm
73,
Thomas DM7TN
-Original-Nachricht-
Betreff: Re: [Elecraft] K3 and VB6
Datum: Mon, 13 Oct 2014 16:00:38 +0200
Von:
Folks - political comments on the Elecraft reflector are inappropriate and are
prohibited. Please take that part of the discussion elsewhere.
This part of the thread is now closed.
Eric
List Moderator
elecraft.com
---
Sent from my iPhone 5S
On Oct 12, 2014, at 1:55 PM, Tom Fitzgerald via
On Sun,10/12/2014 6:32 PM, Acbross via Elecraft wrote:
Don't know where anyone got the idea that BNCs made for RG-8x we 75 ohm. I
worked in the tv industry for many years and we used hundreds of BNCs that were
made specifically for 75 ohm video. By the way, RG-59 not RG-79.
While you are
Thanks Jim
I was going to ask that exact question. For the amateur world, does it
make a difference if a 75 ohm connector is installed on a 50 ohm feedline.
You made it very clear for everyone. Thanks!
Mike va3mw
On Mon, Oct 13, 2014 at 12:15 PM, Jim Brown j...@audiosystemsgroup.com
wrote:
Jim,
It may not make a difference to performance on HF but it does matter
because the centre pins have different diameters of solder pot / crimp
barrel to match the cable impedance used. Also incorrectly mated
connectors risk damage to their centre connectors by forcing the
engagement. Use
Peter
The larger concern is that most of us have no way of being able to tell the
difference from a 50 ohm bnc to a 75 ohm bnc. We buy these online and at
flee markets, which is part of the reality.
Is there an easy way to tell them apart?
I assume the same is also true for N connectors which
On Mon,10/13/2014 9:30 AM, Peter Torry wrote:
It may not make a difference to performance on HF but it does matter
because the centre pins have different diameters of solder pot / crimp
barrel to match the cable impedance used.
What matters is that the connector match the physical dimensions
On Mon 13 Oct Jim Brown wrote:
the o.d. of the male tip. Although I have not studied the mechanical
Standard for 75 ohm BNCs, I would VERY surprised if the dimensions of
a proper 75 ohm connector would prevent it from mating with a proper
50 ohm connector. Have you studied such a spec? I'm
YES The 75 ohm series are UG-260/U connectors, the 50 ohm series is
the UG-88/U. If they don't have this stamped into the rear barrel of
the connector, THEY ARE Counterfeits or JUST PLAIN TRASH!
There is a lot of crap parts available at hamfests these days! Be
careful what you buy!!
The big difference of the 75 and 50 ohm connectors is the fit of the
connectors to the coax size, NOT the center pin size which is the same.
BNC connectors are really NOT constant impedance especially at VHF/UHF
frequencies like proper N series connectors are. This makes no
difference
On Mon,10/13/2014 10:34 AM, Rick M0LEP wrote:
especially if you're dealing with cheap plugs and sockets.
From my work on the AES Standards Committee Working Group on
Connectors, I can tell you that junk and even counterfeit connectors are
the problem, not the nominal Zo. Junk connectors of
OS X doesn't do it.
Rick
K6LE
On Mon, Oct 13, 2014 at 7:00 AM, Kevin Stover kevin.sto...@mediacombb.net
wrote:
It's been this way since the first ham hooked a radio up to a windows
serial port.
It's not a radio issue it's an computer issue. Linux does it too.
I reboot my computers once a
Jim -
Good quality BNC connectors can be had from Amphenol and AMP. I
normally use AMP crimp-type connectors for BNC applications, have
_never_ had one fail, and I purchase them by the hundreds. Takes only a
few seconds to install one. One other good supplier of RF connectors
is Kings.
I think exercise is the wrong term.
You're talking about hardware (the serial port) and how it behaves
before it is initialized.
Saying that the OS has anything to do with how a port behaves before the
OS boots is a bit questionable.
It's possible that Apple's hardware behaves consistently
While you are entirely correct that there are 75 ohm and 50 ohm BNCs,
the difference DOES NOT MATTER at HF, because the connector is such a
small fraction of a wavelength and the difference is small.
I disagree ... *DO NOT MIX 75 and 50 Ohm connectors*. 50 Ohm male
connectors will split the
Although I have not studied the mechanical Standard for 75 ohm BNCs,
I would VERY surprised if the dimensions of a proper 75 ohm connector
would prevent it from mating with a proper 50 ohm connector. Have you
studied such a spec?
Yes, I have used both in the TV stations - 50 Ohm for RF
I was wondering if there is any kind of sensibility check done on the
input reference?
For example, I've been fooling around with a double oven controlled XO.
Starting from cold it is 200Hz off. It takes ten minutes or so to be
within 10 Hz. It gets into the tenths of Hz accuracy region in
I am having problems getting MMTTY to transmitproperly using K3 with a
Signalink USB interface.
Currently, when I go to TX in MMTTY, I get red TXlight on Signalink, a red TX
light on K3, I hear diddles coming out of theSignalink rear monitor jack, and
I seemovement on Vu meter in Windows
It happens after the BIOS hands off to the OS, it is OS specific.
The easiest fix is turn the radio on after the OS has started.
On 10/13/2014 1:23 PM, Lynn W. Taylor, WB6UUT wrote:
I think exercise is the wrong term.
You're talking about hardware (the serial port) and how it behaves
before
According to the specs in the RF Industires catalog, pages 7 and 14 in
the version I have here, the center pins of 50 ohm and 75 ohm BNC's
are indeed the same size: .053 +/-.001 inch.
The difference is Zo is generated by using dielectric in the 50 ohm
but none in the 75 ohm, and slight
According to the specs in the RF Industries catalog, pages 7 and 14 in
the version I have here, the center pins of 50 ohm and 75 ohm BNC's
are indeed the same size: .053 +/-.001 inch.
The difference is Zo is generated by using dielectric in the 50 ohm
but none in the 75 ohm, and slight
Hello Jim,
I quite agree that what matters is that the connector match the physical
dimensions of the cable.
Originally they didn't mate, 50 Ohm was 50 Ohm and 75 was 75.The pins
were different diameters, and there were warranty warnings to only use
the correct connectors with equipment
All,
And while the pin/receptacle dimensions are important to maintain physical
integrity, the characteristic impedance doesn't come into play unless you
experience a considerable phase length such as a 30 degree discontinuity at a
given frequency.
So at HF the phase length of the 70-50 Ω
On 10/13/2014 10:42 AM, Sandy Blaize wrote:
There is a lot of crap parts available at hamfests these days! Be
careful what you buy!!
Had cable problems with P3 when I first got it. Bob, K6XX, at Elecraft
and who I know well called me and said [only slightly tongue-in-cheek]
they'd send me
The practical answer is try to insert your coax into the bushing. RG-59 and
RG8X are the same size and RG-58 is smaller. If RG-58 is sloppy in the bushing
and RG-59 or RG8X fits then it is OK to use unless you are trying to get an
exact match for micro-wave. If you are a micro-wave engineer
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
Hi Paul,
Although I do not use MMTTY , the fact that you have the lights and TX on the
k3 working suggests that the ptt function (or VOX) is correct.
The fact that all of the other software is working suggests that something
related to the sound card settings in MMTTY is incorrect. Perhaps it
For users of the K3EXREF high-stability option, I have listed a Trimble
Thunderbolt GPSDO package on QTH today.
73,
geo - n4ua
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
Hi Fred
I wonder if you have come across counterfeit TNC connectors. I would guess
that since these are not used in the mass computer industry then there is
less incentive for the counterfeiters to be interested. The BNC is most
interesting because it's so easy to connect and disconnect,
Paul,
How many bars are being illuminated on the K3 ALC meter? If you do not
have 4 bars illuminated with the 5th bar flickering, you do not have
enough audio drive.
If you are using the K3 Line In, you will have to set the SignaLink for
high audio output (see the SL instructions).
The K3
For what it might be worth, I only use 7/16 DIN connectors for my jumpers
and transmission lines. When I have coax switches and baluns made, as well
as accessories such as power meters, I always order them with 7/16 DINs. I
also always buy either Andrew or Times Microwave connectors depending
My experience with a dual-boot computer (Fedora 9 and Windoze XP) with a
relay toggled by the RTS line: Windoze fiddles with the RTS line while
booting, Fedora 9 doesn't.
de AJ4TF
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-and-VB6-tp7593796p7593833.html
Sent
KX3 (rev. 2.25) and PX3 (rev. 1.12) firmware releases are now available for
beta test (see notes below). The previous KX3 beta release has also been moved
to Production status (2.23). The files are located at:
http://www.elecraft.com/KX3/KX3_software.htm
I have to take down a 60ft Rohn-25 tower that's been up for 20 plus
years. I remember seeing a tool advertised in QST and CQ for just this
purpose. It resembled a long lever that was dimensioned for Rohn-25
specifically and helped to pry the sections apart. Any leads to this
tool would be
I remember seeing that tool in magazine ads. I have a modified light weight
scissor jack to loosen tower sections. It loosens all three legs at the
same time. It works very well. If you don't find the rohn tool you might
consider the jack.
73 Joe K2UF
-Original Message-
From:
It's called a Tower Jack...
Dr. William J. Schmidt - K9HZ-J68HZ-8P6HK-ZF2HZ-PJ4/K9HZ-VP5/K9HZ
Owner - Operator
Big Signal Ranch
Staunton, Illinois
email: b...@wjschmidt.com
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe
K2UF
Sent:
I use a small bottle jack and a pair of 2x4 all tied together and then
tied to a tower leg. This protects those below if something slips.
Terry, KQ5U
On 10/13/2014 9:26 PM, Robert G Strickland wrote:
I have to take down a 60ft Rohn-25 tower that's been up for 20 plus
years. I remember seeing
The original Tower Jack is no longer made. A newer/better design is
manufactured by KF7P Metalworks:
http://www.kf7p.com/KF7P/YellowJack.html
Called the Yellow Jack.
That said, be EXTREMELY careful disassembling an old tower, particularly
one that you may not know much of its history or if
Much cheaper version/ copy on eBay... search!
Dr. William J. Schmidt - K9HZ-J68HZ-8P6HK-ZF2HZ-PJ4/K9HZ-VP5/K9HZ
Owner - Operator
Big Signal Ranch
Staunton, Illinois
email: b...@wjschmidt.com
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
I'm downsizing since retirement earlier this year, will be on the road with the
travel trailer. These item need a new home instead of sitting packed away. I
have my KX3, PX3 along with the KXPA 100, it all fits nicely in the trailer.
The K2, s/n 6576, was built in late 2011 by Dale Putnam WC7S,
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