[Elecraft] OT: Surgery on female N-connector

2018-10-31 Thread Erik Basilier
My apologies for going far OT here. Any replies direct only please.
I am trying to fix the broken N connector on a surplus 100W dummy load, RELM
T44004.
The female part has lost 2 of its 4 fingers, and needs to be replaced. The
connector has a standard size square flange with 4 screws. (This is *not*
the same as the larger square flange of the interchangeable Bird
connectors). On the back is a custom part that connects to the load
resistor. It seems to be crimped to the female N part. My hope is that I
will be able to separate these parts and attach the custom part to a new
N-female part. The combo slides out easily from the teflon insulator. The
first task is to obtain a new N-female part, preferably gold-plated. Taking
a hacksaw to a barrel female-female, or elbow male-female seems like a lot
of work. Even getting the center connector out of a chassis mount N female
might take some work, but seems easier. My junk box is heavy with N
connectors, but to my surprise I couldn't find a single chassis mount N
female. My question to the group: Has anyone attempted to get the center
part out from a female N connector? Was a particular brand of N connector
especially easy to work on? 
Thanks in advance for any tips.
73,
Erik K7TV

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[Elecraft] FS: Brand new KRC2ACC

2018-10-31 Thread Doug Shields
Hello everyone,

 I have a freshly built KRC2 band decoder for sale.  It was just
completed and tests out fine.  It includes the Accessibility Upgrade that
announces functions in Morse code.  It will come in the original Elecraft
box, with original manuals, power cord,  and everything received with the
kit.  It is of course in excellent condition having only check out time
since completion.  $110.00 shipped to any US destination.

 

Doug  W4DAS



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[Elecraft] KAT500 vs KAT3 High SWR Ability

2018-10-31 Thread James Bennett via Elecraft
Recently assembled a KPA500 / KAT500 pair and hooked ‘em up to my 2010 K3. I’m 
wondering what the capability of the KAT500 is versus that KAT3 internal K3 
tuner, as far as what each will match. 

I ask this because the KAT500 does a horrible job on 17 meter. The best if can 
do is about 2.3:1, whereas the K3 internal tuner has no difficulty getting a 
1.0:1 match on the same antenna.

The antenna I use is an 88 foot long doublet 45 feet high. It is fed with about 
110 feet of 600-ohm ladder line. At the shack end is a Balun Designs 4:1 balun, 
and from there to the back of the KAT500 is about ten feet of Belden 9913.

Is the KAT500 less capable of matching ugly SWR levels than the KAT3?

Jim / W6JHB
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[Elecraft] KUSB cable required

2018-10-31 Thread Len
Hello Elecrafter’s.  Do any of you have a spare KUSB cable that they would like 
to sell me?  I have gone through all my accessory drawers, behind my desk, and 
equipment boxes.  I cannot program any of my K-line without it!  Tnx and best 
73.  Len
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[Elecraft] OT: Additional on antenna charge ...

2018-10-31 Thread Ken G Kopp
My open wire fed 1/2 wave 80M Zepp has an RF choke from each feeder leg to
the station ground.

Hint: Flashing copper sheared from the long side of a 4 x 8 foot sheet at
your local metal supply in 1 or 2 inch widths is ideal for equipment
grounding.  Use 1/4 - 20 brass hardware with wing-nuts for connecting flat
braid runs to equipment.

73 !

K0PP
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Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-31 Thread Fred Jensen
Yep, all true.  The somewhat insidious thing about precip static is that 
it can be totally innocuous, unlike T-storms, lightning strikes, and the 
like.  We hadn't even noted that it had begun snowing, fairly hard, 
outside the tent, when the first rx quit.  The "frying bacon" and the 
tiny little "grass" on the baseline of the panadapter should have been a 
clue to "look outside" to a bunch of OF's with that much accumulated 
experience ... sadly it wasn't.  OTOH, QRN from multiple distant 
T-storms is just that ... annoying noise in the receiver with no danger. 
Likewise with power line hash.  Of all the forms of QRN, and excluding a 
lightning strike [which is hard to ignore], precip static can be the 
most dangerous to equipment and go unrecognized by new folk [and a 
handful of OT's].


In this age with a dearth of Elmers standing next to you, that function 
seems to have migrated to email lists like this one, various fora, and 
various wiki's.  I don't think they can replace W6RMK, with my latest 
electronic creation [usually a TX] on his bench, explaining how the grid 
of the PA rectifies some of the RF waveform and charges a capacitor that 
slowly leaks off through an appropriately named "grid leak" resistor. [:-)


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 10/31/2018 4:14 PM, Don Wilhelm wrote:

Skip,

Yes, there are various causes of static on the feedline, but static is 
static.  It is a voltage charge on the feedline and it can damage 
equipment.
The source may be wind blowing on your antenna, rain or snow that 
carries charged particles, or nearby lightning.  No matter what the 
cause, it can produce a significant voltage across your feedline.  It 
does not take a direct lightning hit to produce damaging voltages on 
your antenna feedline.  A direct hit can cause damage to house and 
home and any equipment in that home, but there are other times when 
the accumulated static voltage on any feedline can cause damage to 
your ham equipment.


I recall an event many years ago when I got that lesson.  I had 
several antennas in the basement shack unterminated and just waiting 
to be connected.  The wind was blowing and I thought nothing of it 
until I picked up an open feedline and placed it near my Heathkit 
HW101 intending to connect it - sparks flew as the coax got close to 
the chassis!  That was a warning to me - disconnect and ground all my 
feedlines when not in use.  If not grounded, at least a bleed resistor 
across the feedlines to discharge any built up static.


73,
Don W3FPR



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Re: [Elecraft] OT: Dry air static

2018-10-31 Thread Fred VE3FAL
Snow static as well during blizzards do wonders to light up a neon bulb. I used 
to put one between my long-wire and ground, even wind when it would get a good 
swing would do the same thing

Fred
VE3FAL

Sent from my iPhone
Fred VE3FAL/CIW649


> On Oct 31, 2018, at 19:13, Rose  wrote:
> 
> Fred,
> 
> I recall the output capacitor of the pi-net capacitor in my HT-17
> rythmatically snapping in response to the charged particles of dust in the
> dry Oklahoma air
> building up on the long wire antenna. (;-)
> 
> 73 !
> 
> K0PP
> kengk...@gmail.com
> 
>> On Wed, Oct 31, 2018, 16:42 Fred Jensen > 
>> Hmmm ... There seem to be different flavors of static.  My reference was
>> to what is often called "precipitation static" [rain, snow, maybe hail]
>> and which can sometimes also be caused by wind blowing sand/dust past
>> the antenna.  It sounds like bacon frying in the receiver.  Each drop or
>> snowflake acquires a minuscule charge falling or blowing which
>> discharges into the antenna on contact.  The typical semiconductor
>> devices in radio front ends these days exhibit a nearly infinite
>> impedance to "ground" and a tiny capacitance.  The constant little
>> pulses from the static charge that capacitance with essentially no
>> discharge path.  That's what fried the 1st 760 II and then, predictably,
>> the second one.
>> 
>> There is also the combined "static" caused by distant thunderstorms.
>> 
>> INT QRN: "Are you troubled by static"
>> QRN: "I am troubled by static"
>> 
>> which is different than "static" caused by corona or leakage on a high
>> voltage power transmission line.
>> 
>> 73,
>> 
>> Fred ["Skip"] K6DGW
>> Sparks NV DM09dn
>> Washoe County
>> 
>> PS:  For those about to tell me "nearly infinite" is a meaningless term,
>> save the BW.  I know, I hold a math degree.  Just using a little
>> editorial license.
>> 
>>> On 10/31/2018 3:10 PM, ab2tc wrote:
>>> Hi,
>>> 
>>> It's a dead short circuit for DC and low frequencies thanks to the SWR
>>> bridge (it has a voltage transformer directly across the antenna
>> terminals).
>>> There seems to be different opinions on what is meant by "static". To me
>> it
>>> means a slowly varying DC voltage caused by static buildup in the clouds
>>> during or before thunderstorms. The K3(S) is perfectly protected against
>>> these. Some people include the transients that are caused by actual
>>> lightning strikes nearby in the definition of "static". The K3(S) is not
>>> protected against these as they have very strong high frequency content.
>> For
>>> these extra protection is needed as discussed several places in this
>> thread.
>>> I have a number of Alpha-Delta switches in my antenna system and they
>> have
>>> gas discharge tubes, but frankly I have no idea how effective they are.
>>> 
>>> AB2TC - Knut
>>> 
>>> 
>>> wayne burdick wrote
> On Oct 30, 2018, at 12:50 PM, Fred Jensen 
 k6dgw@
  wrote:
> Does my K3 have a static bleed across the antenna terminal(s)?
 Yes.
 
 Wayne
 N6KR
 
>>> 
>>> 
>>> 
>>> 
>>> --
>>> Sent from: http://elecraft.365791.n2.nabble.com/
>>> __
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>>> 
>> 
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Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-31 Thread Don Wilhelm

Skip,

Yes, there are various causes of static on the feedline, but static is 
static.  It is a voltage charge on the feedline and it can damage equipment.
The source may be wind blowing on your antenna, rain or snow that 
carries charged particles, or nearby lightning.  No matter what the 
cause, it can produce a significant voltage across your feedline.  It 
does not take a direct lightning hit to produce damaging voltages on 
your antenna feedline.  A direct hit can cause damage to house and home 
and any equipment in that home, but there are other times when the 
accumulated static voltage on any feedline can cause damage to your ham 
equipment.


I recall an event many years ago when I got that lesson.  I had several 
antennas in the basement shack unterminated and just waiting to be 
connected.  The wind was blowing and I thought nothing of it until I 
picked up an open feedline and placed it near my Heathkit HW101 
intending to connect it - sparks flew as the coax got close to the 
chassis!  That was a warning to me - disconnect and ground all my 
feedlines when not in use.  If not grounded, at least a bleed resistor 
across the feedlines to discharge any built up static.


73,
Don W3FPR

On 10/31/2018 6:42 PM, Fred Jensen wrote:
Hmmm ... There seem to be different flavors of static.  My reference was 
to what is often called "precipitation static" [rain, snow, maybe hail] 
and which can sometimes also be caused by wind blowing sand/dust past 
the antenna.  It sounds like bacon frying in the receiver.  Each drop or 
snowflake acquires a minuscule charge falling or blowing which 
discharges into the antenna on contact.  The typical semiconductor 
devices in radio front ends these days exhibit a nearly infinite 
impedance to "ground" and a tiny capacitance.  The constant little 
pulses from the static charge that capacitance with essentially no 
discharge path.  That's what fried the 1st 760 II and then, predictably, 
the second one.


There is also the combined "static" caused by distant thunderstorms.

INT QRN: "Are you troubled by static"
QRN: "I am troubled by static"

which is different than "static" caused by corona or leakage on a high 
voltage power transmission line.

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[Elecraft] OT: Dry air static

2018-10-31 Thread Rose
Fred,

I recall the output capacitor of the pi-net capacitor in my HT-17
rythmatically snapping in response to the charged particles of dust in the
dry Oklahoma air
building up on the long wire antenna. (;-)

73 !

K0PP
kengk...@gmail.com

On Wed, Oct 31, 2018, 16:42 Fred Jensen  Hmmm ... There seem to be different flavors of static.  My reference was
> to what is often called "precipitation static" [rain, snow, maybe hail]
> and which can sometimes also be caused by wind blowing sand/dust past
> the antenna.  It sounds like bacon frying in the receiver.  Each drop or
> snowflake acquires a minuscule charge falling or blowing which
> discharges into the antenna on contact.  The typical semiconductor
> devices in radio front ends these days exhibit a nearly infinite
> impedance to "ground" and a tiny capacitance.  The constant little
> pulses from the static charge that capacitance with essentially no
> discharge path.  That's what fried the 1st 760 II and then, predictably,
> the second one.
>
> There is also the combined "static" caused by distant thunderstorms.
>
> INT QRN: "Are you troubled by static"
> QRN: "I am troubled by static"
>
> which is different than "static" caused by corona or leakage on a high
> voltage power transmission line.
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> PS:  For those about to tell me "nearly infinite" is a meaningless term,
> save the BW.  I know, I hold a math degree.  Just using a little
> editorial license.
>
> On 10/31/2018 3:10 PM, ab2tc wrote:
> > Hi,
> >
> > It's a dead short circuit for DC and low frequencies thanks to the SWR
> > bridge (it has a voltage transformer directly across the antenna
> terminals).
> > There seems to be different opinions on what is meant by "static". To me
> it
> > means a slowly varying DC voltage caused by static buildup in the clouds
> > during or before thunderstorms. The K3(S) is perfectly protected against
> > these. Some people include the transients that are caused by actual
> > lightning strikes nearby in the definition of "static". The K3(S) is not
> > protected against these as they have very strong high frequency content.
> For
> > these extra protection is needed as discussed several places in this
> thread.
> > I have a number of Alpha-Delta switches in my antenna system and they
> have
> > gas discharge tubes, but frankly I have no idea how effective they are.
> >
> > AB2TC - Knut
> >
> >
> > wayne burdick wrote
> >>> On Oct 30, 2018, at 12:50 PM, Fred Jensen 
> >> k6dgw@
> >>  wrote:
> >>> Does my K3 have a static bleed across the antenna terminal(s)?
> >> Yes.
> >>
> >> Wayne
> >> N6KR
> >> 
> >
> >
> >
> >
> > --
> > Sent from: http://elecraft.365791.n2.nabble.com/
> > __
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> > Message delivered to k6...@foothill.net
> >
>
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[Elecraft] KE7X print books 20% discount

2018-10-31 Thread Cady, Fred
www.lulu.com has a 20% discount on print books and 
calendars - TWENTY18.

There is a 15% discount on everything including the pdf books:  FWD15

Search for KE7X books.


73,

Fred KE7X


For all KE7X Elecraft books, see www.ke7x.com

Follow us on Facebook KE7XBOOKS

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Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-31 Thread Fred Jensen
Hmmm ... There seem to be different flavors of static.  My reference was 
to what is often called "precipitation static" [rain, snow, maybe hail]  
and which can sometimes also be caused by wind blowing sand/dust past 
the antenna.  It sounds like bacon frying in the receiver.  Each drop or 
snowflake acquires a minuscule charge falling or blowing which 
discharges into the antenna on contact.  The typical semiconductor 
devices in radio front ends these days exhibit a nearly infinite 
impedance to "ground" and a tiny capacitance.  The constant little 
pulses from the static charge that capacitance with essentially no 
discharge path.  That's what fried the 1st 760 II and then, predictably, 
the second one.


There is also the combined "static" caused by distant thunderstorms.

INT QRN: "Are you troubled by static"
QRN: "I am troubled by static"

which is different than "static" caused by corona or leakage on a high 
voltage power transmission line.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

PS:  For those about to tell me "nearly infinite" is a meaningless term, 
save the BW.  I know, I hold a math degree.  Just using a little 
editorial license.


On 10/31/2018 3:10 PM, ab2tc wrote:

Hi,

It's a dead short circuit for DC and low frequencies thanks to the SWR
bridge (it has a voltage transformer directly across the antenna terminals).
There seems to be different opinions on what is meant by "static". To me it
means a slowly varying DC voltage caused by static buildup in the clouds
during or before thunderstorms. The K3(S) is perfectly protected against
these. Some people include the transients that are caused by actual
lightning strikes nearby in the definition of "static". The K3(S) is not
protected against these as they have very strong high frequency content. For
these extra protection is needed as discussed several places in this thread.
I have a number of Alpha-Delta switches in my antenna system and they have
gas discharge tubes, but frankly I have no idea how effective they are.

AB2TC - Knut


wayne burdick wrote

On Oct 30, 2018, at 12:50 PM, Fred Jensen 

k6dgw@
 wrote:

Does my K3 have a static bleed across the antenna terminal(s)?

Yes.

Wayne
N6KR






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Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-31 Thread ab2tc
Hi,

It's a dead short circuit for DC and low frequencies thanks to the SWR
bridge (it has a voltage transformer directly across the antenna terminals).
There seems to be different opinions on what is meant by "static". To me it
means a slowly varying DC voltage caused by static buildup in the clouds
during or before thunderstorms. The K3(S) is perfectly protected against
these. Some people include the transients that are caused by actual
lightning strikes nearby in the definition of "static". The K3(S) is not
protected against these as they have very strong high frequency content. For
these extra protection is needed as discussed several places in this thread.
I have a number of Alpha-Delta switches in my antenna system and they have
gas discharge tubes, but frankly I have no idea how effective they are.

AB2TC - Knut


wayne burdick wrote
>> On Oct 30, 2018, at 12:50 PM, Fred Jensen 

> k6dgw@

>  wrote:
>> 
>> Does my K3 have a static bleed across the antenna terminal(s)?
> 
> Yes.
> 
> Wayne
> N6KR
> 





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Re: [Elecraft] Avoiding costly lightning damage to your radios gear

2018-10-31 Thread K8TE
With 26 years experience in USAF communications and even more in commercial
broadcasting, I disconnect all wire inputs to my station's components when
the threat of thunderstorms arises.  If planned well, this is easy to
accomplish.  I have made significant money repairing commercial broadcast
transmitters which were installed properly but still suffered damage during
direct hits to their antennas.  That damage was very rare, but still
occurred.

I disconnect my DSL router's wall wart and phone line inputs along with
antenna, rotator control, and other cables that enter through the single
point protected/bonded/grounded panel.  That has worked every time!  If
lightning comes within ten miles, I disconnect.  If away from home, all my
valuable electronics are disconnected.  I do the same for snow storms which
with blowing wind also generate significant static electricity.

Why take the chance?  If I were to run a remote system, like my race car, I
would be ready to walk away from either in spite of taking appropriate
preventive measures and accept the loss.

73, Bill, K8TE



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[Elecraft] KAT500-F Available

2018-10-31 Thread Chuck Stover via Elecraft
Earlier this year I upgraded from the KPA500/KAT500 combo to a KPA1500.  The 
KPA500 was sold to a local that already had a KAT500.  As a result my KAT500-F 
has been orphaned.
If anyone is interested contact me off list.  My QRZ.com info is good.
Pictures available.
73,  Chuck K4QS
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[Elecraft] US Navigator Interface Cable for K3

2018-10-31 Thread Jim - WS6X
G'day,
Anyone on this list interested in a US Navigator cable set for the K3?
Includes the optional cable for controlling the KPA500. Please contact me
off list.
Thanks - Jim, WS6X

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[Elecraft] KXPD2 Extra Spring?

2018-10-31 Thread Lou Voerman W2ROW
I just received a new KXPD2 paddle from Elecraft. In the envelope was a
loose, extra spring with no documentation as to its purpose. Does anyone
know if the extra spring is the same as the original or is it some kind of
tension adjustment like the three different springs that came with the
KXPD3?

Also there are now two allen screws per paddle one to set the adjustment and
one to lock it in. All the documentation I could find showed only the one
adjustment screw per paddle.

I did email Elecraft support about the spring but no answer yet.

Thanks,
Lou   W2ROW





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