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normal K3 voltage drop on TX

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Jerry Moore

Re: normal K3 voltage drop on TX

Nice NASA geek type reading on connections and such. I'm sure the
information is largely out of date but still has a ton of really good info.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19750010203.pdf

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Edward
R Cole
Sent: Saturday, August 22, 2015 2:03 AM
To: [hidden email]
Subject: Re: [Elecraft] normal K3 voltage drop on TX

I agree with Bob, but as 45-years experience has taught me.

Properly crimped bright new copper wire is fine. Take a look several years
later (also compare contact resistance; probably best measured as voltage
drop under load). If you live in the desert where humidity never rises
above 25% you may not see any change. Put the same crimped connector
100-foot from salt water and less than three years it will turn green and
start to fail. Put on a boat with no sealant and the connector will fall
apart.

Solder the connector after crimping to that bright new copper wire and those
problems will be lessened. ON a boat only airtight sealant will ensure long
life. I find where I want to ensure lowest contact resistance soldering
after crimping works.

But if the wire is subject to repeated movement or vibrational forces the
soldered connection will break whereas crimp-only seems more resilient.
Spacecraft use crimped-only connectors (subject to high g-force vibration in
launch and extreme temperature variations). But then there is no air in
space and thus no moisture to corrode.

For ordinary shack wiring of a ham station crimp+ solder causes no harm. I
use it where ever I want to ensure the lowest voltage drop under load.

Most of those NAPA wire crimpers are a poor excuse for a real tool - but
probably what most of us use. My coax crimpers are properly racheting
crimpers and produce a good contact. Still I do not like them in situations
where the cable sees a lot of movement. Good old compression back nut
construction is best. I'm talking about N, BNC, TNC, sma, 7/16, etc.
PL-259's are used only if I have to.

73, Ed - KL7UW

----------
From: Bob McGraw - K4TAX <[hidden email]>
To: Jerry Moore <[hidden email]>, [hidden email]
Subject: Re: [Elecraft] normal K3 voltage drop on TX
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

Properly it must be crimped A N D soldered. Both are required.
Are you saying a crimped and soldered connection is worse than a crimped
only connection?

My military experience says there first must be a mechanical connection made
{crimp or wrap} and then follow with an electrical connection
{solder}. And RCA stipulated this practice in all of their broadcast
equipment.

73
Bob, K4TAX
K3S s/n 10,163

73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
[hidden email]

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aj4tf

Re: normal K3 voltage drop on TX

In reply to this post by Bob McGraw - K4TAX

Bob,
Crimped connections are superior to soldered connections in a high vibration, high stress environment.
The solder will fracture after exposure to vibration and/or temperature cycles. With a proper crimp tool
(not the one from Harbor Freight!) the resistance of a proper crimped connection will be no higher than
that of a soldered connection. The TE/Amp PROIII hand crimp tool is $213 at Digikey...The Amphenol
hex die crimper for RG-8, RG213, etc. is $112.

But, soldered connections are fine for a ham shack.

de AJ4TF

Eric Swartz - WA6HHQ

Re: normal K3 voltage drop on TX

Administrator

Lets end the thread at this time in the interest of reducing list overload for others.

73,

Eric
List Moderator, from time to time..
elecraft.com
_..._

> On Aug 23, 2015, at 1:41 AM, aj4tf <[hidden email]> wrote:
>
> Bob,
> Crimped connections are superior to soldered connections in a high
> vibration, high stress environment.
> The solder will fracture after exposure to vibration and/or temperature
> cycles. With a proper crimp tool
> (not the one from Harbor Freight!) the resistance of a proper crimped
> connection will be no higher than
> that of a soldered connection. The TE/Amp PROIII hand crimp tool is $213
> at Digikey...The Amphenol
> hex die crimper for RG-8, RG213, etc. is $112.
>
> But, soldered connections are fine for a ham shack.
>
> de AJ4TF
>
>
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/normal-K3-voltage-drop-on-TX-tp7606504p7606603.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
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Jeff Cochrane - VK4XA

Re: normal K3 voltage drop on TX

In reply to this post by Charles Yahrling

CONTENTS DELETED

The author has deleted this message.

Bob McGraw - K4TAX

Different Reflectors for different models

In reply to this post by Joe Subich, W4TV-4

For those that might have a more or less interest in various
products.........

Why not a K3/K3S reflector?
Why not a P3 reflector?
Why not a KX3 reflector?
Why not a K2 reflector?

and so on.

At least put the model in the subject line. That way I can eliminate
automatically the "not interested" items.

73
Bob, K4TAX
K3S s/n 10,163

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Ingo Meyer, DK3RED-2

Re: Different Reflectors for different models

Hello Bob,

> For those that might have a more or less interest in various products.........

Oh no, please, don't do it! There is one (!) list for one (!) product - Elecarft! I also
own only at the time a K1 and K2, so many topics are rather uninteresting for me. But I am
also interested in other issues with other products (like antennas, power supply etc.)
with other products.

> At least put the model in the subject line. That way I can eliminate automatically the
> "not interested" items.

Yes, that's the right way!
--
73/72 de Ingo, DK3RED - Don't forget: the fun is the power!
www.qrp4fun.de - [hidden email]
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Arie Kleingeld PA3A-2

Re: Different Reflectors for different models

Ingo,

I totally agree on your statement. One reflector with productname in
subject line.
(Filtering options in my e-mail program (thunderbird) do the rest.)
With multiple reflectors, think about all that moderation... ;-)

73
Arie PA3A

Ingo Meyer, DK3RED schreef op 23-8-2015 om 17:30:

> Hello Bob,
>
>> For those that might have a more or less interest in various
>> products.........
>
> Oh no, please, don't do it! There is one (!) list for one (!) product
> - Elecarft! I also own only at the time a K1 and K2, so many topics
> are rather uninteresting for me. But I am also interested in other
> issues with other products (like antennas, power supply etc.) with
> other products.
>
>> At least put the model in the subject line. That way I can eliminate
>> automatically the
>> "not interested" items.
>
> Yes, that's the right way!

ktalbott

Re: normal K3 voltage drop on TX

In reply to this post by aj4tf

Never solder PSU connectors - overcurrent can heat the joint and drop molten
solder where you least desire it!
Ken - ke4rg

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of aj4tf
Sent: Sunday, August 23, 2015 1:41 AM
To: [hidden email]
Subject: Re: [Elecraft] normal K3 voltage drop on TX

Bob,
Crimped connections are superior to soldered connections in a high
vibration, high stress environment.
The solder will fracture after exposure to vibration and/or temperature
cycles. With a proper crimp tool (not the one from Harbor Freight!) the
resistance of a proper crimped connection will be no higher than
that of a soldered connection. The TE/Amp PROIII hand crimp tool is $213
at Digikey...The Amphenol
hex die crimper for RG-8, RG213, etc. is $112.

But, soldered connections are fine for a ham shack.

de AJ4TF

<snip>

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bs usb

Re: normal K3 voltage drop on TX

Kenneth Talbott wrote:
> Never solder PSU connectors - overcurrent can heat the joint and drop molten
> solder where you least desire it!
> Ken - ke4rg
>

I thought the fuses were protection against over current conditions.
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Dalton

Re: Different Reflectors for different models

In reply to this post by Ingo Meyer, DK3RED-2

Well at the very least always fill in the subject line with the true subject even with a reply. Make darn sure what is in the message matches the subject line.

Dalton - W4WUQ
[hidden email]
Sent from my iPad

> On Aug 23, 2015, at 10:30 AM, Ingo Meyer, DK3RED <[hidden email]> wrote:
>
> Hello Bob,
>
>> For those that might have a more or less interest in various products.........
>
> Oh no, please, don't do it! There is one (!) list for one (!) product - Elecarft! I also own only at the time a K1 and K2, so many topics are rather uninteresting for me. But I am also interested in other issues with other products (like antennas, power supply etc.) with other products.
>
>> At least put the model in the subject line. That way I can eliminate automatically the
>> "not interested" items.
>
> Yes, that's the right way!
> --
> 73/72 de Ingo, DK3RED - Don't forget: the fun is the power!
> www.qrp4fun.de - [hidden email]
> ______________________________________________________________
> Elecraft mailing list
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Bob McGraw - K4TAX

Re: normal K3 voltage drop on TX

In reply to this post by bs usb

If there is a connection which is heating that much, one has more issues
than molten solder to be resolved.

73
Bob, K4TAX
K3S s/n 10,163

On 8/23/2015 12:37 PM, bs usb wrote:

>
> Kenneth Talbott wrote:
>> Never solder PSU connectors - overcurrent can heat the joint and drop
>> molten
>> solder where you least desire it!
>> Ken - ke4rg
>>
>
> I thought the fuses were protection against over current conditions.
> ______________________________________________________________
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>
>

Lynn W. Taylor, WB6UUT

Re: Different Reflectors for different models

In reply to this post by Bob McGraw - K4TAX

The list guidelines already ask this.

If you want automatic classification and you don't want to rely on
people following the list guidelines, check out popfile.
<http://getpopfile.org/>

I also cast my vote against fracturing the list. I have a KX3, but I
read a lot of the K3 threads, and antenna stuff is always interesting.

73 -- Lynn

On 8/23/2015 7:55 AM, Bob McGraw - K4TAX wrote:
> At least put the model in the subject line. That way I can eliminate
> automatically the "not interested" items.

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Jim Rhodes-3

Re: Different Reflectors for different models

In reply to this post by Bob McGraw - K4TAX

Bob, you just showed us your noob status. Many people ask this same
question and while I don't mind if someone mentions a model in a subject I
never would think of filtering. We are one group. Filter away if you want.
I have a very well worn delete key and it gets a daily test. But I want
them all delivered. And enough of us feel this way that if you do filter
to see only "k3s" you will only see a fraction of "k3s" posts.

On Sun, Aug 23, 2015 at 9:55 AM, Bob McGraw - K4TAX <[hidden email]>
wrote:

> For those that might have a more or less interest in various
> products.........
>
> Why not a K3/K3S reflector?
> Why not a P3 reflector?
> Why not a KX3 reflector?
> Why not a K2 reflector?
>
> and so on.
>
> At least put the model in the subject line. That way I can eliminate
> automatically the "not interested" items.
>
> 73
> Bob, K4TAX
> K3S s/n 10,163
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

pa0pje

Re: Different Reflectors for different models

Jim,
You may not mind but it is a formal request by the moderator to do so.
I do filter, but not to delete messages. I use the filter option to have
the subjects split into different sub-folders, named with the
corresponding type of equipment.

Deleting what is not of my interest is still an easy task. I simply do
not know what extra burden it is just to start a question with "K3 " if
it is specifically about a K3 or "KPA500 " if it concerns a KPA500, in
the subject line.

Clearly I am against a separate list, for I too like to read all
discussions to learn more about our common hobby.

73,
Peter

Op 2015-08-24 02:59 schreef Jim Rhodes:
> I don't mind if someone mentions a model in a subject
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Guy Olinger K2AV

Re: Different Reflectors for different models

I don't get it.

Even for a whole day of mail for one of the busiest reflectors around, my
Gmail app for the iPhone will let me
delete out personally uninteresting email by subject line in less than 30
seconds.

Are some of us *offended* by seeing email we're not interested in? What's
going on?

I do have Elecraft Mail all gathered to one folder by filter. All my
reflector mail is filtered to folder by reflector. If I look at
Elecraft my usual four or five times a day, clearing out uninteresting
subjects is a five second exercise if even that.

Common email tools seem more than adequate to the task. And spam for some
months now seems to be running at a tenth of prior volume.

73, Guy K2AV

--
Sent via Gmail Mobile on my iPhone
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Eric Swartz - WA6HHQ

Re: Different Reflectors for different models

Administrator

Let's end this thread at this time.

We prefer to keep the Elecraft list as our central and official gathering place
for info on all of our products. We always post here first when making new
announcements, and we also are not able to watch a multitude of different
fragmented lists 100%. We do try to watch this list as much as possible, both
for questions and for great product ideas :-) Also, many of our customers own
multiple products from Elecraft. This list is the central point to check for
info on all of our products, and its by far the best place to ask questions
about any of our products etc.

Plus, this list serves as our major motivator to keep on creating cool products
for all of you!

73,

Eric
/elecraft.com/
----
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