Bought a second hand P3 with 2 KW TX sensor question

[Guy Olinger K2AV]

Well at least it's not "Finding True North" again on TowerTalk.   :>)
 You have not suffered endless threads until you have to filter out
the words "true north" in any email.

73, Guy K2AV

On Sun, Jul 3, 2016 at 2:29 PM, Milverton M. Swire via Elecraft
<[hidden email]> wrote:

>>>> One more reason to NOT use power-poles <<<
> WELL! This post has now morphed into another Rendition of " Power Poles "
>
> (((73))) Milverton / W9MMS
>
>
>       From: "Charlie T, K3ICH" <[hidden email]>
>  To: [hidden email]
>  Sent: Sunday, July 3, 2016 12:23 PM
>  Subject: [Elecraft] FW: Well Hell.... I just bricked my K3s
>
>
> One more reason to NOT use power-poles.
>
> Did I mention that I don't like them?
> They are hard to use, over-rated, unreliable and not re-useable.
>
> Charlie k3ICH
>
>
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of
> lmarion
> Sent: Sunday, July 03, 2016 11:49 AM
> To: [hidden email]; Ken Arck <[hidden email]>
> Subject: Re: [Elecraft] Well Hell.... I just bricked my K3s
>
> What a relief!!  I love my K3S, and hope every  ham has the pleasure of a
> high performance rig.
> Another Elecraft superior moment,  it did not destroy itself and waited for
> the oops moment to pass.
>
> Another teaching moment: Check power supply is No 1 on every trouble shoot
> chart.
>
> Congratulations Ken and 73  Leroy AB7CE
>
> -----Original Message-----
> From: Ken Arck
> Sent: Sunday, July 03, 2016 9:21 AM
> To: [hidden email]
> Subject: Re: [Elecraft] Well Hell.... I just bricked my K3s
>
> Thanks to all who replied to my plea for help!
>
> I did find the problem this morning and man, it was not what I expected. The
> problem turned out to be that power was not getting to the radio. Well,,,
> actually it WAS getting to the radio - to the Power Poles -  but no further.
> I decided to poke around a bit and found that the solder connection on the
> positive pole - it appeared to be cracked, perhaps from the repeated removed
> of the power connector but it seems that the added current draw of the 100
> watt PA did the connection in one way or another. I reflowed the connection
> and the radio is once again happy.
>
> What threw me (and why no power wasn't my first thought to check) was that
> THUMP when the power button was tapped. I guess there was a enough charge in
> some capacitor to do that. Ah well, live and learn....
>
> Again, thanks to all
>
> Ken
>
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[Don Wilhelm]

Don't monkey around with a bad power cable.  If you do not have tight
(low resistance) connections capable of carrying the full current, they
will overheat and can be a source of a fire.

My recommendation is to replace the APP connector with another (or buy
an assembled cable).

You *may* be able to remove the contact blade giving problems from the
housing by itself and replace that contact blade.
To release the contact blade from the spring finger, put a slender
tipped screwdriver between the contact blade and the spring finger
beneath it and pull (or push) the contact blade back until it clears the
spring finger, then pull it out of the housing.  Download the XV50, 144,
222 Assembly manual from the Elecraft website and look at figure 29 on
page 37 for a good cutaway diagram of a properly assembled APP
connector.  Page 38 of that manual also shows how the tip of the APP
connector should look when the contact blade has been fully inserted.

Do *not* try to re-use the contact blade.  If you do not have any, you
can order a new one from Elecraft.   The part number for the contact
blade is E620062 - APP Connector crimp pin.
If you need to replace the housings as well, the red one is Elecraft p/n
E620059 and the black one is p/n E620060.  You will need 2 contact
blades if you are assembling a complete connector.  You can order 15 amp
APP connector sets from other sources as well.
Alternately, you can order the pre-assembled power cable with an APP
connector at one end and #12 ring lugs at the other from Elecraft p/n
KPCA-F.

If you do not have the proper Powerpole crimping tool, do *not* crimp
with an alternate tool.  Instead solder the wire into the contact
blades.  Be careful not to get any solder on the front surface of the
contact blade because that will prevent proper insertion of the blade
into the housing.

On 7/3/2016 2:03 PM, Ken Talbott wrote:

> So what do recommend?
> Ken - ke4rg
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of
> Charlie T, K3ICH
> Sent: Sunday, July 3, 2016 1:56 PM
> To: [hidden email]
> Subject: Re: [Elecraft] FW: Well Hell.... I just bricked my K3s
>
> How are they re-useable once they're crimped?
>
> I guess you could maybe pry the crimp apart. (??)
>
>

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[Jim Brown-10]

On Sun,7/3/2016 10:23 AM, Charlie T, K3ICH wrote:
> One more reason to NOT use power-poles.
>
> Did I mention that I don't like them?
> They are hard to use, over-rated, unreliable and not re-useable.

YMMV. I've been using them since I got my K2 around 2003, and love them.
I'd guess that I've installed several hundred pairs. I find them easy to
install, and at least as reliable as almost any other plug-gable
connectors I've used. I don't crimp them, I solder them.

On Sun,7/3/2016 3:42 PM, Peter Pauly wrote:

> I believe these are what you are thinking of:
>
> http://www.neutrik.com/en/audio/powercon/

Neutrik is a great company based in EU. Mostly they make connectors for
Pro Audio, and their connectors are generally best of the product type.
These connectors are their own invention, designed for use with high
power loudspeakers in big concert sound systems.  They are MUCH larger
than the small red/black Power Pole connectors used in ham radio (about
twice the diameter of a PL-259).

The usefulness of plug-gable connectors is STRONGLY dependent on their
footprint on the panel of the equipment on which they are used. All of
Elecraft's radios would need to be a lot larger if they used connectors
of this size. Some hams like big radios on their desktop. I sure don't
-- one of things I love about my Elecraft rigs is their compact size,
light weight, and small footprint.

Likewise, solid screw contacts can provide more positive cantact, as
W4TV suggests. But I sure wouldn't like to have to drag out a
screwdriver to plug and unplug my rigs, with all the wiring difficult to
access behind my operating desk!

73, Jim K9YC

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