[Elecraft] KX2 Battery Question

[Matt Zilmer]

I'll just reply with

https://www.kaptontape.com/Conductive_Tapes.php

I last used it in the IFE industry.  There may be more than one type,
but I'm not an expert at this.

73,

matt W6NIA


On 05/27/2017 03:31 PM, Mark Petiford wrote:
> RE: Kapton tape
>
>
> Matt,
>
>
> Kapton is actually a pretty good insulator, but it is NOT a good
> material to prevent abrasion.  The aircraft industry tried to use it
> as wire insulation, and as an anti-abrasion wrap around entire wire
> bundles.  Unfortunately, some manufacturers jumped the gun and
> implemented it without testing, using "qualification by analysis" as
> their basis for using it.  I must admit that it SEEMS like it would do
> those jobs well. 
>
>
> It turns out that when we tested it, we found that it doesn't do well
> in a high humidity and high vibration environments, and doesn't
> withstand chaffing very well either.  We rejected its use, but not
> before we had wire harnesses already in production using Kapton
> insulated wires.  Needless to say, we had to rework those harnesses. 
> I don't know if the FAA issued an Airworthiness Directive against
> those aircraft that were delivered using Kapton insulation, but there
> was discussion of that
>
>
> Mark,
>
> KE6BB
>
>
> ------------------------------------------------------------------------
> *From:* Matt Zilmer <mzilmer at roadrunner.com>
> *To:* elecraft at mailman.qth.net
> *Sent:* Saturday, May 27, 2017 2:22 PM
> *Subject:* Re: [Elecraft] KX2 Battery Question
>
> Someone mentioned Kapton tape earlier, to be used to insulate the
> battery side of the PCBA.  Kapton tape is conductive and used mostly for
> EMI shielding.  Putting it or other tapes (some electrical tapes) on the
> the PCBA would probably change electrical characteristics - conduction
> between unmasked vias/pads, etc.
>
> I would avoid using Kapton if you want an insulator.
>
> Just thought this might benefit someone later on.
>
> 73,
>
> matt W6NIA
>
>
> On 05/27/2017 10:42 AM, Wayne Burdick wrote:
> > There are no components anywhere near the battery. The bottom of the
> RF board in this area was left completely clear specifically to avoid
> the need for any supplemental insulating material.
> >
> > 73,
> > Wayne
> > N6KR
> >
> >
> >
> >> On May 27, 2017, at 10:14 AM, Peter Pauly <ppauly at gmail.com
> <mailto:ppauly at gmail.com>> wrote:
> >>
> >> I would have liked to see a big piece of kapton tape covering the
> board. Aren't the components ESD sensitive?
> >>
> >> On Sat, May 27, 2017 at 10:23 AM, Tim McDonough N9PUZ
> <tim.n9puz at gmail.com <mailto:tim.n9puz at gmail.com>> wrote:
> >> On 5/27/2017 12:14 AM, Wayne Burdick wrote:
> >> I have a "new to me" KX2 along with the internal battery and
> charger. Inside the KX2 battery compartment, is there supposed to be
> any sort of insulating sheet or pad covering the circuit board?
> >>
> >> No insulating sheet is necessary. The battery is double
> shrink-wrapped, there are no parts on that area of the PC board, and
> there’s nothing sharp that could abrade the plastic covering. It’s all
> quite safe.
> >>
> >> There is of course a rubberized pad on the inside of the bottom
> cover. This creates high friction to keep the battery from moving around.
> >>
> >>
> >> Very good. Great radio and I just didn't want to mess anything up.
> >>
> >> Thank you Wayne!
> >>
> >> 73,
> >>
> >> Tim N9PUZ
> >>
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> -- 
> "Always store beer in a dark place." -- R. Heinlein
>
> Matt Zilmer, W6NIA
> [Voignier]
>
>
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-- 
"Always store beer in a dark place." -- R. Heinlein

Matt Zilmer, W6NIA
[Voignier]