K3 ESD

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K3 ESD

Kjeld Holm
Dear all,

I am about to install my subreceiver  and would like to finish before the
weekend but I have no ESD work place. How can I best protect the parts? Or
do I have to wait until I can get the needed ESD equipment?

OZ1CCM, Kjeld

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Re: K3 ESD

David Pratt
Wear cotton clothing rather than nylon or highly static material; avoid
walking around on static-prone carpets.  Wrap a length of bare copper
wire around your wrist and solder a 2 megohm resistor to it. Connect
that to a nearby ground connection.  Just ensure that the K3 is always
at the same potential as yourself by touching its frame regularly.

You should be okay at that.

73 de David G4DMP

In a recent message, Kjeld Holm <[hidden email]> writes
>I am about to install my subreceiver  and would like to finish before the
>weekend but I have no ESD work place. How can I best protect the parts? Or
>do I have to wait until I can get the needed ESD equipment?
--
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +



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Re: K3 ESD

turnbull
In reply to this post by Kjeld Holm
Kjeld,
    I used a table away from electrical appliances and covered it with tin
or aluminum foil.   I had an antistatic wrist strap which I connected to
this large piece of foil and worked in this manner.   Ideally you would
connect the foil to a ground through a 1 MegOhm resistor.   Note I did not
power the K3 or any test equipment up while working atop this foil otherwise
one would possibly cause a short or worse electrocute oneself.   Generally
the larger the area of conductor the less the difficulty with ESD, at
component level the risk of ESD damage is greatest, at board level it is
considerably reduced and at assembly level it is further reduced.

    You do the above at your own risk but it worked for me.   Wear cotton
avoid synthetic clothing and stay away from rugs or carpets.   Safety first
and I suppose this means we should both purchase an anti-static mat.

     Good luck and please thinks safety first.

                73 Doug EI2CN

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Kjeld Holm
Sent: 17 December 2010 09:18
To: 'elecraft'
Subject: [Elecraft] K3 ESD

Dear all,

I am about to install my subreceiver  and would like to finish before the
weekend but I have no ESD work place. How can I best protect the parts? Or
do I have to wait until I can get the needed ESD equipment?

OZ1CCM, Kjeld

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Re: K3 ESD

gm3sek
In reply to this post by David Pratt
David Pratt wrote:
>In a recent message, Kjeld Holm <[hidden email]> writes
>>I am about to install my subreceiver  and would like to finish before the
>>weekend but I have no ESD work place. How can I best protect the parts? Or
>>do I have to wait until I can get the needed ESD equipment?

>Wear cotton clothing rather than nylon or highly static material; avoid
>walking around on static-prone carpets.  Wrap a length of bare copper
>wire around your wrist and solder a 2 megohm resistor to it.

Well, maybe do the soldering first...

The resistor can be 1 megohm or anything else in that region. It purpose
is to limit any ESD current surge, and also to limit any accidental
shock current in your body. For both of those reasons, the resistor
should be at least 250V rated, and the wrist band must be insulated from
any accidental contact (except to yourself).

>Connect
>that to a nearby ground connection.  Just ensure that the K3 is always
>at the same potential as yourself by touching its frame regularly.
>

NO - that is completely the wrong way around!  A "ground" connection to
the Mother Planet will NOT ensure ESD protection.  If done without
proper understanding, it is more likely to *increase* the risks to both
the equipment and yourself.

The whole purpose of ESD protection is to minimize all voltage
differences and current surges between your body and the electronic
components, so connect your home-made wrist strap directly to the K3.

Since you do not have a proper ESD mat, place the K3 and KRX3 on a sheet
of aluminium foil. Before opening the anti-static bag containing the
KRX3, leave the bag on the foil for a short time to allow any static
potentials to equalize.

You will then be working with a reasonable level of ESD protection. As
it isn't necessary to connect any other mains-powered equipment or use a
soldering iron while installing K3 option boards, grounding of the K3
and the sheet of foil is purely optional.




--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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Re: K3 ESD

David Cutter
In reply to this post by David Pratt
I also put *everything* on a metal tea tray which has the Mohm resistor to
earth.  My wrist strap connects to the tea tray.  Equi-potential is the
secret.  Put the unwrapped packets on the tray with the K3 and unwrap them
onto the tray.

David
G3UNA


> Wear cotton clothing rather than nylon or highly static material; avoid
> walking around on static-prone carpets.  Wrap a length of bare copper
> wire around your wrist and solder a 2 megohm resistor to it. Connect
> that to a nearby ground connection.  Just ensure that the K3 is always
> at the same potential as yourself by touching its frame regularly.
>
> You should be okay at that.
>
> 73 de David G4DMP
>
> In a recent message, Kjeld Holm <[hidden email]> writes
>>I am about to install my subreceiver  and would like to finish before the
>>weekend but I have no ESD work place. How can I best protect the parts? Or
>>do I have to wait until I can get the needed ESD equipment?
> --  

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Re: K3 ESD

John Ragle
In reply to this post by Kjeld Holm
Hello, Kjeld...

     I have done lots of work with electrostatic-sensitive components
for a number of years, and have never had anything wrt ESD other than a
wrist-strap (and its IMPORTANT series resistor). I rarely use the
wrist-strap, but instead try to use common sense wrt grounding... I use
a grounded soldering station, which in your case of the K3+subreceiver
is irrelevant, and am careful to discharge myself on one or more
grounded devices AFTER seating myself to work on the electronics. I
habitually to wear cotton or wool clothing, not plastic (synthetic) cloth.

     Even if the devices on which you "ground" yourself are not
physically grounded, if they are large enough their capacitance will
accept enough charge to equalize potential differences in the
surroundings and render you non-dangerous wrt ESD. (After all, a
"ground" is really a connection to a rather large conducting sphere
called "the earth.") In the USA most devices such as computers, some
lamps, etc. have a 3rd wire connection to ground and make good discharge
devices.

     One simply wants to minimize the potential difference between you,
your work object, your soldering iron, and your coffee cup. Great
anxiety is not necessary.

John Ragle -- W1ZI

=====

On 12/17/2010 4:18 AM, Kjeld Holm wrote:

> Dear all,
>
> I am about to install my subreceiver  and would like to finish before the
> weekend but I have no ESD work place. How can I best protect the parts? Or
> do I have to wait until I can get the needed ESD equipment?
>
> OZ1CCM, Kjeld
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
>

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Re: K3 ESD

Don Wilhelm-4
In reply to this post by Kjeld Holm
  Kjeld,

Go to the store and purchase a spray can of Static Guard - or by
whatever name it is in your country.  It is the product that the ladies
would use to keep their static charged garments from clinging.
Spray that on your clothing, chair and work area.
The improvised wrist strap that others have suggested is also a good
idea - be certain to add the resistor for your safety.

73,
Don W3FPR

On 12/17/2010 4:18 AM, Kjeld Holm wrote:
> Dear all,
>
> I am about to install my subreceiver  and would like to finish before the
> weekend but I have no ESD work place. How can I best protect the parts? Or
> do I have to wait until I can get the needed ESD equipment?
>
> OZ1CCM, Kjeld
>
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Re: K3 ESD

Tony Estep
Nobody has mentioned going barefoot, but doing so removes a major source of
static buildup.

Tony KT0NY
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Re: K3 ESD

AC7AC
In reply to this post by Kjeld Holm
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Re: K3 ESD

Vic K2VCO
I've mentioned this idea before but I like it so much I'll repeat it:

I attached a metal yardstick (meter stick) to the front of my workbench and connected it
to ground through a 1 meg resistor. My arms naturally fall on it, and it is invaluable
when building kits and cutting wire to length.

I have an aluminum muffin tin for holding parts which is also connected to ground via a
resistor.

I use a wrist strap and mat too, but I suspect the ruler would be enough by itself.

On 12/17/2010 8:22 AM, Ron D'Eau Claire wrote:

> As the KRX3 manual says (pg 5), avoid voltage differences between yourself
> and the components. If you don't have an anti-static mat or wrist strap:
>
> DO NOT use carpet on your work bench (a common practice before solid state).
> Wood, Formica, etc., is fine. Metal is also okay for this, but not a good
> practice for any bench on which you'll power up a rig.
>
> DO NOT use Styrofoam or other plastics to hold parts other than the pink
> bags some parts are shipped in.
>
> DO touch an unpainted metal ground often while working. (When without a pad
> I touch a ground every time before picking up an electronic part or pcb - it
> only takes a fraction of a second to do so.)
>
> DO touch an unpainted metal part of the K3 itself after picking up a part
> and before touching the part to the K3. (That equalizes any possible voltage
> difference between you - and the part you're holding - and the K3 so the
> charge won't flow through the part.) If you ground the metal case of the K3,
> you can touch it before picking up each part to accomplish both objectives
> at the same time.
>
> The Mains supply safety ground is a perfectly good ground to use to
> discharge yourself.
>
> There's more background on page 5 of the KRX3 manual, but the above steps
> will keep you and the parts safe without a dedicated ESD workstation.
>
> Ron AC7AC
>
>
>
> -----Original Message-----
>
> Dear all,
>
> I am about to install my subreceiver  and would like to finish before the
> weekend but I have no ESD work place. How can I best protect the parts? Or
> do I have to wait until I can get the needed ESD equipment?
>
> OZ1CCM, Kjeld
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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Re: K3 ESD

Phillip Lontz
In reply to this post by AC7AC
All the info is good....
However...
Never solder naked....


Sent from my iPad

On Dec 17, 2010, at 9:22 AM, Ron D'Eau Claire <[hidden email]> wrote:

> As the KRX3 manual says (pg 5), avoid voltage differences between yourself
> and the components. If you don't have an anti-static mat or wrist strap:
>
> DO NOT use carpet on your work bench (a common practice before solid state).
> Wood, Formica, etc., is fine. Metal is also okay for this, but not a good
> practice for any bench on which you'll power up a rig.
>
> DO NOT use Styrofoam or other plastics to hold parts other than the pink
> bags some parts are shipped in.
>
> DO touch an unpainted metal ground often while working. (When without a pad
> I touch a ground every time before picking up an electronic part or pcb - it
> only takes a fraction of a second to do so.)
>
> DO touch an unpainted metal part of the K3 itself after picking up a part
> and before touching the part to the K3. (That equalizes any possible voltage
> difference between you - and the part you're holding - and the K3 so the
> charge won't flow through the part.) If you ground the metal case of the K3,
> you can touch it before picking up each part to accomplish both objectives
> at the same time.
>
> The Mains supply safety ground is a perfectly good ground to use to
> discharge yourself.
>
> There's more background on page 5 of the KRX3 manual, but the above steps
> will keep you and the parts safe without a dedicated ESD workstation.
>
> Ron AC7AC
>
>
>
> -----Original Message-----
>
> Dear all,
>
> I am about to install my subreceiver  and would like to finish before the
> weekend but I have no ESD work place. How can I best protect the parts? Or
> do I have to wait until I can get the needed ESD equipment?
>
> OZ1CCM, Kjeld
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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Re: K3 ESD

David Gilbert
In reply to this post by David Pratt


NO no no ... you don't want to connect yourself to ground.  You want to
connect yourself to whatever semi-conducting surface you are working on
(the one that the K3 and it's components are resting on).  Connecting
yourself to ground merely increases the chance that there will be a
potential between you and the rig.

I simply laid out a large enough amount of aluminum foil to hold
everything, wrapped a bare wire around my arm just above my elbow, and
used a clip lead to connect the bare wire to the aluminum foil.  I know
everyone recommends a large value resistor be placed in series with the
bare wire for safety reasons, but I did all this on a large wooden table
several feet away from anything else and skin resistance here in dry
Arizona is fairly high anyway.

Dave   AB7E



On 12/17/2010 2:34 AM, David Pratt wrote:

> Wear cotton clothing rather than nylon or highly static material; avoid
> walking around on static-prone carpets.  Wrap a length of bare copper
> wire around your wrist and solder a 2 megohm resistor to it. Connect
> that to a nearby ground connection.  Just ensure that the K3 is always
> at the same potential as yourself by touching its frame regularly.
>
> You should be okay at that.
>
> 73 de David G4DMP
>
> In a recent message, Kjeld Holm<[hidden email]>  writes
>> I am about to install my subreceiver  and would like to finish before the
>> weekend but I have no ESD work place. How can I best protect the parts? Or
>> do I have to wait until I can get the needed ESD equipment?
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Soldering Naked

Phillip Lontz
In reply to this post by Vic K2VCO
I was 12 years old... I think it was a Heathkit HW ???
I woke up early ready to sling solder. My bed was next to my "shack/workbench".
The parents and sister were all sleeping...
Then it happened...
A large blob of solder slipped off the iron onto Mr Happy! (My new best friend)
Shrieking and shouting... the blob "stuck".
The noise from my room awakened Sister and her sleepover friend. (The one I had the sweets for.)
They stormed into my room followed by Mom and Dad.
Sisters friend was first into the room causing her to squeal as she tried to turn around and run out of the door she just came into.
Thereby running into Sis and parents.
The solder was still stuck and still hot.
By parents wanted to call the Doctor...but I had enough humiliation for one day so my Mom gave me the ointment and that was that.
Durring breakfast no one said anything about the early morning "event".

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Re: Soldering Naked

Jim Wiley-2
Eric -

Please end this thread immediately!  I could not survive another laugh
attack like that one.


- Jim, KL7CC



Phil Townsend wrote:

> I was 12 years old... I think it was a Heathkit HW ???
> I woke up early ready to sling solder. My bed was next to my "shack/workbench".
> The parents and sister were all sleeping...
> Then it happened...
> A large blob of solder slipped off the iron onto Mr Happy! (My new best friend)
> Shrieking and shouting... the blob "stuck".
> The noise from my room awakened Sister and her sleepover friend. (The one I had the sweets for.)
> They stormed into my room followed by Mom and Dad.
> Sisters friend was first into the room causing her to squeal as she tried to turn around and run out of the door she just came into.
> Thereby running into Sis and parents.
> The solder was still stuck and still hot.
> By parents wanted to call the Doctor...but I had enough humiliation for one day so my Mom gave me the ointment and that was that.
> Durring breakfast no one said anything about the early morning "event".
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>  
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Re: Soldering Naked

Tony Estep
In reply to this post by Phillip Lontz
Roflmao.

See what I mean? Barefoot ok, naked not ok.

Tony KT0NY
On Dec 17, 2010 11:48 AM, "Phil Townsend" <[hidden email]> wrote:
> I was 12 years old... I think it was a Heathkit HW ???
> I woke up early ready to sling solder. My bed was next to my
"shack/workbench".
> The parents and sister were all sleeping...
> Then it happened...
> A large blob of solder slipped off the iron onto Mr Happy! (My new best
friend)
> Shrieking and shouting... the blob "stuck".
> The noise from my room awakened Sister and her sleepover friend. (The one
I had the sweets for.)
> They stormed into my room followed by Mom and Dad.
> Sisters friend was first into the room causing her to squeal as she tried
to turn around and run out of the door she just came into.
> Thereby running into Sis and parents.
> The solder was still stuck and still hot.
> By parents wanted to call the Doctor...but I had enough humiliation for
one day so my Mom gave me the ointment and that was that.

> Durring breakfast no one said anything about the early morning "event".
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
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Re: Soldering Naked

Rick Dettinger-3
This is exactly the same advise given by a doctor on a straight razor  
forum about shaving!  He mentioned something about Darwin and genomes.

73,
Rick Dettinger   K7MW


> Roflmao.
>
> See what I mean? Barefoot ok, naked not ok.
>

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Re: K3 ESD

George Thornton
In reply to this post by Vic K2VCO
Proper electrostatic mats are cheap and readily available.  A local
electronics shop in Seattle sells 3x4 foot sheets of the material for
about $30, and they tend to charge higher prices since they are the only
local source for electronic components.

Also, Radio Shack sells a folding plastic model complete with wrist
strap, resistor and clip.  Although some on the reflector question
whether the Radio Shack model is sufficiently competent for the task, I
have had mine for many years and built a K2 and K3 on it with no
problems, and for some of it I was working over carpet.  

Why pay so much for a high quality radio and then scrimp on the anti
static mat?  

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Vic K2VCO
Sent: Friday, December 17, 2010 8:51 AM
To: [hidden email]
Subject: Re: [Elecraft] K3 ESD

I've mentioned this idea before but I like it so much I'll repeat it:

I attached a metal yardstick (meter stick) to the front of my workbench
and connected it
to ground through a 1 meg resistor. My arms naturally fall on it, and it
is invaluable
when building kits and cutting wire to length.

I have an aluminum muffin tin for holding parts which is also connected
to ground via a
resistor.

I use a wrist strap and mat too, but I suspect the ruler would be enough
by itself.

On 12/17/2010 8:22 AM, Ron D'Eau Claire wrote:
> As the KRX3 manual says (pg 5), avoid voltage differences between
yourself
> and the components. If you don't have an anti-static mat or wrist
strap:
>
> DO NOT use carpet on your work bench (a common practice before solid
state).
> Wood, Formica, etc., is fine. Metal is also okay for this, but not a
good
> practice for any bench on which you'll power up a rig.
>
> DO NOT use Styrofoam or other plastics to hold parts other than the
pink
> bags some parts are shipped in.
>
> DO touch an unpainted metal ground often while working. (When without
a pad
> I touch a ground every time before picking up an electronic part or
pcb - it
> only takes a fraction of a second to do so.)
>
> DO touch an unpainted metal part of the K3 itself after picking up a
part
> and before touching the part to the K3. (That equalizes any possible
voltage
> difference between you - and the part you're holding - and the K3 so
the
> charge won't flow through the part.) If you ground the metal case of
the K3,
> you can touch it before picking up each part to accomplish both
objectives
> at the same time.
>
> The Mains supply safety ground is a perfectly good ground to use to
> discharge yourself.
>
> There's more background on page 5 of the KRX3 manual, but the above
steps

> will keep you and the parts safe without a dedicated ESD workstation.
>
> Ron AC7AC
>
>
>
> -----Original Message-----
>
> Dear all,
>
> I am about to install my subreceiver  and would like to finish before
the
> weekend but I have no ESD work place. How can I best protect the
parts? Or

> do I have to wait until I can get the needed ESD equipment?
>
> OZ1CCM, Kjeld
>
> ______________________________________________________________
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>
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--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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Re: Soldering Naked

Jim Rogers, W4ATK
In reply to this post by Phillip Lontz
That tops the email I got about the guy buying his wife a stun gun  
which he then tried upon himself Phil.

73s Jim, W4ATK
On Dec 17, 2010, at 11:48 AM, Phil Townsend wrote:

> I was 12 years old... I think it was a Heathkit HW ???
> I woke up early ready to sling solder. My bed was next to my "shack/
> workbench".
> The parents and sister were all sleeping...
> Then it happened...
> A large blob of solder slipped off the iron onto Mr Happy! (My new  
> best friend)
> Shrieking and shouting... the blob "stuck".
> The noise from my room awakened Sister and her sleepover friend.  
> (The one I had the sweets for.)
> They stormed into my room followed by Mom and Dad.
> Sisters friend was first into the room causing her to squeal as she  
> tried to turn around and run out of the door she just came into.
> Thereby running into Sis and parents.
> The solder was still stuck and still hot.
> By parents wanted to call the Doctor...but I had enough humiliation  
> for one day so my Mom gave me the ointment and that was that.
> Durring breakfast no one said anything about the early morning  
> "event".
>
> ______________________________________________________________
> 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

JIM ROGERS
[hidden email]
http://web.me.com/jimrogers_w4atk




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Re: K3 ESD

David Pratt
In reply to this post by George Thornton
Nobody disputes that OM, but read the original post.  He is wishing to
improvise until his ESD station arrives.

In a recent message, George A. Thornton
<[hidden email]> writes
[snip]
>Why pay so much for a high quality radio and then scrimp on the anti
>static mat?
--
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +



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Re: K3 ESD

George Thornton
I stand corrected, thanks.  I have been pretty busy and did not take the
time to read all the way back.

-----Original Message-----
From: David Pratt [mailto:[hidden email]]
Sent: Friday, December 17, 2010 11:50 AM
To: George A. Thornton
Cc: [hidden email]
Subject: Re: [Elecraft] K3 ESD

Nobody disputes that OM, but read the original post.  He is wishing to
improvise until his ESD station arrives.

In a recent message, George A. Thornton
<[hidden email]> writes
[snip]
>Why pay so much for a high quality radio and then scrimp on the anti
>static mat?
--
 + - - - - - - - - - - - - - - - - +
 | David M Pratt, Kippax, Leeds.   |
 | Website: http://www.g4dmp.co.uk |
 + - - - - - - - - - - - - - - - - +



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