[Elecraft] [POSSIBLE SPAM] Re: [POSSIBLE SPAM] Re: Need K3 Board

[Ken K6MR]

The two boards I saw had an event on the USB 5V line, not the data lines.  Almost everything connected to the USB 5V line was toasted.  So the failure modes would be different depending on the actual event.  One thing is for sure:  be sure everything in the shack is bonded so that you don’t get a ground bounce.  That is sure to take out lots of stuff.

Ken K6MR

From: Dr. William J. Schmidt<mailto:bill at wjschmidt.com>
Sent: Sunday, November 28, 2021 06:38
To: elecraft at mailman.qth.net<mailto:elecraft at mailman.qth.net>
Subject: Re: [Elecraft] [POSSIBLE SPAM] Re: [POSSIBLE SPAM] Re: Need K3 Board

The number of parts zapped by a lightning strike is impossible to determine
in advance.  The more ground paths you have (USB cables, Aux cables, audio
cables, etc.) the higher the probability of higher part mortality count.
However, in every when only the USB cable was connected, I just had to
replace the TUSB2036 and the USBLC6-2 ESD protection packs.

Your mileage may vary... lightning of course.


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

email:  bill at wjschmidt.com


-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of Ken K6MR
Sent: Saturday, November 27, 2021 1:49 PM
To: elecraft at mailman.qth.net
Subject: [POSSIBLE SPAM] Re: [Elecraft] [POSSIBLE SPAM] Re: Need K3 Board

On 11/27/2021 9:30 AM, Dr. William J. Schmidt wrote:
> I have the rework equipment in my RF lab to fix these boards and have done
so on many occasions (there are basically only two parts that can go bad on
the USB side... the ESD diode pack and the MAX-USB chip, both of which are
surface mount packs that can easily be removed).

I’ve only repaired two of these boards, but it was way more than two parts.
The ones I fixed had the hub, voltage regulator, switches, and one other
device get toasted.  All surface mount, so easy fix once the dead parts were
identified.  Cheap too, I think it was no more than $10 per board parts
cost.

Ken K6MR

From: David Gilbert<mailto:ab7echo at gmail.com>
Sent: Saturday, November 27, 2021 09:17
To: elecraft at mailman.qth.net<mailto:elecraft at mailman.qth.net>
Subject: Re: [Elecraft] [POSSIBLE SPAM] Re: Need K3 Board


I think that's an excellent offer.  In the absence of Elecraft supporting
these older boards (as I stated in my first post, when I asked Elecraft to
repair my KIO3 they declined), it would be great if we could compile a small
database of people like yourself willing and able to do proper repair ...
for a reasonable fee, of course.

If somebody was willing to do this on a regular basis, I suspect that many
of us would be willing to simply donate older/excess boards.  I have a
couple that I would.

73,
Dave   AB7E


On 11/27/2021 9:30 AM, Dr. William J. Schmidt wrote:
> I have the rework equipment in my RF lab to fix these boards and have done
so on many occasions (there are basically only two parts that can go bad on
the USB side... the ESD diode pack and the MAX-USB chip, both of which are
surface mount packs that can easily be removed).  If you have bad KIO3B
boards, please sell them to those of us that can repair them and keep them
in stock for future needs.
>
>
> Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
> PJ2/K9HZ
>
> email:  bill at wjschmidt.com
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to k6mr at outlook.com

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to bill at wjschmidt.com


--
This email has been checked for viruses by AVG.
https://www.avg.com

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to k6mr at outlook.com