K2 build from purgatory!

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K2 build from purgatory!

lstavenhagen
Well, more kudos to Elecraft support are in order, so just want to give credit where exceptional credit is due. My second K2 build is going nowhere as smoothly as my first one: I somehow managed to lose D36, the SMT PIN diode and didn't discover that it was actually gone from my table until I got to that installation step. Prior to that, though, I managed to burn a pretty decent corner off one of the latching relays on the board. So I get to practice my difficult-to-remove-part removal skills to replace it!

All this of course, a warning to everyone to not ever "press on" with a build when one is tired. That's how I managed to burn the corner off the relay while soldering in another component on the board, I just wasn't paying attention to where the iron was going!

As for D36, I must have flicked it off the table at some point in the past and where she went, nobody knows.

Despite all that, I'm still having a wonderful time with this build and have learnt more in the process than I think I ever did on any other project I've done.

So I emailed parts@elecraft.com with my tail between my legs this weekend - I think they all know me there now LOL - and they sent me replacements yesterday, pretty much taking care of it right as they opened for business. So I should have the replacement parts in hand on Thurs.  Can't get better service than that!

Only a couple more parts and the receiver will be finished. If I made any goofs so far, well, I suppose I'll find out soon enough.

Tnx to Elecraft and 73
LS
W5QD
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Re: K2 build from purgatory!

Don Wilhelm-4
LS and all,

Perhaps it is time for a repeat of the following information --

When removing parts from a populated board, it is good to keep in mind
that keeping the board and it thru-plated holes intact is the most
important thing.  While it is *nice* to be able to remove the part
intact, there is no need for that.  If the de-soldering does not respond
to whatever methods you have available, then crush the part with
whatever tool works and remove its pins one at a time.
Clean up with solder wick and if solder still remains in the holes, heat
the solder pad and push a wooden toothpick or stainless steel needle
through the hole to clear the solder.

73,
Don W3FPR

On 4/12/2016 10:54 AM, lstavenhagen wrote:
> So I get
> to practice my difficult-to-remove-part removal skills to replace it!
>
> All this of course, a warning to everyone to not ever "press on" with a
> build when one is tired. That's how I managed to burn the corner off the
> relay while soldering in another component on the board, I just wasn't
> paying attention to where the iron was going!
>
>

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Re: K2 build from purgatory!

lstavenhagen
Ah yes, thanks for that reminder. If it comes to that, is there a good way to smush a latching relay body without dangerously ripping the pins out of the board? I worry that crushing it with say a pair of pliers could stress the through-holes in the board. Or is it just not that strong?

Thanks,
LS
W5QD
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Re: K2 build from purgatory!

Don Wilhelm-4
LS,

I would try pliers first, but watch the process as you apply pressure.  
It may assist if you damage the case more with your soldering iron (melt
more of the plastic) until you can get an Exacto knife edge into it to
help with the process.
As I said, use any tool that works - just be careful not to damage other
nearby components.

73,
Don W3FPR

On 4/12/2016 3:11 PM, lstavenhagen wrote:

> Ah yes, thanks for that reminder. If it comes to that, is there a good way to
> smush a latching relay body without dangerously ripping the pins out of the
> board? I worry that crushing it with say a pair of pliers could stress the
> through-holes in the board. Or is it just not that strong?
>
> Thanks,
> LS
> W5QD
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K2-build-from-purgatory-tp7616239p7616253.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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Re: K2 build from purgatory!

Jim Allen
In reply to this post by lstavenhagen
Whatever you do, be careful with that rotary encoder.  I just had to have Don replace the one in my K2.  Those are $125 each, probably the most expensive part in the entire radio!  Don't lose it!!

73 de W6OGC Jim Allen

Sent from my iPad
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K2 build from purgatory!

Edward A. Dauer
In reply to this post by lstavenhagen
I’ll second all of that.  In the middle stages of the K1 build last week
C22, the smallest capacitor in the inventory, escaped from the parts bin -
presumably to avoid being soldered - disappearing into a carpet the nap of
which is several multiples of the cap’s full girth. (Your D36 may have
done the same.)  Richard Trebbien had another one in my hands within 72
hours.  Kudos indeed!

Ted, KN1CBR

>------------------------------
>
>Message: 12
>Date: Tue, 12 Apr 2016 07:54:46 -0700 (MST)
>From: lstavenhagen <[hidden email]>
>To: [hidden email]
>Subject: [Elecraft] K2 build from purgatory!
>Message-ID: <[hidden email]>
>Content-Type: text/plain; charset=us-ascii
>
>Well, more kudos to Elecraft support are in order, so just want to give
>credit where exceptional credit is due. My second K2 build is going
>nowhere
>as smoothly as my first one: I somehow managed to lose D36, the SMT PIN
>diode and didn't discover that it was actually gone from my table until I
>got to that installation step. Prior to that, though, I managed to burn a
>pretty decent corner off one of the latching relays on the board. So I get
>to practice my difficult-to-remove-part removal skills to replace it!
>
>All this of course, a warning to everyone to not ever "press on" with a
>build when one is tired. That's how I managed to burn the corner off the
>relay while soldering in another component on the board, I just wasn't
>paying attention to where the iron was going!
>
>As for D36, I must have flicked it off the table at some point in the past
>and where she went, nobody knows.
>
>Despite all that, I'm still having a wonderful time with this build and
>have
>learnt more in the process than I think I ever did on any other project
>I've
>done.
>
>So I emailed [hidden email] with my tail between my legs this weekend
>-
>I think they all know me there now LOL - and they sent me replacements
>yesterday, pretty much taking care of it right as they opened for
>business.
>So I should have the replacement parts in hand on Thurs.  Can't get better
>service than that!
>
>Only a couple more parts and the receiver will be finished. If I made any
>goofs so far, well, I suppose I'll find out soon enough.
>
>Tnx to Elecraft and 73
>LS
>W5QD
>
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Re: K2 build from purgatory!

lstavenhagen
In reply to this post by Don Wilhelm-4
Hi Don,
I was actually thinking just that - just use my soldering iron and finish the job I originally started on it lol! I'm lucky that it's one of the relays in the lowpass filter and not the 40 meter filter, so there are no components around it of any real note yet....
That may be exactly what I do with it, in fact.

Thanks,
LS
W5QD
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Re: K2 build from purgatory!

daleputnam
In reply to this post by Don Wilhelm-4
I've had good luck removing that relay with a hot air smd rework station.. one must be aware of how much air.. and what temp.. but heat applied to the other side of the board, just enough to flow the solder.. on one pin at a time.. to lift the relay a smidge.. then move to the next pin.. .. OR enough heat to simply lift the relay.. either way works..
and relay removal by pieces works too.

Have a great day,
--... ...-- Dale - WC7S in Wy


________________________________________
From: Elecraft <[hidden email]> on behalf of Don Wilhelm <[hidden email]>
Sent: Tuesday, April 12, 2016 1:49 PM
To: lstavenhagen; [hidden email]
Subject: Re: [Elecraft] K2 build from purgatory!

LS,

I would try pliers first, but watch the process as you apply pressure.
It may assist if you damage the case more with your soldering iron (melt
more of the plastic) until you can get an Exacto knife edge into it to
help with the process.
As I said, use any tool that works - just be careful not to damage other
nearby components.

73,
Don W3FPR

On 4/12/2016 3:11 PM, lstavenhagen wrote:

> Ah yes, thanks for that reminder. If it comes to that, is there a good way to
> smush a latching relay body without dangerously ripping the pins out of the
> board? I worry that crushing it with say a pair of pliers could stress the
> through-holes in the board. Or is it just not that strong?
>
> Thanks,
> LS
> W5QD
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K2-build-from-purgatory-tp7616239p7616253.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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
> Message delivered to [hidden email]
>

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Re: K2 build from purgatory!

lstavenhagen
In reply to this post by Jim Allen
Yes, I spent a lot of good quality time with the encoder installation and it came out fine in the end. To be honest, all these "problems" have nothing to do with the kit - it's more I've made more mistakes with this one than my first K2 build.

On the other hand, the mistakes I have made have been the most instructive. When I've messed something up or something didn't look right (like a possibly bridge solder connection), I'd simply stop and go study the schematic. I'd spend some time there, then go google "PLL synthesizer" or "contact debouncing" or "why do relay coils have diodes across them". Then come back to the schematic and see how Wayne and Eric did it. and so forth.

So my screwups have actually really helped me learn all the stuff I should have actually learned when I took my Extra hi hi.

And chances are, with these messups, I'm probably going to learn something else in addition. I hope the rig works at the end too, that would really be gravy!

73,
LS
W5QD.
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Re: K2 build from purgatory!

James Bennett
In reply to this post by daleputnam
Since I no longer have a K2, I’m only taking a WAG here, but would this not be a good candidate for Chip Quick? I used it to pull an SMD IC off a board a few weeks ago and it absolutely works great….

73, Jim / W6JHB


> On   Tuesday, Apr 12, 2016, at  Tuesday, 1:24 PM, Dale Putnam <[hidden email]> wrote:
>
> I've had good luck removing that relay with a hot air smd rework station.. one must be aware of how much air.. and what temp.. but heat applied to the other side of the board, just enough to flow the solder.. on one pin at a time.. to lift the relay a smidge.. then move to the next pin.. .. OR enough heat to simply lift the relay.. either way works..
> and relay removal by pieces works too.
>
> Have a great day,
> --... ...-- Dale - WC7S in Wy
>
>
> ________________________________________
> From: Elecraft <[hidden email]> on behalf of Don Wilhelm <[hidden email]>
> Sent: Tuesday, April 12, 2016 1:49 PM
> To: lstavenhagen; [hidden email]
> Subject: Re: [Elecraft] K2 build from purgatory!
>
> LS,
>
> I would try pliers first, but watch the process as you apply pressure.
> It may assist if you damage the case more with your soldering iron (melt
> more of the plastic) until you can get an Exacto knife edge into it to
> help with the process.
> As I said, use any tool that works - just be careful not to damage other
> nearby components.
>
> 73,
> Don W3FPR
>
> On 4/12/2016 3:11 PM, lstavenhagen wrote:
>> Ah yes, thanks for that reminder. If it comes to that, is there a good way to
>> smush a latching relay body without dangerously ripping the pins out of the
>> board? I worry that crushing it with say a pair of pliers could stress the
>> through-holes in the board. Or is it just not that strong?
>>
>> Thanks,
>> LS
>> W5QD
>>
>>
>>
>> --
>> View this message in context: http://elecraft.365791.n2.nabble.com/K2-build-from-purgatory-tp7616239p7616253.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>>
>
> ______________________________________________________________
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