new revision of KPA500 LPF T_R Switching rework Rev.E guide available

[ANDY DURBIN]

The posted link points to a web page dated 7 February 2017.   Was the page content changed without changing the date?

I checked my KPA500 schematics and the component values listed in the mod instructions all seem to be the same as those shown in "KPA 500 TR Switch" page 3 of 3, rev D2, dated 12/5/13.   Should I assume that all KPA500 delivered after 2013 would have this modification included?

73,
Andy, k3wyc
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[ANDY DURBIN]

"It is this surface mount board that needs its parts changed".

I suspect that should be  - "some early surface mount boards may need their parts changed".

As I posted earlier, and show again below, this mod appear to have been introduced late 2013.

Elecraft must be enjoying the confusion.  If not, someone would post which serial numbers may need to be modified.

Andy, k3wyc

________________________________
From: Andy Durbin
Sent: Tuesday, September 24, 2019 9:38 AM
To: [hidden email] <[hidden email]>
Subject: [Elecraft] new revision of KPA500 LPF T_R Switching rework Rev.E guide available

The posted link points to a web page dated 7 February 2017.   Was the page content changed without changing the date?

I checked my KPA500 schematics and the component values listed in the mod instructions all seem to be the same as those shown in "KPA 500 TR Switch" page 3 of 3, rev D2, dated 12/5/13.   Should I assume that all KPA500 delivered after 2013 would have this modification included?

73,
Andy, k3wyc
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[Wes Stewart-2]

I don't believe that configuration management is Elecraft's strong suit.

On 9/30/2019 4:17 PM, Andy Durbin wrote:
> Elecraft must be enjoying the confusion.
>
> Andy, k3wyc
>

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[Bill K9YEQ]

Please explain.

73,
Bill
K9YEQ

https://wrj-tech.com/

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Wes
Sent: Monday, September 30, 2019 6:58 PM
To: [hidden email]
Subject: Re: [Elecraft] new revision of KPA500 LPF T_R Switching rework Rev.E guide available

I don't believe that configuration management is Elecraft's strong suit.

On 9/30/2019 4:17 PM, Andy Durbin wrote:
> Elecraft must be enjoying the confusion.
>
> Andy, k3wyc
>

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[Petr, OK1RP/M0SIS]

Andy

do not glue to date of first post date in the link. Please follow and refer
to its revision date in the end of the document in the link as it keeps
updated as much as possible.

Simply check the revision label on the PA/LPF board of your KPA500 and if
you have rev. D9 or earlier with surface mount board (NO earlier rev. A or B
with thru-hole yellow capacitors board) then the mod is for you if needed.

As I mentioned it is not neccessary to do it if you hate to open and
dismantling your KPA500 if all is currently working well for you... There is
tons of amps that works like champ even they are old and not modified. So if
you have not issues and do not want to make prevent mod then stay calm.

BTW: yes it is official mod, Elecraft parts kit: E850607

good luck,
Petr, OK1RP



-----
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
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Sent from: http://elecraft.365791.n2.nabble.com/
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