[Elecraft] KPA500 Mod Kit?

[Mark E. Musick]

Perhaps he was speaking of the 12 meter lowpass filter mod.
Some earlier KPA500s had a problem on 12 meters. Elecraft came out with a
mod you could perform yourself or send the amp in and they would do it for
you for free except you had to pay the shipping.
You didn't have to send the whole amp back. Just the RF module.
I have KPA500 serial #1523 and sent the RF module to Elecraft in July of
2014. It cost me $15.00 to ship the module. The invoice shows one hour of
labor at $99.00, but no charge to me. They shipped it back to me at their
expense.
I don't know if it was Elecraft policy to do the mod for free for everyone.
My amp was one of the T33A DXpedition amps. On the invoice it says T33A amp
upgrade.

73,
Mark, WB9CIF

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On
Behalf Of David F. Reed
Sent: Tuesday, July 10, 2018 11:36 AM
To: Petr, OK1RP/M0SIS <indians at xsmail.com>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA500 Mod Kit?

Sorry I missed it, but what is this mod for? Is it Elecraft approved?

Thanks & 73 de W5SV - Dave



> On Jul 10, 2018, at 06:02, Petr, OK1RP/M0SIS <indians at xsmail.com> wrote:
> 
> Hi,
> 
> upon some emails regarding this modification procedure steps I am 
> sharing this note also over here on the reflector. (I am sorry if its 
> bothering for
> someone...)
> 
> I am recommending after several mods done - when Q5 is removed > do 
> not install new BU931T back to its place for now. Go to another step > 
> remove R5.
> After that step solder the new BU931T transistor to Q5 position and 
> follow another steps normally.
> 
> If you will do it according to Elecraft manual then you will find that 
> there is quite small space around and it is too narrow to put your 
> soldering tip in between big transistors to remove the R5... You are 
> also in risky to damage parts by hot tip.
> 
> I am planning to put attention to my blog and modify my article 
> accordingly over here:
> http://ok1rp.blogspot.com/2017/02/elecraft-kpa500-lpf-tr-switch-rework
> .html
> 
> In case of troubles I can help with parts like transistors or other parts.
> (I made this modification on several KPA500 for Elecrafters)
> 
> Hope it will help.
> 
> 
> 
> 
> 
> -----
> 73 - Petr, OK1RP
> "Apples & Elecrafts freak" 
> http://ok1rp.blogspot.com
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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