[Elecraft] [Bulk] K2 100 watt power amp fail and fix

[Bill Coleman]

On Oct 2, 2014, at 12:52 AM, paulb <xtr348165 at xtra.co.nz> wrote:

> Hi folks
> 
> thanks to historic user postings regarding the KPA100 amp
> loosing power control
> 
> D17 shorted.
> 
> Havn't got spares on hand so replaced D16 and D17 with
> stock 1N4148 which have a higher forward turn on voltage.
> 
> Output checks seem ok and RF indication on the K2 looks
> normal.

I’ve had these diodes fail twice on my in my K2/100, so I’ve replaced them with machine-pin socket pins, so I don’t have to unsolder anything to replace them.

I wrote it up on my blog, here: 
http://boringhamradiopart.blogspot.com/2014/04/fixing-k2100-again.html


Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
           -- Wilbur Wright, 1901