[Elecraft] K3 Audio Upgrade Mod

[Alexander Ponomarenko]

GA,

today I has same time for install K3-AF-mod (second part with R19 and 
R20). It was easy job. Yes, it's really worked! Now line-out are worked 
better! Here is plots "before" and "after" mod.

Line-OUT before replaced R19&R20: 
http://forum.cqham.ru/download.php?id=33360

And AFTER:
http://forum.cqham.ru/download.php?id=33361

And new R19&R20 on board :) :
http://forum.cqham.ru/download.php?id=33362

Guys from Clifton-labs are clever!

73!
Alex UR5LAM

Dr. James C. Garland wrote:

> The second part of the kit involves shunting two resistors with 51 ohm 
> resistors,  and here also Elecraft gives two options: one is to solder 
> 1/8w through-hole resistors onto the IO board, and the other is to 
> solder two tiny SMT (surface mount ) resistors piggy-back onto existing 
> SMT resistors. The kit comes with both kinds of resistors.  I elected to 
> do the SMT version of the mod, and here I’d recommend that owners opt 
> for the other method. I don’t see any advantage to doing the  SMT 
> version. It takes a very steady hand, a very small-tipped soldering 
> iron, and very good eyesight to piggy-back the two SMT resistors into 
> the circuit, and I just don’t see the reason for the hassle. It would 
> take five minutes to install the through-hole resistors, and the result 
> looks quite clean and neat.  I’d recommend also that Elecraft delete the 
> SMT option from the instructions. Took me about 30 mins to install the 
> SMT resistors, probably about half that time to install the through-hole 
> ones.
> 
>  
> 
> 73,
> 
>  
> 
> Jim W8ZR