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
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