[Elecraft] New Rev B K2

[Don Brown]

Hi

Some of the mods are a little more difficult than others. The 2nd xtal
filter mod does not require any traces to be cut. All of the mods on the RF
board will be on the bottom of the board and will not show unless you remove
the bottom cover. The most difficult mod to do is the audio pot mod and it
does require some traces to be cut on the front panel, control and RF board.
The mods that are most noticeable are the ones on the control board for the
sidetone source and sinewave sidetone. Perhaps Elecraft will make the new
control board kit available if you want to replace it with the new one. As
everything is out of site on the bottom your K2 would look just like the 'B'
version.

Don Brown
KD5NDB


----- Original Message -----
From: <k6se@juno.com>
To: <DolfinDon@msn.com>; <elecraft@mailman.qth.net>
Sent: Wednesday, November 06, 2002 5:57 PM
Subject: Re: [Elecraft] New Rev B K2


> Don, KD5NDB wrote:
>
> "This is all of the normal stuff we have been adding to the bottom of the
> K2 with a few more minor changes. ALC, 10 meter bandpass filter mod, 2nd
> xtal filter mod, sinewave sidetone mod, sidetone source mod, audio pot
> mod, VFO drift mod, BFO drift mod.
>
> All of this is now part of the circuitry of the Rev B boards but can
> easily be added to the Rev 'A' board as most of us have done."
> ==========
> I've done the 2nd xtal filter mod which required cutting a trace on the
> RF board.
>
> The audio pot mod required cutting traces on the RF board, on the Control
> board, and on the Front Panel board.  Jumper wires had to be added to
> each of the three PC boards.
>
> The sidetone source mod (required for the I/O kit or the KPA100 kit)
> required cutting traces and installing jumper wires on the Control board.
>
> KD5NDB says the mods can "easily be added", which is debatable.  It
> certainly wasn't easy in my case, and I'm a NASA-certified solderer and
> have been building kits since 1955.
>
> Although the mods improve the K2, they remove the professional appearance
> of the inner workings of the radio by those unsightly jumper wires and
> added parts.  New K2 builders who receive the new boards should be
> extremely thankful that they won't have to do these mods and ruin the
> internal appearance of their radios.
>
> The new kits with Rev B boards may prompt many K2 owners to buy a new kit
> to replace their adulterated K2s.  I know I'm tempted to, and may do just
> that if the VFO/BFO mod kit(s) alleviate temperature drift to within
> reason (I'll soon know).
>
> Wayne announced an "complete update kit", which I'm all ears about, but
> wonder how it can be done without replacing all three affected boards
> (RF, Control and Front Panel) and their components??
>
> 73, de Earl, K6SE
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