[Elecraft] Fw: Hardware Differences K3

[James Sarte]

Jim,

Replacing the DSP board isn't that difficult; remove the front panel, and
you'll see the DSP board attached to the rear of the FP via a couple of
stand-offs and some screws.  If you take your time, it could be done in
under 30 minutes.  If you ordered your K3 assembled or have never taken the
FP off before, download the assembly manual from the website and you can see
the required steps beforehand.

73 de James K2QI

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Jim Miller KG0KP
Sent: Thursday, December 17, 2009 12:54 AM
To: Steve Ellington; elecraft at mailman.qth.net
Subject: Re: [Elecraft] Fw: Hardware Differences K3

Is this a mod that can be done in the field? How involved is it? What is the

parts price?

Tnx es 73, de Jim KG0KP K3 sn1442

----- Original Message ----- 
From: "Steve Ellington" <n4lq at carolina.rr.com>
To: <k4ia at aol.com>; <elecraft at mailman.qth.net>
Sent: Wednesday, December 16, 2009 2:56 PM
Subject: Re: [Elecraft] Fw: Hardware Differences K3


> We started shipping the current DSP boards, Rev C, approximately March
> 6th, 2009.
> Any K3 DSP board Rev C or later will have the extended low end audio
> frequency response h/w enhancement.
>
> This corresponds approximately to K3 serial number 2800, plus or minus
> 10-20. Since assembled -Fs and kit K3s flow through different
> manufacturing paths, there is a slight variance in s/n for the phase-in.
> If in doubt, check the DSP board Rev as noted above.
>
> These changes basically added additional h/w low end frequency response
> below 300 Hz. You need to also have the latest K3 f/w to take advantage
> of this. Of course, you can also tailor (and limit) your RX and TX
> response via the K3's IF Shift and B/W controls and by using the TX and
> RX Equalizer entries.
>
> A picture of the Rev label location on the DSP board and additional info
> is at:
> http://www.elecraft.com/K3/mods/dsp_rev_c_information.htm
>
> (The 'C', or later, revision letter at the bottom of the label is what
> is important.)
>
> We have added to our parts and mod kits page an option, K3DSPUPGD to
> swap out your current DSP for one upgraded to the latest Rev C changes.
> The cost will be $69.00 plus shipping. Order placed via this page will
> start shipping approximately in 4 weeks, around Nov 9.
>
> Steve
> N4LQ
> N4LQ at carolina.rr.com
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