Ralph,
Yes, the A to B mods are worthwhile. I have done many of them.
Download the K2 A to B instructions and look at the first page to see
the entire list of associated upgrades.
The only 2 mods that are not listed there are the K2 Keying Waveshape
Mod and the Extremely High Signal Handling mod (2 back to back 1N4148
diodes at the input of the IF Amp). The K2 Keying Waveshape Mod kit was
withdrawn because the PIN diode is no longer available in thru-hole
format, but Elecraft has a substitute that is used in new K2s. I can
send you the instructions - if you want the instructions, send me a
private email.
With that serial number, you will find added benefit if you change the
IF crystals on both the RF Board and the KSB2 option. While you have
the crystals off the KSB2, it is an easy matter to change the filter
capacitors to widen the OP1 filter to 2.4kHz from the older 2.1kHz
bandwidth.
While you are at it, change the AG Gain pot and install the Alternate AF
Gain Wiring mod.
I am not certain how long it would take someone to do all the mods doing
it for the first time. It takes me less than a day, plus a couple hours
to do the alignment and test, but then I have had a lot of practice.
73,
Don W3FPR
On 4/21/2017 10:59 AM, Ralph Perreca wrote:
Hi All
I purchased my Elecraft K2 several months ago Ser # 1913 firmware 1.06F 1.02
with ATU And SSB options I am considering doing the Rev A to Rev B upgrade and
would like some feedback as to whether it is worth doing and why as well as
approx build time for a builder with average experience I have built several
small kits and the Elecraft K1
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