[Elecraft] K2 S/N 1999

[George W]

Don Wilhelm-4 wrote:
> 
> Ed,
> 
> Yes, all the upgrades (and the optional ones too) is my recommendation - 
> why skimp when you have it all torn down.  Although not entirely 
> necessary for the KPA100 installation, the added heat of the KPA100 
> makes the BFO upgrade, the PLL upgrade and the Thermistor (PLL 
> temperature compensation) mods are highly recommended.  With an older 
> K2, you will have to modify the Control Board to change the sidetone 
> source and free U6 pin 25 for use with the computer interface, so you 
> have one cut right there that is required.
> 
> I recall our discussion at Dayton, and I also recommended you change the 
> IF crystals to the newer spec crystals too - that will improve your 
> filters, and if you want, change the caps on the KSB2 to widen that 
> filter out to 2.4 kHz or even 2.6 kHz.
> 
> I have no comment on the other amp questions.
> 
> 73,
> Don W3FPR
> 
> Ed Lambert wrote:
>> I have been inactive for about 5 years. My K2 is cw only with KNB2,
>> KDSP2,
>> KAF2 (now uninstalled), KAT2, and KIO2.
>>
>>  
>>
>> I want to get back on the air and want to bring my transceiver up to
>> current
>> specification for possible modification to K2/100. Discussion with
>> Elecraft
>> staff at Dayton seemed to indicate that I really didn't need to do much
>> to
>> my radio to install the KPA100 option. However, the KPA100 manual seems
>> to
>> want a complete A to B upgrade in addition to K2KEYMDKT, E850138 and
>> BFOMDKT.
>>
>>  
>>
>> I have been stubbornly resistant to some of these upgrades because they
>> result in great insult to the inherent beauty of my radio (it has no
>> trace
>> cuts nor does it have slapdash parts soldered hither and yon. I think I
>> have
>> gotten past this squeamishness, however, and am ready to move forward.
>>
>>   
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> 
> I concur with everything that Don said. I did all these upgrades several
> years ago to my K2. I was squeamish also, but the improved performance far
> outweighed the slight blemish of the various mods.
> 
> As far as waiting for the KPA500 in lieu of the KPA100, I would think you
> would need the KPA100 in order to have enough power to drive the KPA500.
> 
> Have fun.
> 
> 73,  George, NC5G   K2/100   s/n 2217  
> 
> 
> 

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