[Elecraft] K2 INFO 232

[EricJ]

OK, thanks, Don. As I said, I went into this perfectly happy with how 
the K2 is performing. I have SN 6911 right beside it and find no 
discernible difference between the two. Both are solid. I just wanted to 
verify the alignment after 13 years of use and refamiliarize myself with 
the internals.

Eric KE6US



On 4/19/2018 9:32 PM, Don Wilhelm wrote:
> Erik,
>
> Your K2 has the A to B updates, do NOT put X2 in!
> For Firmware level 2.01 and above, CAL PLL is done only on 40 meters 
> (for all bands).  If attempted on other bands, you will get an INFO 
> 232 error.
>
> Use the information in the newer manual - the older manual has 
> information *only* applicable to K2s that have not been upgraded.
>
> 73,
> Don W3FPR
>
> On 4/19/2018 10:18 PM, EricJ wrote:
>> I have K2 SN 567. I didn't really have a problem with it, but I 
>> bought it used in 2005, had W3FPR look at it then, and install latest 
>> mods to bring it up to date. Today, I thought it might be time to 
>> take a look at alignment, and freshen it up a bit.
>>
>> When I did the "PLL Ref Osc Range Test" in Alignment Part II, the 
>> range was slightly less than 6 kHz. When I got to "VFO 
>> Linearization", 40 meters was fine without any INFO messages.
>>
>> I was using the original Rev B manual (not related to RevB board) 
>> that came with it. Under Part III, Alignment and Test there is 
>> another "VFO Linearization (All Bands)". I did that and every band 
>> failed (INFO 232) except 40 meters. And of course, in the Rev B 
>> manual, there is no INFO 232 only 235. Anyway, I checked around Q19 
>> as the Troubleshooting suggested and found X1, but no X2. After 
>> reading the circuit operation, I was convinced somehow X2 got left 
>> out. Since it was supposed to be there to prevent the very short 
>> range problem I thought I was experiencing, I thought I had found the 
>> problem.
>>
>> I emailed Elecraft to order X2, and got a nice note from Mike saying 
>> they would send one out no charge. That kind of service still amazes 
>> me. But I told him to hold off until I can hear from this group.
>>
>> I checked my other K2 manual (I also have SN 6911), and, first, it 
>> does not have a procedure for VFO linearization on anything but 40 
>> meters. In fact, it says INFO 232 probably occurred because I wasn't 
>> on 40m. And the parts lists says X2 is not used!
>>
>> I went into this without having any actual problem or complaint. The 
>> old manual convinced me I did. The later Rev I manual says I might, 
>> but didn't know it. I'm supposed to have a PLL range of 9.8 to 15 
>> kHz. I have 5.97 kHz.
>>
>> So if that is a problem, the problem is associated with Q19 which is 
>> a very simple stage. X1 is probably the most likely cause. Any ideas?
>>
>> Also, since two crystals were originally used to "de-Q one another to 
>> increase the tuning range", what was done to make two crystals 
>> unnecessary?
>>
>> Thanks for any help,
>> Eric KE6US
>>
>>
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