[Elecraft] K2 INFO 232

[Don Wilhelm]

Chuck,

If you are referring to the X1/X2 situation rather then the CAL PLL 
band, even the rev B boards have silkscreen and holes for X2, but X2 is 
left open.  The BFOMDKT and the Thermistor mod replace X1 and remove X2.
The basic A to B mods do not, but those mod kits are a part of the 
overall A to B mods.

73,
Don W3FPR

On 4/20/2018 8:27 AM, hawley, charles j jr wrote:
> So A to B upgrades but not necessarily the rev B board?
>
> Chuck Jack
> KE9UW
>
> Sent from my iPhone, cjack
>
>> On Apr 19, 2018, at 11:32 PM, Don Wilhelm <donwilh at embarqmail.com> 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
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to donwilh at embarqmail.com
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to c-hawley at illinois.edu