[Elecraft] K2 INFO 232

[Don Wilhelm]

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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