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 <donw...@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
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