[Elecraft] K2 #4830 IS ALIVE

[George Cortez]

Hi
 I checked all you said and the voltage still wont move
I ohmed the t5 out and its about 350ohm across from 1-2 to 3-4
all else looks good. 80&40 are the same voltage
20/17 are under 4.5v 15 is the same as 80/40 abt 7.95v
12/10 under 5.5v I think t5 will have to be rewound?
What do you think?

George 





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Hi George: 

To get a 12 uH L31, get in touch with Gary, or Parts, or Support at
Elecraft. I'm sure they will ship you one out right away. Here is quote from
an email I got from Gary about this issue: "We are in the process of
switching over to the 12uH choke until the current lot of PLL crystals is
used up. Most of them so far have shown slightly lower than needed range
with the 10uH choke." 

The most probable cause of being unable to adjust the VCO voltage with L30,
assuming correct installation of T5, L30, C72, and the PLL temp comp board,
is having the 1-2 (red wire) windings on T5 too bunched up. Check that they
are spread out around the 'roid like shown in the picture. You don't need to
uninstall T5 to do this... Just use the green tuning stick that comes with
the K2 to slide the windings on the 'roid. If there is no voltage change at
all when you adjust L30 (also change bands to see if the voltage is
different on another band), then you need to check for a short, solder
bridge on or in the vicinity of the l'il PLL temp compensation board that
you put together. It is very easy to create a l'il solder bridge or short on
that l'il guy.

Good Luck!!!

73,
Ken K3IU