[Elecraft] Low PLL reference oscillator range

[John, KI6WX]

Paul;
I designed the temperature stability part of the PLL reference oscillator. 
The PLL reference tuning range needs to be a minimum of 9.8 kHz if you want 
to operate on 160 meters.  A tuning range of 8.8 kHz will not work at 1.8 
MHz.  If you only want to operate down to 3.5 MHz, a PLL reference tuning 
range of 8.8 kHz is fine.

The 8.8 kHz that appeared on the Elecraft web site was a typo - it has now 
been corrected to 9.8 kHz minimum.  ECS has not been able to control the Q 
of the 12 MHz crystals as tightly as we would like.  When they deliver 
higher Q crystals, the tuning range becomes narrower and the larger 12uH 
inductor is required to compensate for the higher Q crystals.
-John
 KI6WX

----- Original Message ----- 
From: "Paul Bruneau" <paul at ethicalpaul.com>
> 9.8 may be fine, but I have 9.26 (see below)  :)
>
> I will check out the "What's New" section as Dave G3VGR suggested, and if 
> that doesn't make sense to me I'll contact Elecraft as Dave Lowenstein 
> suggested.
>
> Thanks all, and any additional comments definitely welcome!
>
> -Paul
>
> On Apr 21, 2005, at 7:08 PM, Tim Cailloux wrote:
>
>> 9.8 is fine.  Wayne has mentioned in the past that 8.8 is the "real"
>> minimum.  I just finished #4539 and I was at 9.8 also.
>
>> ...... Original Message .......
>> On Thu, 21 Apr 2005 18:55:06 -0400 "Paul Bruneau" <paul at ethicalpaul.com>
>> wrote:
>>> My High freq: 12099.03
>>> My Low Freq: 12089.77
>>> My range: 9.26
>