[Elecraft] [K2] PLL Reference Oscillator Question

[bviets]

Hello Don,

Hope you had a good New Year's.

I replaced X1 and subsequently D16 and D17, with no luck, still reading
12650.  Getting a little  frustrated.  Any suggestions?  
73,
Byron
N6UI 


bviets wrote:
> 
> Don,
> Well everything checked out, i can't find any fault with the installation
> of those components.  Looks like I need to order some parts, unless you
> can think of anything else I should check.  If I haven't mentioned it,
> thank you for all of your help and attention.  
> 73,
> Byron
> N6UI
> 
> 
> 
> Don Wilhelm-4 wrote:
>> 
>> Byron,
>> 
>> Fine on all that, so far so good - next is to check L31, X1, R21, D18, 
>> C84 and C85 for good soldering, and make certain D16 and D17 are 
>> oriented correctly.
>> If nothing is found awry, I would arbitrarily replace X1 as the first 
>> step and after than D16 and D17.  Remember that this is just like a VXO 
>> circuit, no real 'magic', you add capacitance (that is what the 
>> varactors should be doing at lower voltages) and the frequency shifts 
>> downward.
>> 
>> 73,
>> Don W3FPR
>> 
>> bviets wrote:
>>> Don,
>>> I also took the liberty to do the checks on: RP2 pin 2, and the cathodes
>>> on
>>> D16 and D17 and they all behaved like U6 pin 1: 7.4 and zero when
>>> switching
>>> between BAND+ and BAND-.
>>> 73,
>>> Byron
>>> N6UI
>>>   
>>>
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> 

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